WASM exports

Generated by scripts/gen_wasm_manifest.mjs from the Rust source - do not edit. Run npm run docs:wasm to refresh.

Every one of the 167 functions the solver exports to JavaScript, with the JSON each one reads and returns. 135 of the 158 that exchange JSON have both their input and their result typed; the others say which side is untyped and why. For worked examples of the most used calls, see the WASM API guide.

Conventions. A &str parameter is a JSON string and a String result is JSON. Units are SI (m, N, Pa, N·m) unless a field says otherwise. A call that cannot run returns {"error": "..."} instead of its result. Field types link to WASM types. The machine-readable schemas are in docs/api/fem-wasm-schemas.json in the repository.

Analysis

analysis_report

Builds the analysis report from the model and its results.

analysis_report(model_json: &str, results_json: &str) -> String

Input model_json: WasmModel

Field	Type	Required	Description
cables	WasmCable[]		Per-cable-member settings for the 3D nonlinear path (ADR 0013 Step 1): which model ("chord" | "catenary") and the optional unstressed length in metres. Default: [].
design_code	string		Design code for member capacity checks: "AS4100" (default), "AISC360", "EC3". Default: "AS4100".
diaphragms	WasmDiaphragm[]		Default: [].
double_angle_connectors	DoubleAngleConnectors[]		Double-angle interconnectors (SA-156) - see model::DoubleAngleConnectors; the core type's own serde shape is the wire shape. Default: [].
end_gaps	WasmEndGap[]		Member-end gaps (ADR 0013 Step 2): { member_id, gap_mm } on truss / compression-only members. Default: [].
load_cases	WasmLoadCase[]	yes
load_combinations	WasmLoadCombination[]		Default: [].
materials	WasmMaterial[]	yes
member_loads	WasmMemberLoad[]	yes
members	WasmMember[]	yes
nodal_loads	WasmNodalLoad[]	yes
nodes	WasmNode[]	yes
plate_loads	WasmPlateLoad[]		Default: [].
plate_orthotropy	PlateOrthotropy[]		Orthotropic plates: { plate_id, axis: [x, y, z], input: { kind: "material", e1, e2, g12, nu12, g13, g23 } | { kind: "rigidities", a11, a22, a12, a66, d11, d22, d12, d66, s13, s23 } }. The core type's own serde shape is the wire shape; see model::PlateOrthotropy. Default: [].
plates	WasmPlate[]		Default: [].
sections	WasmSection[]	yes
shear_centre_loaded	integer[]		Member ids loaded at the shear centre rather than on the top flange (the default) - see model::Model::shear_centre_loaded. Default: [].

Input results_json: WasmResults

Field	Type	Required	Description
auto_restrained	WasmSingularDof[]		Zero-stiffness DOFs auto-restrained so the model could solve (aggregated across load cases, de-duplicated). Empty/omitted for a clean model.
combinations	WasmCombinationResults[]
combo_stations_omitted	boolean		The combinations carry no station forces (a large job; see COMBO_STATION_LIMIT). Their stations are the factored sum of their load cases' - the studio rebuilds them on demand.
conditioning	WasmSoftDof[]		Free DOFs left "soft" (tiny but non-zero diagonal stiffness) after auto-restrain - the model solved but is near-singular here, so results may be unreliable (aggregated across load cases, keeping the worst stiffness ratio per node/dof). Empty/omitted for a well-conditioned model.
envelope	WasmEnvelopeResults | null
load_cases	WasmLoadCaseResults[]	yes

Result: AnalysisReport

Result fields

Field	Type	Required	Description
maxDisplacements	DisplacementExtreme[]	yes
maxReactions	ReactionExtreme[]	yes
memberUtilisation	MemberUtilSummary[]	yes
passFailRollup	PassFailRollup	yes
stats	ModelStats	yes

auto_size

Run the AS 4100 / AS 4600 member-mode auto-sizer entirely in Rust. Input: { model, candidates: {category: [section+mass_kg_m+category]}, sizable: [{member_id, category, current_kg}], options: {target, max_iter} }. Candidates are supplied by JS (the catalogue stays there) already sorted lightest-first per category. Returns the change report { changes:[{id,num,to,toKg,util}], massBefore, massAfter, iterations, converged, target }. AS path only - the international codes (AISC 360 / EC3 / AS 5100 / EIT) and group mode remain in the JS optimiser.

auto_size(json_input: &str) -> String

Input json_input: WasmAutoSizeInput

Field	Type	Required	Description
candidates	{ [key]: WasmAutoSizeCandidate[] }
model	WasmModel	yes
options	WasmAutoSizeOptions
sizable	WasmSizableSpec[]

Result: AutoSizeReport

Result fields

Field	Type	Required	Description
changes	AutoSizeChange[]	yes
converged	boolean	yes
iterations	integer	yes
massAfter	number	yes
massBefore	number	yes
none	boolean	yes
solveError	string | null		Why an analysis inside the loop failed, when one did. A failed solve used to end the loop with changed already false, so a mechanism reported converged: true with nothing sized (SA-34).
target	number	yes

building_slenderness_check

Building slenderness in one direction against the given limit.

building_slenderness_check(json_input: &str, direction: &str, limit_ratio: f64) -> String

Input json_input: WasmSolveInput

Field	Type	Required	Description
model	WasmModel	yes
options	WasmSolveOptions		Default: {"extrapolate_plate_results":false,"n_stations":11,"smooth_plate_nodal_results":false,"station_output":"objects"}.

Input direction: untyped (no typed parse of this parameter)

Result: BuildingSlendernessReport

Result fields

Field	Type	Required	Description
building_height_m	number	yes
direction	string	yes	Direction that was checked: "x", "y", or "xy" (resultant).
governing_load_case_id	integer	yes
governing_node_id	integer	yes
limit_ratio	number	yes
max_displacement_m	number	yes
pass	boolean	yes
slenderness_ratio	number | null		The slenderness ratio, or None when there was NO lateral displacement at all - in which case there is no ratio to report rather than an infinite one. THIS USED TO BE f64::INFINITY, and JSON has no infinity: serde writes it as null, so the field arrived as null and the UI's truthiness guard skipped the whole line. A building that did not sway showed NOTHING - not "passes", not "no displacement", nothing - while the check had in fact passed. Making it Option says the same thing in the type and gives the panel something explicit to render.

fem_set_trace

Turn the entry tracing above on or off. Returns the state it is now in, so a caller can assert it rather than assume it.

fem_set_trace(on: bool) -> bool

Result: untyped (returns bool, not JSON)

fem_trace_enabled

Whether entry tracing is on. Exported so a check can prove the default is OFF - a default nobody can read is a default that drifts.

fem_trace_enabled() -> bool

Result: untyped (returns bool, not JSON)

influence_line

Influence line for a moment, shear or reaction on a single-span beam.

influence_line(json_input: &str) -> String

Input json_input: WasmInfluenceLineInput

Field	Type	Required	Description
action	string	yes
n_points	integer		Default: 101.
span	number	yes
station	number	yes
support_type	string	yes

Result: WasmInfluenceLineResult

Result fields

Field	Type	Required	Description
action	string	yes
ordinates	number[]	yes
positions	number[]	yes
span	number	yes
station	number	yes
support	string	yes

influence_line_continuous

Influence line on a continuous beam model by repeated solves.

influence_line_continuous(json_input: &str) -> String

Input json_input: WasmContinuousInfluenceLineInput

Field	Type	Required	Description
action	string	yes
member_ids	integer[]	yes
model	WasmModel	yes
n_points	integer		Default: 101.
station_local_x	number	yes
station_member	integer	yes
support_node	integer		Default: 0.

Result: WasmContinuousInfluenceLineResult

Result fields

Field	Type	Required	Description
action	string	yes
ordinates	number[]	yes
positions	number[]	yes
station_local_x	number	yes
station_member	integer	yes
support_reaction_node	integer | null
total_length	number	yes

member_capacities_only

Compute AS 4100 member capacities WITHOUT running a full FEM solve. * json_input - WasmMemberCapacitiesInput JSON string Returns JSON {"member_capacities": [...]} or {"error": "..."}.

member_capacities_only(json_input: &str) -> String

Input json_input: WasmMemberCapacitiesInput

Field	Type	Required	Description
member_forces	WasmMemberForce[]		Optional member forces for alpha_m / utilisation update. If provided, must contain one entry per member with solved end forces. Default: [].
model	WasmModel	yes

Result: WasmMemberCapacitiesOutput

Result fields

Field	Type	Required	Description
capacity_warnings	string[]		Members the selected design code could not check (unsupported section type/class) - one human-readable line each. The UI must surface these: a missing capacity record means NOT CHECKED, never OK.
member_capacities	WasmMemberCapacity[]	yes

modal_time_history_analysis

Modal time-history analysis under a ground acceleration record.

modal_time_history_analysis(json_input: &str) -> String

Input json_input: WasmTimeHistoryInput

Field	Type	Required	Description
damping_ratio	number		Default: 0.05.
direction	number[]		Direction vector [dx, dy, dz] Default: [1,0,0].
model	WasmModel	yes
n_modes	integer		Default: 10.
record	number[][]	yes	Ground motion record: [[time_s, accel_m_s2], ...]

Result: WasmTimeHistoryResult

Result fields

Field	Type	Required	Description
dt	number	yes
n_modes	integer	yes
n_steps	integer	yes
peakBaseShearX	number	yes
peakBaseShearY	number	yes
peakBaseShearZ	number	yes
peak_displacements	WasmNodeDisplacement[]	yes

moving_load_effect

Moving-load effect of an axle train over a single-span beam's influence line.

moving_load_effect(json_input: &str) -> String

Input json_input: WasmMovingLoadInput

Field	Type	Required	Description
action	string	yes
n_points	integer	yes
span	number	yes
station	number	yes
support_type	string	yes
vehicle	WasmVehicle	yes

Result: WasmMovingLoadResult

Result fields

Field	Type	Required	Description
critical_position_max	number	yes
critical_position_min	number	yes
max_value	number	yes
min_value	number	yes

response_spectrum_analysis

Response spectrum analysis: modal responses combined by SRSS or CQC.

response_spectrum_analysis(json_input: &str) -> String

Input json_input: WasmResponseSpectrumInput

Field	Type	Required	Description
combination_method	string		Default: "SRSS".
damping_ratio	number		Default: 0.05.
direction	string	yes
model	WasmModel	yes
n_modes	integer		Default: 10.
spectrum_points	number[][]	yes	Spectrum points as [[period_s, accel_m_s2], ...]

Result: WasmResponseSpectrumResult

Result fields

Field	Type	Required	Description
combination_method	string	yes
combined_base_shear	number	yes
combined_displacements	WasmNodeDisplacement[]	yes
damping_ratio	number	yes
direction	string	yes
mode_responses	WasmModeResponse[]	yes
total_effective_mass	number	yes
total_mass	number	yes

session_create

Create a reanalysis session for the given model + first load case and cache its factored LDL^T under a fresh session id. Returns {"session_id": u32} on success. Returns an error JSON (e.g. the model has T/C members, non-zero settlement, or is not in the sparse regime) when the session cannot be created; the caller must fall back to a full solve in that case, never treat this as fatal.

session_create(json_input: &str) -> String

Input json_input: WasmSolveInput

Field	Type	Required	Description
model	WasmModel	yes
options	WasmSolveOptions		Default: {"extrapolate_plate_results":false,"n_stations":11,"smooth_plate_nodal_results":false,"station_output":"objects"}.

Result: untyped (JSON built with json!, no Rust type)

session_free

Free a cached reanalysis session. A no-op (not an error) if session_id does not exist, since the JS side may call this defensively.

session_free(session_id: u32) -> void

Result: untyped (returns (), not JSON)

session_resolve_loads

Milestone A: resolve a load change (nodal/member/plate loads, self-weight factor) against a cached session's factored K. Returns the SAME result JSON shape as solve_model_with_options, or an error JSON. Defence in depth: before reusing the cached factor, verifies the sent model is structurally identical to the one the session was created for (ReanalysisSession::structural_matches_loads). A client-side change classifier gap therefore degrades to an explicit error (caller falls back to a full solve), never a silently wrong reuse.

session_resolve_loads(session_id: u32, json_input: &str) -> String

Input json_input: WasmSolveInput

Field	Type	Required	Description
model	WasmModel	yes
options	WasmSolveOptions		Default: {"extrapolate_plate_results":false,"n_stations":11,"smooth_plate_nodal_results":false,"station_output":"objects"}.

Result: WasmResults

Result fields

Field	Type	Required	Description
auto_restrained	WasmSingularDof[]		Zero-stiffness DOFs auto-restrained so the model could solve (aggregated across load cases, de-duplicated). Empty/omitted for a clean model.
combinations	WasmCombinationResults[]
combo_stations_omitted	boolean		The combinations carry no station forces (a large job; see COMBO_STATION_LIMIT). Their stations are the factored sum of their load cases' - the studio rebuilds them on demand.
conditioning	WasmSoftDof[]		Free DOFs left "soft" (tiny but non-zero diagonal stiffness) after auto-restrain - the model solved but is near-singular here, so results may be unreliable (aggregated across load cases, keeping the worst stiffness ratio per node/dof). Empty/omitted for a well-conditioned model.
envelope	WasmEnvelopeResults | null
load_cases	WasmLoadCaseResults[]	yes

session_resolve_loads_typed

session_resolve_loads across the seam as OBJECTS: the model arrives as a JS value (no main-thread stringify) and the results leave as one (no Rust-side string serialize, no JS-side parse). Errors REJECT with the same error-envelope JSON string the string export returns, because solveflow.js already reads parsed.error out of that envelope on the string path and its catch treats any throw as "fall back to a full solve". Same text, same fallback, either way.

session_resolve_loads_typed(session_id: u32, model: JsValue, options: JsValue) -> Result<JsValue, JsValue>

Result: untyped (returns Result<JsValue, JsValue>, not JSON)

session_resolve_member

Milestone B: resolve a single member's section change against a cached session's factored K via a Woodbury update. Returns the same result JSON shape as solve_model_with_options, or an error JSON. Defence in depth: verifies the sent model differs from the session's model in EXACTLY member_id's section assignment (ReanalysisSession::structural_matches_member_change) before reusing the cached factor.

session_resolve_member(session_id: u32, member_id: i32, json_input: &str) -> String

Input json_input: WasmSolveInput

Field	Type	Required	Description
model	WasmModel	yes
options	WasmSolveOptions		Default: {"extrapolate_plate_results":false,"n_stations":11,"smooth_plate_nodal_results":false,"station_output":"objects"}.

Result: WasmResults

Result fields

Field	Type	Required	Description
auto_restrained	WasmSingularDof[]		Zero-stiffness DOFs auto-restrained so the model could solve (aggregated across load cases, de-duplicated). Empty/omitted for a clean model.
combinations	WasmCombinationResults[]
combo_stations_omitted	boolean		The combinations carry no station forces (a large job; see COMBO_STATION_LIMIT). Their stations are the factored sum of their load cases' - the studio rebuilds them on demand.
conditioning	WasmSoftDof[]		Free DOFs left "soft" (tiny but non-zero diagonal stiffness) after auto-restrain - the model solved but is near-singular here, so results may be unreliable (aggregated across load cases, keeping the worst stiffness ratio per node/dof). Empty/omitted for a well-conditioned model.
envelope	WasmEnvelopeResults | null
load_cases	WasmLoadCaseResults[]	yes

session_resolve_member_typed

session_resolve_member across the seam as OBJECTS. See session_resolve_loads_typed for the transport and error contract.

session_resolve_member_typed(session_id: u32, member_id: i32, model: JsValue, options: JsValue) -> Result<JsValue, JsValue>

Result: untyped (returns Result<JsValue, JsValue>, not JSON)

solve_model

Linear static analysis of the model for every load case and combination.

solve_model(json_input: &str) -> String

Input json_input: WasmModel

Field	Type	Required	Description
cables	WasmCable[]		Per-cable-member settings for the 3D nonlinear path (ADR 0013 Step 1): which model ("chord" | "catenary") and the optional unstressed length in metres. Default: [].
design_code	string		Design code for member capacity checks: "AS4100" (default), "AISC360", "EC3". Default: "AS4100".
diaphragms	WasmDiaphragm[]		Default: [].
double_angle_connectors	DoubleAngleConnectors[]		Double-angle interconnectors (SA-156) - see model::DoubleAngleConnectors; the core type's own serde shape is the wire shape. Default: [].
end_gaps	WasmEndGap[]		Member-end gaps (ADR 0013 Step 2): { member_id, gap_mm } on truss / compression-only members. Default: [].
load_cases	WasmLoadCase[]	yes
load_combinations	WasmLoadCombination[]		Default: [].
materials	WasmMaterial[]	yes
member_loads	WasmMemberLoad[]	yes
members	WasmMember[]	yes
nodal_loads	WasmNodalLoad[]	yes
nodes	WasmNode[]	yes
plate_loads	WasmPlateLoad[]		Default: [].
plate_orthotropy	PlateOrthotropy[]		Orthotropic plates: { plate_id, axis: [x, y, z], input: { kind: "material", e1, e2, g12, nu12, g13, g23 } | { kind: "rigidities", a11, a22, a12, a66, d11, d22, d12, d66, s13, s23 } }. The core type's own serde shape is the wire shape; see model::PlateOrthotropy. Default: [].
plates	WasmPlate[]		Default: [].
sections	WasmSection[]	yes
shear_centre_loaded	integer[]		Member ids loaded at the shear centre rather than on the top flange (the default) - see model::Model::shear_centre_loaded. Default: [].

Result: WasmResults

Result fields

Field	Type	Required	Description
auto_restrained	WasmSingularDof[]		Zero-stiffness DOFs auto-restrained so the model could solve (aggregated across load cases, de-duplicated). Empty/omitted for a clean model.
combinations	WasmCombinationResults[]
combo_stations_omitted	boolean		The combinations carry no station forces (a large job; see COMBO_STATION_LIMIT). Their stations are the factored sum of their load cases' - the studio rebuilds them on demand.
conditioning	WasmSoftDof[]		Free DOFs left "soft" (tiny but non-zero diagonal stiffness) after auto-restrain - the model solved but is near-singular here, so results may be unreliable (aggregated across load cases, keeping the worst stiffness ratio per node/dof). Empty/omitted for a well-conditioned model.
envelope	WasmEnvelopeResults | null
load_cases	WasmLoadCaseResults[]	yes

solve_model_buckling

Elastic buckling (eigenvalue) analysis of one load case for the given number of modes.

solve_model_buckling(json_input: &str, load_case_id: i32, n_modes: usize) -> String

Input json_input: WasmModel

Field	Type	Required	Description
cables	WasmCable[]		Per-cable-member settings for the 3D nonlinear path (ADR 0013 Step 1): which model ("chord" | "catenary") and the optional unstressed length in metres. Default: [].
design_code	string		Design code for member capacity checks: "AS4100" (default), "AISC360", "EC3". Default: "AS4100".
diaphragms	WasmDiaphragm[]		Default: [].
double_angle_connectors	DoubleAngleConnectors[]		Double-angle interconnectors (SA-156) - see model::DoubleAngleConnectors; the core type's own serde shape is the wire shape. Default: [].
end_gaps	WasmEndGap[]		Member-end gaps (ADR 0013 Step 2): { member_id, gap_mm } on truss / compression-only members. Default: [].
load_cases	WasmLoadCase[]	yes
load_combinations	WasmLoadCombination[]		Default: [].
materials	WasmMaterial[]	yes
member_loads	WasmMemberLoad[]	yes
members	WasmMember[]	yes
nodal_loads	WasmNodalLoad[]	yes
nodes	WasmNode[]	yes
plate_loads	WasmPlateLoad[]		Default: [].
plate_orthotropy	PlateOrthotropy[]		Orthotropic plates: { plate_id, axis: [x, y, z], input: { kind: "material", e1, e2, g12, nu12, g13, g23 } | { kind: "rigidities", a11, a22, a12, a66, d11, d22, d12, d66, s13, s23 } }. The core type's own serde shape is the wire shape; see model::PlateOrthotropy. Default: [].
plates	WasmPlate[]		Default: [].
sections	WasmSection[]	yes
shear_centre_loaded	integer[]		Member ids loaded at the shear centre rather than on the top flange (the default) - see model::Model::shear_centre_loaded. Default: [].

Result: WasmBucklingResults

Result fields

Field	Type	Required	Description
modes	WasmBucklingMode[]	yes
warnings	string[]		Eigensolver self-check notes (Sturm-count mismatch). Non-empty means the mode set is suspect and the UI must show it.

solve_model_modal

Modal (free vibration) analysis for the given number of modes, lumped mass.

solve_model_modal(json_input: &str, n_modes: usize) -> String

Input json_input: WasmModel

Field	Type	Required	Description
cables	WasmCable[]		Per-cable-member settings for the 3D nonlinear path (ADR 0013 Step 1): which model ("chord" | "catenary") and the optional unstressed length in metres. Default: [].
design_code	string		Design code for member capacity checks: "AS4100" (default), "AISC360", "EC3". Default: "AS4100".
diaphragms	WasmDiaphragm[]		Default: [].
double_angle_connectors	DoubleAngleConnectors[]		Double-angle interconnectors (SA-156) - see model::DoubleAngleConnectors; the core type's own serde shape is the wire shape. Default: [].
end_gaps	WasmEndGap[]		Member-end gaps (ADR 0013 Step 2): { member_id, gap_mm } on truss / compression-only members. Default: [].
load_cases	WasmLoadCase[]	yes
load_combinations	WasmLoadCombination[]		Default: [].
materials	WasmMaterial[]	yes
member_loads	WasmMemberLoad[]	yes
members	WasmMember[]	yes
nodal_loads	WasmNodalLoad[]	yes
nodes	WasmNode[]	yes
plate_loads	WasmPlateLoad[]		Default: [].
plate_orthotropy	PlateOrthotropy[]		Orthotropic plates: { plate_id, axis: [x, y, z], input: { kind: "material", e1, e2, g12, nu12, g13, g23 } | { kind: "rigidities", a11, a22, a12, a66, d11, d22, d12, d66, s13, s23 } }. The core type's own serde shape is the wire shape; see model::PlateOrthotropy. Default: [].
plates	WasmPlate[]		Default: [].
sections	WasmSection[]	yes
shear_centre_loaded	integer[]		Member ids loaded at the shear centre rather than on the top flange (the default) - see model::Model::shear_centre_loaded. Default: [].

Result: WasmModalResults

Result fields

Field	Type	Required	Description
modes	WasmModalMode[]	yes
warnings	string[]		Eigensolver self-check notes (Sturm-count mismatch, low seismic mass participation). Non-empty means the mode set is suspect.

solve_model_modal_with_options

Modal analysis with options (mass type, number of modes).

solve_model_modal_with_options(json_input: &str) -> String

Input json_input: WasmModalInput

Field	Type	Required	Description
model	WasmModel	yes
options	WasmModalOptions		Default: {"mass_matrix":"","n_modes":0}.

Result: WasmModel

Result fields

Field	Type	Required	Description
cables	WasmCable[]		Per-cable-member settings for the 3D nonlinear path (ADR 0013 Step 1): which model ("chord" | "catenary") and the optional unstressed length in metres. Default: [].
design_code	string		Design code for member capacity checks: "AS4100" (default), "AISC360", "EC3". Default: "AS4100".
diaphragms	WasmDiaphragm[]		Default: [].
double_angle_connectors	DoubleAngleConnectors[]		Double-angle interconnectors (SA-156) - see model::DoubleAngleConnectors; the core type's own serde shape is the wire shape. Default: [].
end_gaps	WasmEndGap[]		Member-end gaps (ADR 0013 Step 2): { member_id, gap_mm } on truss / compression-only members. Default: [].
load_cases	WasmLoadCase[]	yes
load_combinations	WasmLoadCombination[]		Default: [].
materials	WasmMaterial[]	yes
member_loads	WasmMemberLoad[]	yes
members	WasmMember[]	yes
nodal_loads	WasmNodalLoad[]	yes
nodes	WasmNode[]	yes
plate_loads	WasmPlateLoad[]		Default: [].
plate_orthotropy	PlateOrthotropy[]		Orthotropic plates: { plate_id, axis: [x, y, z], input: { kind: "material", e1, e2, g12, nu12, g13, g23 } | { kind: "rigidities", a11, a22, a12, a66, d11, d22, d12, d66, s13, s23 } }. The core type's own serde shape is the wire shape; see model::PlateOrthotropy. Default: [].
plates	WasmPlate[]		Default: [].
sections	WasmSection[]	yes
shear_centre_loaded	integer[]		Member ids loaded at the shear centre rather than on the top flange (the default) - see model::Model::shear_centre_loaded. Default: [].

solve_model_nonlinear

Planar geometric-nonlinear (large-displacement) static analysis. Returns the load-displacement path as { "steps": [ { "lambda", "node_disp": [[h,v,rot]..] } ] } where node_disp is per node, in the model's principal plane. Frame (beam) elements in a single plane, elastic material (v1).

solve_model_nonlinear(json_input: &str, load_case_id: i32, n_steps: usize, max_iterations: usize, tolerance: f64) -> String

Input json_input: WasmModel

Field	Type	Required	Description
cables	WasmCable[]		Per-cable-member settings for the 3D nonlinear path (ADR 0013 Step 1): which model ("chord" | "catenary") and the optional unstressed length in metres. Default: [].
design_code	string		Design code for member capacity checks: "AS4100" (default), "AISC360", "EC3". Default: "AS4100".
diaphragms	WasmDiaphragm[]		Default: [].
double_angle_connectors	DoubleAngleConnectors[]		Double-angle interconnectors (SA-156) - see model::DoubleAngleConnectors; the core type's own serde shape is the wire shape. Default: [].
end_gaps	WasmEndGap[]		Member-end gaps (ADR 0013 Step 2): { member_id, gap_mm } on truss / compression-only members. Default: [].
load_cases	WasmLoadCase[]	yes
load_combinations	WasmLoadCombination[]		Default: [].
materials	WasmMaterial[]	yes
member_loads	WasmMemberLoad[]	yes
members	WasmMember[]	yes
nodal_loads	WasmNodalLoad[]	yes
nodes	WasmNode[]	yes
plate_loads	WasmPlateLoad[]		Default: [].
plate_orthotropy	PlateOrthotropy[]		Orthotropic plates: { plate_id, axis: [x, y, z], input: { kind: "material", e1, e2, g12, nu12, g13, g23 } | { kind: "rigidities", a11, a22, a12, a66, d11, d22, d12, d66, s13, s23 } }. The core type's own serde shape is the wire shape; see model::PlateOrthotropy. Default: [].
plates	WasmPlate[]		Default: [].
sections	WasmSection[]	yes
shear_centre_loaded	integer[]		Member ids loaded at the shear centre rather than on the top flange (the default) - see model::Model::shear_centre_loaded. Default: [].

Result: untyped (JSON built with json!, no Rust type)

solve_model_nonlinear_3d

Large-displacement static analysis of a SPATIAL frame - ADR 0008 step 2. Same options object as solve_model_nonlinear_with_options and the same per-step result shape, so the capacity-curve panel and the report page need no second renderer. Two differences, both forced by the physics rather than chosen: * node_disp carries SIX components per node ([ux,uy,uz,rx,ry,rz]) instead of three; * plane is absent, because there isn't one. path is "3d" here and "planar" there, so a caller can always say which ran.

solve_model_nonlinear_3d(json_input: &str, options_json: &str) -> String

Input json_input: WasmModel

Field	Type	Required	Description
cables	WasmCable[]		Per-cable-member settings for the 3D nonlinear path (ADR 0013 Step 1): which model ("chord" | "catenary") and the optional unstressed length in metres. Default: [].
design_code	string		Design code for member capacity checks: "AS4100" (default), "AISC360", "EC3". Default: "AS4100".
diaphragms	WasmDiaphragm[]		Default: [].
double_angle_connectors	DoubleAngleConnectors[]		Double-angle interconnectors (SA-156) - see model::DoubleAngleConnectors; the core type's own serde shape is the wire shape. Default: [].
end_gaps	WasmEndGap[]		Member-end gaps (ADR 0013 Step 2): { member_id, gap_mm } on truss / compression-only members. Default: [].
load_cases	WasmLoadCase[]	yes
load_combinations	WasmLoadCombination[]		Default: [].
materials	WasmMaterial[]	yes
member_loads	WasmMemberLoad[]	yes
members	WasmMember[]	yes
nodal_loads	WasmNodalLoad[]	yes
nodes	WasmNode[]	yes
plate_loads	WasmPlateLoad[]		Default: [].
plate_orthotropy	PlateOrthotropy[]		Orthotropic plates: { plate_id, axis: [x, y, z], input: { kind: "material", e1, e2, g12, nu12, g13, g23 } | { kind: "rigidities", a11, a22, a12, a66, d11, d22, d12, d66, s13, s23 } }. The core type's own serde shape is the wire shape; see model::PlateOrthotropy. Default: [].
plates	WasmPlate[]		Default: [].
sections	WasmSection[]	yes
shear_centre_loaded	integer[]		Member ids loaded at the shear centre rather than on the top flange (the default) - see model::Model::shear_centre_loaded. Default: [].

Input options_json: WasmNlOptions

Field	Type	Required	Description
control	string		Default: "".
ds	number | null
fibers	integer		Default: 16.
fy	number | null
hardening	number		Default: 0.
load_case_id	integer		Default: 0.
material	string		Default: "".
max_iterations	integer		Default: 60.
n_steps	integer		Default: 20.
tolerance	number		Default: 0.000001.

Result: untyped (JSON built with json!, no Rust type)

solve_model_nonlinear_with_options

Planar nonlinear static analysis with material and control options. Options JSON: { load_case_id, n_steps, max_iterations, tolerance, material: "elastic"|"plastic", fy?, fibers, hardening, control: "load"|"arc", ds? }. Returns { steps:[{lambda,node_disp,n_iter}], limit_lambda, terminated: "steps"|"limit"|"collapse", note, material, control, plane:[h,v,o] } or the usual error envelope.

solve_model_nonlinear_with_options(json_input: &str, options_json: &str) -> String

Input json_input: WasmModel

Field	Type	Required	Description
cables	WasmCable[]		Per-cable-member settings for the 3D nonlinear path (ADR 0013 Step 1): which model ("chord" | "catenary") and the optional unstressed length in metres. Default: [].
design_code	string		Design code for member capacity checks: "AS4100" (default), "AISC360", "EC3". Default: "AS4100".
diaphragms	WasmDiaphragm[]		Default: [].
double_angle_connectors	DoubleAngleConnectors[]		Double-angle interconnectors (SA-156) - see model::DoubleAngleConnectors; the core type's own serde shape is the wire shape. Default: [].
end_gaps	WasmEndGap[]		Member-end gaps (ADR 0013 Step 2): { member_id, gap_mm } on truss / compression-only members. Default: [].
load_cases	WasmLoadCase[]	yes
load_combinations	WasmLoadCombination[]		Default: [].
materials	WasmMaterial[]	yes
member_loads	WasmMemberLoad[]	yes
members	WasmMember[]	yes
nodal_loads	WasmNodalLoad[]	yes
nodes	WasmNode[]	yes
plate_loads	WasmPlateLoad[]		Default: [].
plate_orthotropy	PlateOrthotropy[]		Orthotropic plates: { plate_id, axis: [x, y, z], input: { kind: "material", e1, e2, g12, nu12, g13, g23 } | { kind: "rigidities", a11, a22, a12, a66, d11, d22, d12, d66, s13, s23 } }. The core type's own serde shape is the wire shape; see model::PlateOrthotropy. Default: [].
plates	WasmPlate[]		Default: [].
sections	WasmSection[]	yes
shear_centre_loaded	integer[]		Member ids loaded at the shear centre rather than on the top flange (the default) - see model::Model::shear_centre_loaded. Default: [].

Input options_json: WasmNlOptions

Field	Type	Required	Description
control	string		Default: "".
ds	number | null
fibers	integer		Default: 16.
fy	number | null
hardening	number		Default: 0.
load_case_id	integer		Default: 0.
material	string		Default: "".
max_iterations	integer		Default: 60.
n_steps	integer		Default: 20.
tolerance	number		Default: 0.000001.

Result: untyped (JSON built with json!, no Rust type)

solve_model_pdelta

P-Delta (second-order) analysis of the model, iterating up to the given count.

solve_model_pdelta(json_input: &str, max_iterations: usize, tolerance: f64) -> String

Input json_input: WasmModel

Field	Type	Required	Description
cables	WasmCable[]		Per-cable-member settings for the 3D nonlinear path (ADR 0013 Step 1): which model ("chord" | "catenary") and the optional unstressed length in metres. Default: [].
design_code	string		Design code for member capacity checks: "AS4100" (default), "AISC360", "EC3". Default: "AS4100".
diaphragms	WasmDiaphragm[]		Default: [].
double_angle_connectors	DoubleAngleConnectors[]		Double-angle interconnectors (SA-156) - see model::DoubleAngleConnectors; the core type's own serde shape is the wire shape. Default: [].
end_gaps	WasmEndGap[]		Member-end gaps (ADR 0013 Step 2): { member_id, gap_mm } on truss / compression-only members. Default: [].
load_cases	WasmLoadCase[]	yes
load_combinations	WasmLoadCombination[]		Default: [].
materials	WasmMaterial[]	yes
member_loads	WasmMemberLoad[]	yes
members	WasmMember[]	yes
nodal_loads	WasmNodalLoad[]	yes
nodes	WasmNode[]	yes
plate_loads	WasmPlateLoad[]		Default: [].
plate_orthotropy	PlateOrthotropy[]		Orthotropic plates: { plate_id, axis: [x, y, z], input: { kind: "material", e1, e2, g12, nu12, g13, g23 } | { kind: "rigidities", a11, a22, a12, a66, d11, d22, d12, d66, s13, s23 } }. The core type's own serde shape is the wire shape; see model::PlateOrthotropy. Default: [].
plates	WasmPlate[]		Default: [].
sections	WasmSection[]	yes
shear_centre_loaded	integer[]		Member ids loaded at the shear centre rather than on the top flange (the default) - see model::Model::shear_centre_loaded. Default: [].

Result: WasmResults

Result fields

Field	Type	Required	Description
auto_restrained	WasmSingularDof[]		Zero-stiffness DOFs auto-restrained so the model could solve (aggregated across load cases, de-duplicated). Empty/omitted for a clean model.
combinations	WasmCombinationResults[]
combo_stations_omitted	boolean		The combinations carry no station forces (a large job; see COMBO_STATION_LIMIT). Their stations are the factored sum of their load cases' - the studio rebuilds them on demand.
conditioning	WasmSoftDof[]		Free DOFs left "soft" (tiny but non-zero diagonal stiffness) after auto-restrain - the model solved but is near-singular here, so results may be unreliable (aggregated across load cases, keeping the worst stiffness ratio per node/dof). Empty/omitted for a well-conditioned model.
envelope	WasmEnvelopeResults | null
load_cases	WasmLoadCaseResults[]	yes

solve_model_pdelta_with_options

P-Delta analysis with solver options.

solve_model_pdelta_with_options(json_input: &str) -> String

Input json_input: WasmSolveInput

Field	Type	Required	Description
model	WasmModel	yes
options	WasmSolveOptions		Default: {"extrapolate_plate_results":false,"n_stations":11,"smooth_plate_nodal_results":false,"station_output":"objects"}.

Result: WasmResults

Result fields

Field	Type	Required	Description
auto_restrained	WasmSingularDof[]		Zero-stiffness DOFs auto-restrained so the model could solve (aggregated across load cases, de-duplicated). Empty/omitted for a clean model.
combinations	WasmCombinationResults[]
combo_stations_omitted	boolean		The combinations carry no station forces (a large job; see COMBO_STATION_LIMIT). Their stations are the factored sum of their load cases' - the studio rebuilds them on demand.
conditioning	WasmSoftDof[]		Free DOFs left "soft" (tiny but non-zero diagonal stiffness) after auto-restrain - the model solved but is near-singular here, so results may be unreliable (aggregated across load cases, keeping the worst stiffness ratio per node/dof). Empty/omitted for a well-conditioned model.
envelope	WasmEnvelopeResults | null
load_cases	WasmLoadCaseResults[]	yes

solve_model_tc

Analysis with tension-only and compression-only members, iterating up to the given count.

solve_model_tc(json_input: &str, max_iterations: usize) -> String

Input json_input: WasmModel

Field	Type	Required	Description
cables	WasmCable[]		Per-cable-member settings for the 3D nonlinear path (ADR 0013 Step 1): which model ("chord" | "catenary") and the optional unstressed length in metres. Default: [].
design_code	string		Design code for member capacity checks: "AS4100" (default), "AISC360", "EC3". Default: "AS4100".
diaphragms	WasmDiaphragm[]		Default: [].
double_angle_connectors	DoubleAngleConnectors[]		Double-angle interconnectors (SA-156) - see model::DoubleAngleConnectors; the core type's own serde shape is the wire shape. Default: [].
end_gaps	WasmEndGap[]		Member-end gaps (ADR 0013 Step 2): { member_id, gap_mm } on truss / compression-only members. Default: [].
load_cases	WasmLoadCase[]	yes
load_combinations	WasmLoadCombination[]		Default: [].
materials	WasmMaterial[]	yes
member_loads	WasmMemberLoad[]	yes
members	WasmMember[]	yes
nodal_loads	WasmNodalLoad[]	yes
nodes	WasmNode[]	yes
plate_loads	WasmPlateLoad[]		Default: [].
plate_orthotropy	PlateOrthotropy[]		Orthotropic plates: { plate_id, axis: [x, y, z], input: { kind: "material", e1, e2, g12, nu12, g13, g23 } | { kind: "rigidities", a11, a22, a12, a66, d11, d22, d12, d66, s13, s23 } }. The core type's own serde shape is the wire shape; see model::PlateOrthotropy. Default: [].
plates	WasmPlate[]		Default: [].
sections	WasmSection[]	yes
shear_centre_loaded	integer[]		Member ids loaded at the shear centre rather than on the top flange (the default) - see model::Model::shear_centre_loaded. Default: [].

Result: WasmResults

Result fields

Field	Type	Required	Description
auto_restrained	WasmSingularDof[]		Zero-stiffness DOFs auto-restrained so the model could solve (aggregated across load cases, de-duplicated). Empty/omitted for a clean model.
combinations	WasmCombinationResults[]
combo_stations_omitted	boolean		The combinations carry no station forces (a large job; see COMBO_STATION_LIMIT). Their stations are the factored sum of their load cases' - the studio rebuilds them on demand.
conditioning	WasmSoftDof[]		Free DOFs left "soft" (tiny but non-zero diagonal stiffness) after auto-restrain - the model solved but is near-singular here, so results may be unreliable (aggregated across load cases, keeping the worst stiffness ratio per node/dof). Empty/omitted for a well-conditioned model.
envelope	WasmEnvelopeResults | null
load_cases	WasmLoadCaseResults[]	yes

solve_model_tc_with_options

Tension/compression-only analysis with solver options.

solve_model_tc_with_options(json_input: &str) -> String

Input json_input: WasmSolveInput

Field	Type	Required	Description
model	WasmModel	yes
options	WasmSolveOptions		Default: {"extrapolate_plate_results":false,"n_stations":11,"smooth_plate_nodal_results":false,"station_output":"objects"}.

Result: WasmResults

Result fields

Field	Type	Required	Description
auto_restrained	WasmSingularDof[]		Zero-stiffness DOFs auto-restrained so the model could solve (aggregated across load cases, de-duplicated). Empty/omitted for a clean model.
combinations	WasmCombinationResults[]
combo_stations_omitted	boolean		The combinations carry no station forces (a large job; see COMBO_STATION_LIMIT). Their stations are the factored sum of their load cases' - the studio rebuilds them on demand.
conditioning	WasmSoftDof[]		Free DOFs left "soft" (tiny but non-zero diagonal stiffness) after auto-restrain - the model solved but is near-singular here, so results may be unreliable (aggregated across load cases, keeping the worst stiffness ratio per node/dof). Empty/omitted for a well-conditioned model.
envelope	WasmEnvelopeResults | null
load_cases	WasmLoadCaseResults[]	yes

solve_model_time_history_direct

Direct time-history integration of the full model: Newmark-beta or HHT-alpha on the assembled M, C, K (ADR 0013 Step 3). Same summary fields as the modal export plus the tracked node's displacement series, so the dialog renders either the same way.

solve_model_time_history_direct(json_input: &str) -> String

Input json_input: WasmDirectThInput

Field	Type	Required	Description
alpha	number | null		Default: null.
beta	number | null		Default: null.
damping_ratio	number		Default: 0.05.
direction	number[]		Default: [1,0,0].
gamma	number | null		Default: null.
model	WasmModel	yes
nonlinear	boolean		Default: false.
rayleigh	number[] | null		Default: null.
record	number[][]	yes
scheme	string		Default: "".
track_node	integer | null		Default: null.

Result: untyped (JSON built with json!, no Rust type)

solve_model_typed

ADR 0004 phase 3, first increment: typed-boundary companion to solve_model_with_options. Takes the model and options as structured JS objects (serde_wasm_bindgen - no main-thread JSON.stringify before dispatch) and returns the results as a structured JS object (no Rust-side string serialize). Rejects with the gate's error-summary STRING (the worker's catch stringifies whatever it gets, and the summary is what the UI shows today; the structured violations stay reachable via validate_model). Adopted by solveflow's main solve path when present; the string export remains the fallback and the contract of record.

solve_model_typed(model: JsValue, options: JsValue) -> Result<JsValue, JsValue>

Result: untyped (returns Result<JsValue, JsValue>, not JSON)

solve_model_with_options

Linear static analysis with solver options (the input carries the model and the options).

solve_model_with_options(json_input: &str) -> String

Input json_input: WasmSolveInput

Field	Type	Required	Description
model	WasmModel	yes
options	WasmSolveOptions		Default: {"extrapolate_plate_results":false,"n_stations":11,"smooth_plate_nodal_results":false,"station_output":"objects"}.

Result: WasmResults

Result fields

Field	Type	Required	Description
auto_restrained	WasmSingularDof[]		Zero-stiffness DOFs auto-restrained so the model could solve (aggregated across load cases, de-duplicated). Empty/omitted for a clean model.
combinations	WasmCombinationResults[]
combo_stations_omitted	boolean		The combinations carry no station forces (a large job; see COMBO_STATION_LIMIT). Their stations are the factored sum of their load cases' - the studio rebuilds them on demand.
conditioning	WasmSoftDof[]		Free DOFs left "soft" (tiny but non-zero diagonal stiffness) after auto-restrain - the model solved but is near-singular here, so results may be unreliable (aggregated across load cases, keeping the worst stiffness ratio per node/dof). Empty/omitted for a well-conditioned model.
envelope	WasmEnvelopeResults | null
load_cases	WasmLoadCaseResults[]	yes

solver_error_catalogue

Every SolverError variant the solver can raise, rendered the way solve_model renders it, so the Studio's plain-language table (web_demo/studio/solvererrors.js) can be gated against the producer: a variant added here without a rule in the table turns the gate red, and a rule that no longer matches the wording the engine emits does too. Sample payloads only - the message shape is what the table matches on, not the numbers.

solver_error_catalogue() -> String

Result: any[]

validate_model

ADR 0004 seam gate: validate the SOLVER-PAYLOAD shape (WasmModel) before the JS import path loads it (and, in Phase 2, before the solve exports run). Same Violation envelope as validate_snapshot, so JS parses one error shape across both schema halves. A serde parse failure IS a verdict (the payload does not satisfy the schema) and is returned as an error envelope, not swallowed.

validate_model(model_json: &str) -> String

Input model_json: WasmModel

Field	Type	Required	Description
cables	WasmCable[]		Per-cable-member settings for the 3D nonlinear path (ADR 0013 Step 1): which model ("chord" | "catenary") and the optional unstressed length in metres. Default: [].
design_code	string		Design code for member capacity checks: "AS4100" (default), "AISC360", "EC3". Default: "AS4100".
diaphragms	WasmDiaphragm[]		Default: [].
double_angle_connectors	DoubleAngleConnectors[]		Double-angle interconnectors (SA-156) - see model::DoubleAngleConnectors; the core type's own serde shape is the wire shape. Default: [].
end_gaps	WasmEndGap[]		Member-end gaps (ADR 0013 Step 2): { member_id, gap_mm } on truss / compression-only members. Default: [].
load_cases	WasmLoadCase[]	yes
load_combinations	WasmLoadCombination[]		Default: [].
materials	WasmMaterial[]	yes
member_loads	WasmMemberLoad[]	yes
members	WasmMember[]	yes
nodal_loads	WasmNodalLoad[]	yes
nodes	WasmNode[]	yes
plate_loads	WasmPlateLoad[]		Default: [].
plate_orthotropy	PlateOrthotropy[]		Orthotropic plates: { plate_id, axis: [x, y, z], input: { kind: "material", e1, e2, g12, nu12, g13, g23 } | { kind: "rigidities", a11, a22, a12, a66, d11, d22, d12, d66, s13, s23 } }. The core type's own serde shape is the wire shape; see model::PlateOrthotropy. Default: [].
plates	WasmPlate[]		Default: [].
sections	WasmSection[]	yes
shear_centre_loaded	integer[]		Member ids loaded at the shear centre rather than on the top flange (the default) - see model::Model::shear_centre_loaded. Default: [].

Result: ValidationResult

Result fields

Field	Type	Required	Description
valid	boolean	yes
violations	Violation[]	yes

Model import, export and merge

connection_takeoff

Quantity take-off of the model's connections: plates, bolts and welds.

connection_takeoff(json_input: &str) -> String

Input json_input: WasmModel

Field	Type	Required	Description
cables	WasmCable[]		Per-cable-member settings for the 3D nonlinear path (ADR 0013 Step 1): which model ("chord" | "catenary") and the optional unstressed length in metres. Default: [].
design_code	string		Design code for member capacity checks: "AS4100" (default), "AISC360", "EC3". Default: "AS4100".
diaphragms	WasmDiaphragm[]		Default: [].
double_angle_connectors	DoubleAngleConnectors[]		Double-angle interconnectors (SA-156) - see model::DoubleAngleConnectors; the core type's own serde shape is the wire shape. Default: [].
end_gaps	WasmEndGap[]		Member-end gaps (ADR 0013 Step 2): { member_id, gap_mm } on truss / compression-only members. Default: [].
load_cases	WasmLoadCase[]	yes
load_combinations	WasmLoadCombination[]		Default: [].
materials	WasmMaterial[]	yes
member_loads	WasmMemberLoad[]	yes
members	WasmMember[]	yes
nodal_loads	WasmNodalLoad[]	yes
nodes	WasmNode[]	yes
plate_loads	WasmPlateLoad[]		Default: [].
plate_orthotropy	PlateOrthotropy[]		Orthotropic plates: { plate_id, axis: [x, y, z], input: { kind: "material", e1, e2, g12, nu12, g13, g23 } | { kind: "rigidities", a11, a22, a12, a66, d11, d22, d12, d66, s13, s23 } }. The core type's own serde shape is the wire shape; see model::PlateOrthotropy. Default: [].
plates	WasmPlate[]		Default: [].
sections	WasmSection[]	yes
shear_centre_loaded	integer[]		Member ids loaded at the shear centre rather than on the top flange (the default) - see model::Model::shear_centre_loaded. Default: [].

Result: ConnectionTakeoff

Result fields

Field	Type	Required	Description
connections	Connection[]	yes
totals	ConnectionTotals	yes

export_dwg

Exports the model as a DWG drawing.

export_dwg(json_input: &str) -> Vec<u8>

Input json_input: untyped (no typed parse of this parameter)

Result: untyped (returns Vec<u8>, not JSON)

import_dwg

Imports a DWG drawing (bytes) as model geometry; needs the dwg build feature.

import_dwg(bytes: &[u8]) -> String

Result: untyped (no typed serialisation found)

import_sg_model

Imports a SpaceGass model file (bytes) into the Studio model shape.

import_sg_model(bytes: &[u8]) -> String

Result: SgModel

Result fields

Field	Type	Required	Description
combinations	SgCombination[]	yes
connection_config	ConnectionConfig | null
diagnostics	SgImportDiagnostics	yes
entries	SgEntryInfo[]	yes
load_cases	SgLoadCase[]	yes
materials	SgMaterial[]	yes
member_loads	SgMemberLoad[]	yes
member_offsets	SgMemberOffset[]	yes
member_point_loads	SgMemberPointLoad[]	yes
members	SgMember[]	yes
nodal_loads	SgNodalLoad[]	yes
nodes	SgNode[]	yes
plate_loads	SgPlateLoad[]	yes
plates	SgPlate[]	yes
restraints	SgRestraint[]	yes
section_info	SgSectionInfo | null
sections	SgSection[]	yes
self_weights	SgSelfWeight[]	yes

list_sg_entries

Lists the entries in a SpaceGass file (bytes) without importing them.

list_sg_entries(bytes: &[u8]) -> String

Result: SgEntryInfo[]

merge_snapshots

Three-way merge of model snapshots (base, ours, theirs); returns the merged snapshot and any conflicts.

merge_snapshots(base_json: &str, ours_json: &str, theirs_json: &str) -> String

Input base_json: untyped (no typed parse of this parameter)

Input ours_json: untyped (no typed parse of this parameter)

Input theirs_json: untyped (no typed parse of this parameter)

Result: untyped (no typed serialisation found)

quantity_takeoff

Quantity take-off of the model: member lengths, masses and counts by section.

quantity_takeoff(json_input: &str) -> String

Input json_input: WasmModel

Field	Type	Required	Description
cables	WasmCable[]		Per-cable-member settings for the 3D nonlinear path (ADR 0013 Step 1): which model ("chord" | "catenary") and the optional unstressed length in metres. Default: [].
design_code	string		Design code for member capacity checks: "AS4100" (default), "AISC360", "EC3". Default: "AS4100".
diaphragms	WasmDiaphragm[]		Default: [].
double_angle_connectors	DoubleAngleConnectors[]		Double-angle interconnectors (SA-156) - see model::DoubleAngleConnectors; the core type's own serde shape is the wire shape. Default: [].
end_gaps	WasmEndGap[]		Member-end gaps (ADR 0013 Step 2): { member_id, gap_mm } on truss / compression-only members. Default: [].
load_cases	WasmLoadCase[]	yes
load_combinations	WasmLoadCombination[]		Default: [].
materials	WasmMaterial[]	yes
member_loads	WasmMemberLoad[]	yes
members	WasmMember[]	yes
nodal_loads	WasmNodalLoad[]	yes
nodes	WasmNode[]	yes
plate_loads	WasmPlateLoad[]		Default: [].
plate_orthotropy	PlateOrthotropy[]		Orthotropic plates: { plate_id, axis: [x, y, z], input: { kind: "material", e1, e2, g12, nu12, g13, g23 } | { kind: "rigidities", a11, a22, a12, a66, d11, d22, d12, d66, s13, s23 } }. The core type's own serde shape is the wire shape; see model::PlateOrthotropy. Default: [].
plates	WasmPlate[]		Default: [].
sections	WasmSection[]	yes
shear_centre_loaded	integer[]		Member ids loaded at the shear centre rather than on the top flange (the default) - see model::Model::shear_centre_loaded. Default: [].

Result: TakeoffReport

Result fields

Field	Type	Required	Description
bySection	SectionRollup[]	yes	Per-section roll-ups, heaviest first.
lines	TakeoffLine[]	yes	Per-member lines, in model order.
plates	PlateTakeoff[]	yes	Plate take-off lines.
totals	TakeoffTotals	yes	Grand totals.

validate_snapshot

Validates a canonical model snapshot and returns the violations found (ADR 0004).

validate_snapshot(snapshot_json: &str) -> String

Input snapshot_json: untyped (no typed parse of this parameter)

Result: untyped (no typed serialisation found)

Sections

section_properties

Section properties of a polygonal section outline (area, centroid, second moments, moduli).

section_properties(json_input: &str) -> String

Input json_input: WasmSectionBuilderInput

Field	Type	Required	Description
loops	WasmPoint2[][]	yes

Result: WasmSectionBuilderResult

Result fields

Field	Type	Required	Description
Asx	number	yes
Asy	number	yes
I1	number	yes
I2	number	yes
Ip	number	yes
Iw	number	yes
Ixx	number	yes
Ixy	number	yes
Iyy	number	yes
Japprox	number	yes
Jopen	number	yes
Sx	number	yes
Sy	number	yes
Zxapprox	number	yes
Zyapprox	number	yes
area	number	yes
cx	number	yes
cy	number	yes
rx	number	yes
ry	number	yes
thetaP	number	yes

section_props_from_dims

Verified parametric section properties from catalogue dimensions (mm), in the SI shape the JS analysis layer consumes: a (m2), izz=major-axis I (m4), iyy=minor-axis I (m4), j=torsion constant (m4), plus zx/zy/sx/sy/iw/rx/ry. Builds the polygon per family in fem-core and runs the verified integrator - the single source of truth replacing the JS Iy/J approximations. Optional catalogue overrides (area_mm2, lipLength_mm, J_mm4, Iw_mm6, Ix_mm4, Zx_mm3) are forwarded to the builder so families such as cold-formed Cee/Zed use published values where available.

section_props_from_dims(json_input: &str) -> String

Input json_input: WasmSectionDimsInput

Field	Type	Required	Description
Iw_mm6	number		Default: 0.
Ix_mm4	number		Default: 0.
Iy_mm4	number		Default: 0.
J_mm4	number		Default: 0.
Zx_mm3	number		Default: 0.
area_mm2	number		Default: 0.
category	string	yes
depth_mm	number	yes
flangeThickness_mm	number		Default: 0.
flangeWidth_mm	number	yes
lipLength_mm	number		Default: 0.
name	string		Default: "".
webThickness_mm	number	yes

Result: any

Steel - AS 4100

as4100_alpha_b

AS 4100 member section constant alpha_b (Table 6.3.3) for a section name.

as4100_alpha_b(section_name: &str) -> f64

Input section_name: untyped (no typed parse of this parameter)

Result: untyped (returns f64, not JSON)

as4100_alpha_m

AS 4100 moment modification factor alpha_m (Cl 5.6.1.1).

as4100_alpha_m(json_input: &str) -> String

Input json_input: WasmAs4100AlphaMInput

Field	Type	Required	Description
my1	number	yes
my2	number	yes

Result: WasmAs4100AlphaMResult

Result fields

Field	Type	Required	Description
alpha_m	number	yes

as4100_cellular_check

Cellular or castellated beam check to AS 4100 (first-pass geometry and capacities).

as4100_cellular_check(json_input: &str) -> String

Input json_input: WasmAs4100CellularInput

Field	Type	Required	Description
alpha_b	number		Default: 0.
alpha_m_case	integer	yes
b_f_mm	number	yes
d_mm	number	yes
d_o_mm	number	yes
fy_mpa	number	yes
le_mm	number	yes
length_mm	number	yes
s_mm	number	yes
t_f_mm	number	yes
t_w_mm	number	yes

Result: WasmAs4100CellularResult

Result fields

Field	Type	Required	Description
phi_m_b	number	yes
phi_m_gross	number	yes
phi_m_net	number	yes
phi_m_vierendeel	number	yes
phi_v_net	number	yes
phi_v_web_post	number	yes
web_post_slenderness	number	yes

as4100_combined

AS 4100 combined actions check: section and member capacity under axial force and bending (Section 8).

as4100_combined(json_input: &str) -> String

Input json_input: WasmAs4100CombinedInput

Field	Type	Required	Description
kf	number		Default: 1.
m_star_x	number	yes
m_star_y	number		Default: 0.
n_star	number	yes
ns	number	yes
phi_mbx	number	yes
phi_mby	number		Default: 0.
phi_msx	number	yes
phi_msy	number		Default: 0.
phi_ncx	number	yes
phi_ncy	number	yes
phi_nt	number	yes
section_class	string	yes

Result: WasmAs4100CombinedResult

Result fields

Field	Type	Required	Description
axial_util	number	yes
member_util_x	number	yes
member_util_y	number	yes
phi_m_ox	number	yes
phi_m_oy	number	yes
phi_m_rx	number	yes
phi_m_ry	number	yes
section_util_x	number	yes
section_util_y	number	yes
util_biaxial_member	number	yes
util_biaxial_section	number	yes
util_max	number	yes

as4100_fatigue_check

AS 4100 Section 11 fatigue check for a detail category and stress range.

as4100_fatigue_check(json_input: &str) -> String

Input json_input: WasmAs4100FatigueInput

Field	Type	Required	Description
apply_beta_tf	boolean		Default: false.
category	string	yes
fy_mpa	number	yes
phi	number		Default: 0.9.
spectrum	[number, number][]	yes
t_mm	number	yes

Result: WasmAs4100FatigueResult

Result fields

Field	Type	Required	Description
applicable	boolean	yes
damage	number	yes
ok	boolean	yes

as4100_fire_check

AS 4100 Section 12 fire check: limiting temperature and time for an unprotected member.

as4100_fire_check(json_input: &str) -> String

Input json_input: WasmAs4100FireInput

Field	Type	Required	Description
ambient_capacity	number	yes
exposure	string	yes
fire_demand	number	yes
section_factor	number	yes
time_min	number	yes

Result: WasmAs4100FireResult

Result fields

Field	Type	Required	Description
limiting_temp	number	yes
load_ratio	number	yes
ok	boolean	yes
steel_temp	number	yes
temp_margin	number	yes

as4100_notional_force

AS 4100 Cl 3.2.4 notional horizontal force at a floor level (multi-storey buildings).

as4100_notional_force(json_input: &str) -> String

Input json_input: WasmNotionalInput

Field	Type	Required	Description
adequately_braced	boolean		Legacy input from before the 2020 edition's single factor; accepted and ignored. Default: false.
multi_storey	boolean		AS 4100 Cl 3.2.4 applies to multi-storey buildings only. Default true. Default: true.
total_gravity_load	number	yes	Total design vertical load applied at the floor level (N).

Result: WasmNotionalResult

Result fields

Field	Type	Required	Description
force	number	yes

as4100_optimize_section

Finds the lightest catalogue section that passes AS 4100 for the given actions.

as4100_optimize_section(json_input: &str) -> String

Input json_input: WasmAs4100OptimizeInput

Field	Type	Required	Description
alpha_b	number		Default: 0.
alpha_m_case	integer	yes
categories	string[]		Default: [].
fy_mpa	number	yes
le_mm	number	yes
mx_star	number	yes
my_star	number		Default: 0.
n_star	number	yes
v_star	number	yes

Result: WasmAs4100OptimizeResult

Result fields

Field	Type	Required	Description
best_category	string	yes
best_mass_kg_m	number	yes
best_name	string	yes
considered	integer	yes
feasible	integer	yes
found	boolean	yes
util_max	number	yes

as4100_phi_mbx

AS 4100 member moment capacity phiMbx with lateral-torsional buckling (Cl 5.6).

as4100_phi_mbx(json_input: &str) -> String

Input json_input: WasmAs4100PhiMbxInput

Field	Type	Required	Description
alpha_m_case	integer	yes	0=UniformMoment, 1=SimplySupportedUdl, 2=SimplySupportedPointLoad, 3=EndMoments, 4=CantileverUdl
beta_m	number		Default: 0.
bf	number	yes
d	number	yes
e	number		Default: 200000.
fyf	number	yes
fyw	number	yes
g	number		Default: 80000.
i_w	number		Default: 0.
i_y	number	yes
j	number	yes
le_mm	number	yes
phi	number		Default: 0.9.
s_x	number	yes
tf	number	yes
tw	number	yes
z_x	number	yes

Result: WasmAs4100PhiMbxResult

Result fields

Field	Type	Required	Description
alpha_m	number	yes
alpha_s	number	yes
m_o	number	yes
m_sx	number	yes
phi_m_bx	number	yes

as4100_phi_mbx_derivation

The AS 4100 member moment capacity phiMbx with its clause-by-clause working (Cl 5.6).

as4100_phi_mbx_derivation(json_input: &str) -> String

Input json_input: WasmAs4100PhiMbxInput

Field	Type	Required	Description
alpha_m_case	integer	yes	0=UniformMoment, 1=SimplySupportedUdl, 2=SimplySupportedPointLoad, 3=EndMoments, 4=CantileverUdl
beta_m	number		Default: 0.
bf	number	yes
d	number	yes
e	number		Default: 200000.
fyf	number	yes
fyw	number	yes
g	number		Default: 80000.
i_w	number		Default: 0.
i_y	number	yes
j	number	yes
le_mm	number	yes
phi	number		Default: 0.9.
s_x	number	yes
tf	number	yes
tw	number	yes
z_x	number	yes

Result: Derivation

Result fields

Field	Type	Required	Description
code	string	yes	Governing standard name, e.g. "AS 4100".
edition	string	yes	Edition/year of that standard as IMPLEMENTED by the solver - recorded so a historical calc stays traceable to the rules it was run under, even after the standard is revised.
inputs	Input[]	yes
result	Step	yes	The headline line (capacity or utilisation) - carries the pass/fail.
steps	Step[]	yes
title	string	yes

as4100_phi_ms

AS 4100 section moment capacity phiMs and section classification (Cl 5.2).

as4100_phi_ms(json_input: &str) -> String

Input json_input: WasmAs4100SectionInput

Field	Type	Required	Description
bf	number	yes
d	number	yes
fyf	number	yes
fyw	number	yes
s_x	number	yes
tf	number	yes
tw	number	yes
z_x	number	yes

Result: WasmAs4100PhiMsResult

Result fields

Field	Type	Required	Description
lambda_s	number	yes
lambda_sp	number	yes
lambda_sy	number	yes
m_sx	number	yes
phi_m_sx	number	yes
section_class	string	yes
z_ex	number	yes

as4100_phi_ms_derivation

The AS 4100 section moment capacity phiMs with its clause-by-clause working (Cl 5.2).

as4100_phi_ms_derivation(json_input: &str) -> String

Input json_input: WasmAs4100SectionInput

Field	Type	Required	Description
bf	number	yes
d	number	yes
fyf	number	yes
fyw	number	yes
s_x	number	yes
tf	number	yes
tw	number	yes
z_x	number	yes

Result: Derivation

Result fields

Field	Type	Required	Description
code	string	yes	Governing standard name, e.g. "AS 4100".
edition	string	yes	Edition/year of that standard as IMPLEMENTED by the solver - recorded so a historical calc stays traceable to the rules it was run under, even after the standard is revised.
inputs	Input[]	yes
result	Step	yes	The headline line (capacity or utilisation) - carries the pass/fail.
steps	Step[]	yes
title	string	yes

as4100_phi_nc

AS 4100 member compression capacity phiNc (Cl 6.3).

as4100_phi_nc(json_input: &str) -> String

Input json_input: WasmAs4100PhiNcInput

Field	Type	Required	Description
alpha_b	number		Default: 0.
area	number	yes
fy	number	yes
kf	number		Default: 1.
le_mm	number	yes
phi	number		Default: 0.9.
r	number	yes

Result: WasmAs4100PhiNcResult

Result fields

Field	Type	Required	Description
alpha_c	number	yes
lambda_n	number	yes
n_c	number	yes
n_s	number	yes
phi_n_c	number	yes

as4100_phi_nc_derivation

The AS 4100 member compression capacity phiNc with its clause-by-clause working (Cl 6.3).

as4100_phi_nc_derivation(json_input: &str) -> String

Input json_input: WasmAs4100PhiNcInput

Field	Type	Required	Description
alpha_b	number		Default: 0.
area	number	yes
fy	number	yes
kf	number		Default: 1.
le_mm	number	yes
phi	number		Default: 0.9.
r	number	yes

Result: Derivation

Result fields

Field	Type	Required	Description
code	string	yes	Governing standard name, e.g. "AS 4100".
edition	string	yes	Edition/year of that standard as IMPLEMENTED by the solver - recorded so a historical calc stays traceable to the rules it was run under, even after the standard is revised.
inputs	Input[]	yes
result	Step	yes	The headline line (capacity or utilisation) - carries the pass/fail.
steps	Step[]	yes
title	string	yes

as4100_phi_vv

AS 4100 web shear capacity phiVv (Cl 5.11).

as4100_phi_vv(json_input: &str) -> String

Input json_input: WasmAs4100PhiVvInput

Field	Type	Required	Description
d	number	yes
fy	number	yes
section_name	string	yes
tf	number	yes
tw	number	yes

Result: WasmAs4100PhiVvResult

Result fields

Field	Type	Required	Description
phi_vv	number	yes

as4100_tapered_check

Web-tapered (non-prismatic) member check to AS 4100 (first-pass).

as4100_tapered_check(json_input: &str) -> String

Input json_input: WasmAs4100TaperedInput

Field	Type	Required	Description
alpha_b	number		Default: 0.
alpha_m_case	integer	yes
b_f_mm	number	yes
d_a_mm	number	yes
d_b_mm	number	yes
fy_mpa	number	yes
le_mm	number	yes
length_mm	number	yes
t_f_mm	number	yes
t_w_mm	number	yes

Result: WasmAs4100TaperedResult

Result fields

Field	Type	Required	Description
d_govern_mm	number	yes
phi_mb	number	yes
phi_ms	number	yes
phi_nc	number	yes
taper_ratio	number	yes
x_govern_mm	number	yes

as4100_web_bearing

AS 4100 web bearing capacity under a concentrated load (Cl 5.13).

as4100_web_bearing(json_input: &str) -> String

Input json_input: WasmWebBearingInput

Field	Type	Required	Description
b_s	number	yes	Stiff bearing length (m).
both_flanges_restrained	boolean		Both flanges restrained against lateral movement (default true). Default: true.
d1	number	yes	Clear web depth between flanges (m).
end_dist	number		Distance from member end to the nearer edge of the bearing (m). Negative or missing = interior load. Default: -1.
fy	number	yes	Web yield stress (Pa).
tf	number	yes
tw	number	yes

Result: untyped (JSON built with json!, no Rust type)

Steel - other codes

aisc360_composite_check

AISC 360 composite beam check (Chapter I).

aisc360_composite_check(json_input: &str) -> String

Input json_input: WasmAisc360CompositeInput

Field	Type	Required	Description
a_s	number	yes
b_eff_mm	number	yes
d_mm	number	yes
f_prime_c_mpa	number	yes
fu_stud_mpa	number	yes
fy_mpa	number	yes
n_studs	integer	yes
phi	number		Default: 0.9.
stud_dia_mm	number	yes
t_c_mm	number	yes

Result: WasmAisc360CompositeResult

Result fields

Field	Type	Required	Description
degree_of_shear_connection	number	yes
horizontal_shear_force	number	yes
phi_mn_full	number	yes
phi_mn_partial	number	yes
stud_shear_force	number	yes

aisc360_member_check

AISC 360 member check: compression, flexure, shear and interaction.

aisc360_member_check(json_input: &str) -> String

Input json_input: WasmAisc360MemberInput

Field	Type	Required	Description
a	number	yes
bf	number	yes
cb	number		Default: 0.
d	number	yes
e	number		Default: 0.
fu	number		Default: 0.
fy	number	yes
hollow	boolean		A hollow section (RHS/SHS/CHS). Slender-element compression (E7) is applied to I-shapes only until the hollow-wall case, Table E7.1 (b), is in; absent means an I-shape. Default: false.
iyy	number	yes
izz	number	yes
j	number	yes
lb	number	yes
leMajor	number	yes
leMinor	number	yes
mxStar	number	yes
myStar	number	yes
nStar	number	yes
szz	number		Default: 0.
tf	number	yes
tw	number	yes
vxStar	number	yes
zzz	number		Default: 0.

Result: WasmAisc360MemberResult

Result fields

Field	Type	Required	Description
assumptions	WasmAisc360Assumptions	yes
governing	string	yes
phiMnx	number	yes
phiMny	number	yes
phiPn	number	yes
phiPnComp	number	yes
phiVn	number	yes
section_class	string	yes
utilAxial	number	yes
utilCombined	number	yes
utilFlexX	number	yes
utilFlexY	number	yes
utilMax	number	yes
utilShear	number	yes

as4600_capacity

AS/NZS 4600 cold-formed member capacity by the effective width method (C, Z and SHS sections).

as4600_capacity(json_input: &str) -> String

Input json_input: WasmAs4600Input

Field	Type	Required	Description
b	number	yes
d	number	yes
e	number		Default: 200000.
f_y	number	yes
lip	number		Default: 0.
r	number		Default: 0.
section_type	string	yes
t	number	yes

Result: WasmAs4600Result

Result fields

Field	Type	Required	Description
aEff	number	yes
aGross	number	yes
governing	string	yes
phiMs	number	yes
phiNc	number	yes
zEff	number	yes
zGross	number	yes

as4600_combined

AS/NZS 4600 combined actions check of a cold-formed member.

as4600_combined(json_input: &str) -> String

Input json_input: WasmAs4600CombinedInput

Field	Type	Required	Description
m_star_x	number		Default: 0.
m_star_y	number		Default: 0.
n_comp	number		Default: 0.
n_tens	number		Default: 0.
phi_mbx	number		Default: 0.
phi_mby	number		Default: 0.
phi_ncx	number		Default: 0.
phi_ncy	number		Default: 0.
phi_nt	number		Default: 0.

Result: ColdFormedCombined

Result fields

Field	Type	Required	Description
axial_util	number	yes	Axial utilisation: |Ncomp| / min(φNcx, φNcy), or |Ntens| / φNt in tension
util_max	number	yes	Cl 3.5 linear interaction sum = axial_util + util_mx + util_my
util_mx	number	yes	Major-axis bending utilisation M*x / φMbx
util_my	number	yes	Minor-axis bending utilisation M*y / φMby

as5100_combined

AS 5100.6 combined actions check of a steel bridge member.

as5100_combined(json_input: &str) -> String

Input json_input: WasmAs5100CombinedInput

Field	Type	Required	Description
kf	number		Default: 1.
mStarX	number	yes
mStarY	number		Default: 0.
nStar	number	yes
ns	number	yes
phiMbx	number	yes
phiMby	number		Default: 0.
phiMsx	number	yes
phiMsy	number		Default: 0.
phiNcx	number	yes
phiNcy	number	yes
phiNt	number	yes
sectionClass	string	yes

Result: WasmAs5100CombinedResult

Result fields

Field	Type	Required	Description
axialUtil	number	yes
memberUtilX	number	yes
memberUtilY	number	yes
phiMOx	number	yes
phiMOy	number	yes
phiMRx	number	yes
phiMRy	number	yes
sectionUtilX	number	yes
sectionUtilY	number	yes
utilBiaxialMember	number	yes
utilBiaxialSection	number	yes
utilMax	number	yes

as5100_member_check

AS 5100.6 steel bridge member check: section and member capacities.

as5100_member_check(json_input: &str) -> String

Input json_input: WasmAs5100MemberInput

Field	Type	Required	Description
a	number	yes
alphaMCase	integer	yes	0=UniformMoment, 1=SimplySupportedUdl, 2=SimplySupportedPointLoad, 3=EndMoments, 4=CantileverUdl
beta_m	number		Default: 0.
bf	number	yes
d	number	yes
e	number		Default: 200000.
fu	number		Default: 0.
fy	number	yes
iyy	number	yes
izz	number	yes
j	number	yes
leMajor	number	yes
leMinor	number	yes
mxStar	number	yes
myStar	number		Default: 0.
nStar	number	yes
syy	number		Default: 0.
szz	number		Default: 0.
tf	number	yes
tw	number	yes
vxStar	number		Default: 0.
zyy	number		Default: 0.
zzz	number		Default: 0.

Result: WasmAs5100MemberResult

Result fields

Field	Type	Required	Description
assumptions	WasmAs5100Assumptions	yes
governing	string	yes
phiMbx	number	yes
phiMby	number	yes
phiMsx	number	yes
phiMsy	number	yes
phiNcx	number	yes
phiNcy	number	yes
phiNt	number	yes
phiVv	number	yes
section_class	string	yes
utilAxial	number	yes
utilCombined	number	yes
utilFlexX	number	yes
utilFlexY	number	yes
utilMax	number	yes
utilShear	number	yes

ec3_member_check

EN 1993-1-1 member check: cross-section resistances, buckling and interaction.

ec3_member_check(json_input: &str) -> String

Input json_input: WasmEc3MemberInput

Field	Type	Required	Description
a	number	yes
bf	number	yes
c1	number		Default: 0.
d	number	yes
e	number		Default: 0.
fy	number	yes
iyy	number	yes
izz	number	yes
j	number	yes
lcrLT	number	yes
lcrY	number	yes
lcrZ	number	yes
myStar	number	yes
mzStar	number	yes
nStar	number	yes
name	string		Section name (optional): picks the Cl 6.2.6(3) shear area by shape (I, channel, RHS, CHS). Default: "".
r	number		Root radius (m, optional): the fillets' part of the rolled-section shear area. Default: 0.
szz	number		Default: 0.
tf	number	yes
tw	number	yes
vyStar	number	yes
w_el_y	number		Default: 0.
w_pl_y	number		Default: 0.
zzz	number		Default: 0.

Result: WasmEc3MemberResult

Result fields

Field	Type	Required	Description
MbRd	number	yes
MyRd	number	yes
MzRd	number	yes
NbYRd	number	yes
NbZRd	number	yes
NcRd	number	yes
NtRd	number	yes
VplRd	number	yes
assumptions	WasmEc3Assumptions	yes
governing	string	yes
section_class	string	yes
utilAxial	number	yes
utilCombined	number	yes
utilFlexY	number	yes
utilFlexZ	number	yes
utilMax	number	yes
utilShear	number	yes

nzs3404_combined

NZS 3404 Section 8 (and Cl 5.12.3) for one member and one load case.

nzs3404_combined(json_input: &str) -> String

Input json_input: WasmNzs3404CombinedInput

Field	Type	Required	Description
doubly_symmetric	boolean		Whether the outline is doubly symmetric. With kf and the class, this is the third condition on the higher tier of Cl 8.3.2/8.3.3, and it cannot be inferred from the numbers above. Default: false.
kf	number		Default: 1.
m_star_x	number	yes
m_star_y	number		Default: 0.
n_star	number	yes
phi_mbx	number	yes
phi_msx	number	yes
phi_msy	number		Default: 0.
phi_ncx	number	yes
phi_ncy	number	yes
phi_ns	number	yes
phi_nt	number	yes
phi_vv	number		Default: 0.
section_class	string	yes	"compact" | "non-compact" | "slender", from the capacity record.
v_star	number		Default: 0.

Result: WasmNzs3404CombinedResult

Result fields

Field	Type	Required	Description
governed_by	string	yes	The clause the governing check came from, for the report line.
higher_tier	boolean	yes
phi_m_ix	number	yes
phi_m_ox	number	yes
phi_m_rx	number	yes
phi_m_ry	number	yes
util_axial	number	yes
util_max	number	yes
util_member_biaxial	number	yes
util_member_in_plane	number	yes
util_member_out_of_plane	number	yes
util_section_biaxial	number	yes
util_section_x	number	yes
util_section_y	number	yes
util_shear	number	yes

nzs3404_member_check

NZS 3404:Part 1:1997 - one member, one load case, Sections 5 through 8.

nzs3404_member_check(json_input: &str) -> String

Input json_input: WasmNzs3404MemberInput

Field	Type	Required	Description
ag	number	yes	Gross area, net area (mm²) and the Cl 7.3 correction factor for eccentric end connections.
alpha_m	number		Cl 5.6.1.1 moment modification factor. Pass 1.0 for uniform moment. Default: 1.
an	number		Default: 0.
bf	number		Default: 0.
category	string	yes	"1", "2", "3" or "4" - NZS 3404 Section 12. No default: see the note above.
d	number	yes	Overall depth, flange width, flange thickness, web thickness (mm). For a CHS, d is the outside diameter and tw the wall.
doubly_symmetric	boolean		Whether the outline is doubly symmetric - one of the three conditions on the higher tier of Section 8, and not inferable from the numbers above. Default: false.
e	number		Elastic and shear moduli (MPa). Default to the standard's steel values. Default: 200000.
family	string	yes	Which shear-area and slenderness family the outline belongs to: "hot-rolled-i", "welded-i", "rhs", "chs".
fu	number	yes	Tensile strength (MPa).
fyf	number	yes	Flange yield stress (MPa) - Cl 5.2.1 reads the FLANGE value, not the lower of flange and web.
fyw	number		Web yield stress (MPa). Default: 0.
g	number		Default: 80000.
iw	number	yes
iy	number	yes	Second moment of area about the minor axis (mm⁴), torsion constant (mm⁴), warping constant (mm⁶) - the Cl 5.6.1.1 reference buckling moment needs all three.
j	number	yes
kf	number		Form factor (Cl 6.2). 1.0 for a fully effective section. Default: 1.
kte	number		Default: 1.
le_ltb	number	yes
lex	number	yes	Effective lengths for compression about each axis, and for lateral-torsional buckling (mm).
ley	number	yes
m_star_x	number		Default: 0.
m_star_y	number		Default: 0.
n_star	number		Design actions for this load case. n_star is NEGATIVE in compression. Default: 0.
rx	number	yes	Radii of gyration (mm).
ry	number	yes
sx	number	yes
sy	number	yes
tf	number		Default: 0.
tw	number	yes
v_star	number		Default: 0.
zx	number	yes	Elastic and plastic section moduli about each axis (mm³).
zy	number	yes

Result: untyped (no typed serialisation found)

Connections

aisc360_bolt_capacity

AISC 360 bolt capacity: shear, tension and bearing (Chapter J).

aisc360_bolt_capacity(json_input: &str) -> String

Input json_input: WasmAiscBoltInput

Field	Type	Required	Description
bolt_diameter	number	yes
bolt_grade	string	yes
clear_distance	number		Default: 0.
n_shear_planes	integer	yes
ply_fu	number		Default: 0.
ply_thickness	number		Default: 0.
threads_excluded	boolean		Default: false.

Result: WasmAiscBoltResult

Result fields

Field	Type	Required	Description
phiRnBearing	number	yes
phiRnShear	number	yes
phiRnTearout	number	yes
phiRnTension	number	yes

aisc360_weld_capacity

AISC 360 fillet weld capacity (Section J2).

aisc360_weld_capacity(json_input: &str) -> String

Input json_input: WasmAiscWeldInput

Field	Type	Required	Description
fexx	number	yes
leg_size	number	yes
length	number	yes
theta_deg	number		Default: 0.

Result: WasmAiscWeldResult

Result fields

Field	Type	Required	Description
phiRn	number	yes

base_plate_check

Column base plate check: concrete bearing, plate bending, anchor bolts and anchor shear.

base_plate_check(json_input: &str) -> String

Input json_input: WasmBasePlateInput

Field	Type	Required	Description
bolt_count	integer		Default: 0.
bolt_diameter	number		Default: 0.
bolt_grade	string		Default: "".
column_bf	number	yes
column_d	number	yes
concrete_fc	number	yes
n_star	number	yes
plate_b	number	yes
plate_d	number	yes
plate_fy	number	yes
plate_t	number	yes
v_star	number		Default: 0.

Result: WasmBasePlateResult

Result fields

Field	Type	Required	Description
assumptions	WasmBasePlateAssumptions	yes
bearing_pressure	number	yes
cantilever_b	number	yes
cantilever_d	number	yes
confinement	number	yes
n_star	number	yes
phiAnchorShear	number	yes
phiNcConc	number	yes
phiPlateBending	number	yes
t_req	number	yes
util_anchor_shear	number	yes
util_bearing	number	yes
util_bolts	number	yes
util_interaction	number	yes
util_max	number	yes
util_plate	number	yes

bearing_stiffener_check

Web bearing stiffener check: yield and buckling (AS 4100 Cl 5.14).

bearing_stiffener_check(json_input: &str) -> String

Input json_input: WasmBearingStiffenerInput

Field	Type	Required	Description
b_es	number	yes
d_1	number	yes
f_y	number	yes
f_ys	number	yes
r_star	number	yes
t_f	number	yes
t_s	number	yes
t_w	number	yes

Result: WasmBearingStiffenerResult

Result fields

Field	Type	Required	Description
alphaC	number	yes
lambdaN	number	yes
outstandRatio	number	yes
phiRsb	number	yes
phiRsy	number	yes
r_star	number	yes
util_max	number	yes
util_stiffener_buckling	number	yes
util_stiffener_yield	number	yes

bolt_capacity

AS 4100 bolt capacity: shear, tension and combined (Cl 9.2).

bolt_capacity(json_input: &str) -> String

Input json_input: WasmBoltInput

Field	Type	Required	Description
bolt_diameter	number	yes
bolt_grade	string	yes
kr	number		Default: 1.
ply_fu	number		Default: 0.
ply_thickness	number		Default: 0.
shear_planes_threads_excluded	integer	yes
shear_planes_threads_intercepted	integer	yes

Result: WasmBoltResult

Result fields

Field	Type	Required	Description
minEdge	number	yes
minGauge	number	yes
minPitch	number	yes
phiNtf	number	yes
phiVb	number	yes
phiVf	number	yes

bolt_layout

Lays out a bolt group (rows, columns, pitches, edge distances) for a connection.

bolt_layout(json_input: &str) -> String

Input json_input: WasmBoltLayoutInput

Field	Type	Required	Description
availWidth	number	yes
boltDiameter	number	yes
count	integer	yes
edge	number | null		Default: null.
edgeType	string		Default: "".
end	number | null		Default: null.
gauge	number | null		Default: null.
pitch	number | null		Default: null.

Result: WasmBoltLayout

Result fields

Field	Type	Required	Description
cols	integer	yes
edge	number	yes
end	number	yes
fits	boolean	yes
gauge	number	yes
pitch	number	yes
plateH	number	yes
plateW	number	yes
positions	WasmBoltPos[]	yes
rows	integer	yes
trace	string[]	yes

bridging_check

Purlin bridging bracket check.

bridging_check(json_input: &str) -> String

Input json_input: WasmBridgingInput

Field	Type	Required	Description
bolt_count	integer	yes
bolt_dia	number	yes
bolt_grade	string	yes
bracket_b	number	yes
bracket_fu	number	yes
bracket_fy	number	yes
bracket_t	number	yes
gauge	number	yes	The bolt line's gauge: the spacing of the bolts up the purlin's web.
leg	number		The bracket's leg: how far the bridging member's axis sits off the bolt line. Default: 0.
m_star	number		Default: 0.
n_star	number	yes
v_star	number	yes
web_fu	number	yes
web_t	number	yes

Result: WasmBridgingResult

Result fields

Field	Type	Required	Description
bearingC	number	yes
components	WasmConnComponent[]	yes
govComponent	string	yes
govUtil	number	yes
notes	string[]	yes
status	string	yes

column_side_check

Column-side components of a moment joint: flange bending, web tension, compression and panel shear.

column_side_check(json_input: &str) -> String

Input json_input: WasmColumnSideInput

Field	Type	Required	Description
beamD	number	yes
beamTf	number	yes
bfCol	number		The column flange width, m. Default: 0.
bothFlangesRestrained	boolean		Both column flanges are held at the joint (Cl 5.13.4 slenderness 2.5 d1/tw, else 5.0). Default: false.
dCol	number	yes
flangeInTstub	boolean		The column flange is already checked as bolted T-stubs, so the flange yield line row is left out. Default: false.
flangeWeldLeg	number		The beam flange's fillet weld leg to the column, m (0 for a butt weld or none). Default: 0.
fyCol	number	yes
mStar	number	yes
nStar	number		Default: 0.
plateT	number		The end plate's thickness, m (0 on a welded joint). Default: 0.
stiffenerFy	number		The continuity stiffeners' yield stress, Pa. Default: 0.
stiffenerT	number		The continuity stiffeners' thickness, m (0 when none are drawn). Default: 0.
tfCol	number	yes
twCol	number	yes

Result: WasmColumnSideResult

Result fields

Field	Type	Required	Description
components	WasmConnComponent[]	yes
govComponent	string	yes
govUtil	number	yes
notes	string[]	yes
status	string	yes
stiffenersRequired	boolean	yes

conn_anchor_check

Anchor group concrete checks - the CCD method of EN 1992-4:2018 (AS 5216:2021), with the ACI 318-19 17.8.2.2 anchor-reinforcement credit behind its gates. ADR 0005; the schema is fem_core::conn_anchor::AnchorGroupInput (mm, N, MPa). Every check is three-state; a missing input is a NotDetermined row, never a pass.

conn_anchor_check(json_input: &str) -> String

Input json_input: AnchorGroupInput

Field	Type	Required	Description
anchors	Anchor[]	yes
concrete	Concrete	yes
edges	Edges		Default: {"far_from_all":false,"x_neg":null,"x_pos":null,"y_neg":null,"y_pos":null}.
factors	PartialFactors | null		Default: null.
justification_notes	string[]		Default: [].
loads	Combination[]	yes
per_anchor_forces	AnchorForce[][] | null		Per combination, per anchor, when the joint FEA solved them. Same order as loads. Default: null.
phi_nt_n	number | null		Steel design capacities per anchor, N (AS 4100, phi included). None = steel NotDetermined. Default: null.
phi_vs_n	number | null		Default: null.
post_installed	boolean		Post-installed / chemical anchors are out of scope; a caller that says so gets every concrete check NotDetermined with the reason, never a cast-in number. Default: false.
reinforcement	AnchorReinforcement | null		Default: null.

Result: AnchorCheckResult

Result fields

Field	Type	Required	Description
adequate	boolean | null
bar_dev_length_mm	number | null		AS 3600 development length the claimed bars need, mm (reported; certification is the gate).
bars_accepted	integer[]	yes	Bars the reinforcement gate accepted / rejected, by index into reinforcement.bars.
bars_rejected	[integer, string][]	yes
combinations	CombResult[]	yes
cone_geometry	ConeGeometry | null
factors	PartialFactors	yes
governing	Governing | null		The worst determined utilisation. None while any determined-able check is NotDetermined on the governing side - a verdict with a hole in it is not a verdict (ADR 0003).
notes	string[]	yes

conn_fea_mesh

CBFEM joint FEA, step 1: the mesh only (fem_core::conn_fea, spec in docs/plans/cbfem-3d-spec.md). Takes a ConnFeaInput - plates as placed polygons, bolts as shanks, plus the mesher's sizing field - and returns a ConnFeaMesh: nodes in 3D, triangles, per-plate ranges and the warnings for any hole that could not be cut. There is no solve behind this and it reports no stresses, displacements or utilisations; the designer's Mesh tab is the only thing that should read it until step 2 lands. Errors come back as {"error": "..."}, the same shape as the other exports here, so a caller that forgets to check gets no numbers rather than plausible ones.

conn_fea_mesh(json_input: &str) -> String

Input json_input: ConnFeaInput

Field	Type	Required	Description
anchors	FeAnchor[]		Holding-down anchors: bolts that grip the concrete rather than a second ply. Ignored by conn_fea_mesh - an anchor's HOLE is cut by its bolt like any other. Default: [].
beds	FeBed[]		Elastic beds under bearing plates. Ignored by conn_fea_mesh. Default: [].
bolts	FeBolt[]		Default: [].
loads	FeLoad[]		What is applied. Ignored by conn_fea_mesh. Default: [].
plates	FePlate[]	yes
rotation_probes	FeRotationProbe[]		Cross-sections to report a rotation at, for a joint stiffness. Empty by default and free when empty: the fit runs after the solve, over nodes already computed. Default: [].
sizing	SizingField	yes	The mesher's own sizing field, passed through to mesh_polygon per plate. Hole rims add their own refinement on top of whatever arrives here (see plate_sizing).
supports	FeSupport[]		Where the joint is held. Ignored by conn_fea_mesh; conn_fea_solve refuses without at least one, because an unrestrained shell assembly has six rigid-body modes and a solve that "completes" on one is meaningless. Default: [].
welds	FeWeld[]		Welds tying plate edges to other plates. Ignored by conn_fea_mesh - the mesh is of the plates, and a tie changes nothing about their geometry. Default: [].

Result: ConnFeaMesh

Result fields

Field	Type	Required	Description
bolt_holes	BoltHole[]		One entry per (bolt, plate) pair where a hole was actually CUT. A bolt with fewer than two of these connects nothing. Default: [].
boundary_nodes	integer[]	yes	Node indices on a plate boundary (outer edge or hole rim), global numbering. Step 2 needs these to find weld lines and hole rims without re-deriving the topology.
nodes	number[][]	yes
plate_of_tri	integer[]	yes	For each triangle, the index into ConnFeaMesh::plates it belongs to.
plates	PlateMeshInfo[]	yes
tris	integer[][]	yes
warnings	string[]	yes	Everything that was refused, skipped or clamped, in the words of the reason. Never empty silently: if a hole did not get cut, it says so here.

conn_fea_solve

CBFEM joint FEA, step 2: the LINEAR ELASTIC 3D shell solve on the step-1 mesh (fem_core::conn_fea::conn_fea_solve). Takes the same ConnFeaInput as conn_fea_mesh plus supports and loads - restrained and loaded REGIONS, given as boxes in global coordinates - and returns nodal displacements, elastic von Mises surface stress, and the equilibrium check between what was applied and what the supports gave back. NOT yet wired into any Studio panel, and deliberately. Welds now tie plate edges to the plates they are welded to (spec step 3), but a joint given NO welds still solves as several loose plates - it says so in its warnings - and nothing yet maps a joint's members onto the support and load regions this takes (spec step 4). There is no contact (so no prying), no bolt stiffness, and no plasticity. The folded junction that used to be 6x over-stiff now agrees with OpenSees ShellMITC4 to 5% and with closed-form St Venant torsion, so a welded joint's stiffness is no longer the thing standing in the way - the member mapping is. The component-method checks remain the source of truth for design.

conn_fea_solve(json_input: &str) -> String

Input json_input: ConnFeaInput

Field	Type	Required	Description
anchors	FeAnchor[]		Holding-down anchors: bolts that grip the concrete rather than a second ply. Ignored by conn_fea_mesh - an anchor's HOLE is cut by its bolt like any other. Default: [].
beds	FeBed[]		Elastic beds under bearing plates. Ignored by conn_fea_mesh. Default: [].
bolts	FeBolt[]		Default: [].
loads	FeLoad[]		What is applied. Ignored by conn_fea_mesh. Default: [].
plates	FePlate[]	yes
rotation_probes	FeRotationProbe[]		Cross-sections to report a rotation at, for a joint stiffness. Empty by default and free when empty: the fit runs after the solve, over nodes already computed. Default: [].
sizing	SizingField	yes	The mesher's own sizing field, passed through to mesh_polygon per plate. Hole rims add their own refinement on top of whatever arrives here (see plate_sizing).
supports	FeSupport[]		Where the joint is held. Ignored by conn_fea_mesh; conn_fea_solve refuses without at least one, because an unrestrained shell assembly has six rigid-body modes and a solve that "completes" on one is meaningless. Default: [].
welds	FeWeld[]		Welds tying plate edges to other plates. Ignored by conn_fea_mesh - the mesh is of the plates, and a tie changes nothing about their geometry. Default: [].

Result: ConnFeaResult

Result fields

Field	Type	Required	Description
anchor_forces	AnchorForce2[]		One entry per holding-down anchor. The number a base plate exists to produce. Default: [].
applied_force	number[]	yes	Applied force resultant, N, and the reaction the supports returned - which must equal it.
applied_moment	number[]	yes	The same for MOMENT about the origin, N.m. Reported for the same reason the forces are: a member can carry pure moment, and then the force resultants are both zero and say nothing.
beds	BedResult[]		One entry per elastic bed that had any spring under it: how much the concrete carried, at what peak pressure, and over how much of the plate it was still in contact. Default: [].
bolt_forces	BoltForce[]		One entry per bolt that actually connects two or more plies. Elastic, from a linear connector with no pretension, no contact and no slip - see BoltForce. Default: [].
contact_passes	integer | null		How many active-set passes the bearing/anchor state took to settle. 0 when there was no contact to resolve; None when it did not settle - see the warning that says so. Default: null.
converged	boolean	yes	True only when the solver returned, the solution is finite, and equilibrium closes.
elastic_stress_ratio	number | null		sigma_vm_max / fy over the plates that stated an fy. None when none did. This is an ELASTIC stress ratio, NOT a code utilisation and NOT the 5% plastic strain criterion.
equilibrium_error	number	yes	|applied + reaction| / |applied|. Zero for a correct solve; reported rather than only asserted, because it is the one number that catches load applied where nobody meant it.
mesh	ConnFeaMesh	yes
reaction_force	number[]	yes
reaction_moment	number[]	yes
rotations	ProbeRotation[]		One entry per rotation probe, in the order they were given. Default: [].
sigma_vm	number[]	yes	Elastic von Mises stress at each node, Pa: the worse of the two plate SURFACES (membrane plus and minus the bending part), area-averaged from the elements meeting at that node.
sigma_vm_max	number	yes
sigma_vm_max_joint	number	yes	The same peak, taken over the JOINT ONLY - every node inside a load or support region, grown by INTRO_MARGIN, is left out. A member's N/V/M are delivered as a force field over one end face, and a force field over a face is not how the member is really loaded: the face sees a local disturbance that dies away within about a section depth, which is St Venant's principle and is the whole reason the stub exists. Measured on a 360UB stub carrying 180 kN.m, the cut face itself reaches 441 MPa - 1.47 times fy - while the joint 250 mm away is a separate and much larger concentration. Both are red on a plot clipped at yield, and only one of them is a result. Reporting the global maximum as "the peak" reports whichever of the two happens to be higher. Equal to sigma_vm_max when nothing was excluded.
u	number[][]	yes	Translation at each node, m, global axes.
u_max	number	yes	Largest nodal translation magnitude, m.
warnings	string[]	yes

conn_stiffener_check

Sizes the column stiffeners and doubler plates a beam-to-column moment joint needs (AS 4100 / AISC).

conn_stiffener_check(json_input: &str) -> String

Input json_input: WasmConnStiffenerInput

Field	Type	Required	Description
b_col	number	yes
d_col	number	yes
flange_bending_util	number	yes
flange_force	number	yes
fy_col	number	yes
fy_stiffener	number	yes
panel_shear_util	number	yes
tf_col	number	yes
tw_col	number	yes
web_bearing_util	number	yes

Result: WasmConnStiffenerResult

Result fields

Field	Type	Required	Description
components	WasmConnStiffenerComponent[]	yes
continuity_plate_area_req	number	yes
continuity_plate_thickness_min	number	yes
doubler_area_req	number	yes
doubler_thickness_min	number	yes
flange_force	number	yes
status	string	yes
stiffeners_required	boolean	yes

eccentric_bolt_group_check

Eccentrically loaded bolt group check (elastic method).

eccentric_bolt_group_check(json_input: &str) -> String

Input json_input: WasmBoltGroupInput

Field	Type	Required	Description
boltDiameter	number	yes
boltGrade	string	yes
bolts	WasmBoltPositionInput[]	yes
kr	number	yes
mz	number	yes
nN	integer	yes
nX	integer	yes
vx	number	yes
vy	number	yes

Result: WasmBoltGroupResult

Result fields

Field	Type	Required	Description
governingBolt	integer	yes
phiVbolt	number	yes
phiVtotal	number	yes
util_max	number	yes
vResultantGov	number	yes

end_plate_check

Moment end plate check: bolt rows as T-stubs (plate yield, prying, bolt failure) to AS 4100.

end_plate_check(json_input: &str) -> String

Input json_input: WasmEndPlateInput

Field	Type	Required	Description
beam_bf	number		Default: 0.
beam_d	number	yes
beam_fy	number		Default: 0.
beam_tf	number	yes
beam_tw	number		Default: 0.
bolt_count_tension	integer	yes
bolt_count_total	integer		Total bolts sharing the shear. 0 defaults to twice the tension count. Default: 0.
bolt_diameter	number	yes
bolt_grade	string	yes
both_directions	boolean		The moment's sign is not known in the joint frame: check with the tension at either flange (rows mirrored to beam_d - y) and report the worse. Default: false.
column_bf	number		Default: 0.
column_d	number		The column the plate bolts to (m, Pa; SA-118): with it the rows are also limited by the column flange as T-stubs and the column web in transverse tension. Default: 0.
column_fy	number		Default: 0.
column_r1	number		Default: 0.
column_stiffened	boolean		Continuity stiffeners opposite the tension flange (the web's tension is theirs). Default: false.
column_tf	number		Default: 0.
column_tw	number		Default: 0.
flange_weld_leg	number		Default: 0.
gauge	number		Centre-to-centre gauge of the two bolt columns (m). Default: 0.
m_star	number	yes
plate_ext	number		How far the plate runs past the tension flange's outer face (m); 0 for a flush plate. Default: 0.
plate_fy	number	yes
plate_thickness	number	yes
plate_width	number		Default: 0.
rows	WasmEndPlateDrawnRow[]		The drawn bolt rows (SA-87). When given, the plate is checked as AS 4100 T-stubs (connections::end_plate_tstub_as4100) instead of the strip model: each row's y (m) from the tension flange's outer face, positive towards the compression flange, and its bolt count. Default: [].
v_star	number		Coincident connection shear (N). Optional; 0 skips the Cl 9.2.2.3 combined shear + tension interaction on the tension bolts. Default: 0.
web_weld_leg	number		Default: 0.

Result: WasmEndPlateResult

Result fields

Field	Type	Required	Description
columnInTstub	boolean		The column flange and web in tension were in the T-stub rows (SA-118). Default: false.
d_eff	number	yes
governing	string		Default: "".
m_star	number	yes
method	string		"tstub" (the drawn rows, AS 4100 T-stubs) or "strip" (no rows given: the plate as one strip). Default: "".
notes	string[]		Default: [].
phiBoltsTension	number	yes
phiMDes	number	yes
phiPlateBending	number	yes
row_capacity	number[]		Default: [].
row_modes	string[]		Per tension row: governing T-stub mode and its capacity (N), top row first. Default: [].
tStar	number	yes
utilWebWeld	number		The web welds to the plate under the shear and the rows' tension, Cl 9.6.3.10 (SA-119). Default: 0.
util_bolt_combined	number	yes
util_bolts	number	yes
util_max	number	yes
util_plate	number	yes

end_plate_moment_multirow_check

Moment end plate with several bolt rows checked row by row as T-stubs.

end_plate_moment_multirow_check(json_input: &str) -> String

Input json_input: WasmEndPlateMultiRowInput

Field	Type	Required	Description
bolt_diameter	number	yes
bolt_grade	string	yes
fc_rd	number	yes
plate_fy	number	yes
plate_thickness	number	yes
plate_width	number	yes
rows	WasmEndPlateRowInput[]	yes

Result: WasmEndPlateMultiRowResult

Result fields

Field	Type	Required	Description
fc_rd	number	yes
m_rd	number	yes
notes	string[]	yes
rows	WasmEndPlateRowResult[]	yes
total_tension	number	yes

fin_plate_check

Fin plate (single plate) shear connection check to AS 4100 Cl 9.

fin_plate_check(json_input: &str) -> String

Input json_input: WasmFinPlateInput

Field	Type	Required	Description
bolt_columns	integer		Default: 0.
bolt_count	integer	yes
bolt_diameter	number	yes
bolt_grade	string	yes
edge_distance	number		Default: 0.
end_distance	number		Default: 0.
gauge	number		Default: 0.
pitch	number		Default: 0.
plate_depth	number	yes
plate_fu	number	yes
plate_fy	number	yes
plate_thickness	number	yes
v_star	number	yes
weld_fuw	number		Default: 480000000.
weld_leg_size	number	yes
weld_length	number	yes

Result: WasmFinPlateResult

Result fields

Field	Type	Required	Description
phiBlockShear	number	yes
phiBolts	number	yes
phiPlateBearing	number	yes
phiPlateShear	number	yes
phiPlateTearout	number	yes
phiVDes	number	yes
phiWeld	number	yes
util_block_shear	number	yes
util_bolts	number	yes
util_max	number	yes
util_plate_bearing	number	yes
util_plate_shear	number	yes
util_plate_tearout	number	yes
util_weld	number	yes
v_star	number	yes

gusset_check

Gusset plate check: Whitmore section, block shear, bolts and welds.

gusset_check(json_input: &str) -> String

Input json_input: WasmGussetInput

Field	Type	Required	Description
alphaB	number		Default: 0.5.
boltDiameter	number	yes
count	integer	yes
edgeType	string		Default: "".
grade	string		Default: "8.8".
k	number		Default: 0.65.
lb	number		Default: 0.12.
memberWidth	number	yes
nShearPlanes	integer		Default: 1.
nStar	number	yes
plateFu	number	yes
plateFy	number	yes
plateThickness	number	yes

Result: WasmGussetResult

Result fields

Field	Type	Required	Description
components	WasmConnComponent[]	yes
govComponent	string	yes
govUtil	number	yes
layout	WasmBoltLayout	yes
notes	string[]	yes
status	string	yes

gusset_support_check

Gusset plate support connection check: face bolts, bearing, plate bending, welds.

gusset_support_check(json_input: &str) -> String

Input json_input: WasmGussetSupportInput

Field	Type	Required	Description
bolt_dia	number	yes
bolt_grade	string	yes
bolted_plate	boolean	yes
cols	integer	yes
f_par	number	yes
f_perp	number	yes
gusset_bolts	integer	yes
lever	number	yes
m_star	number	yes
pitch	number	yes
plate_fy	number	yes
plate_t	number	yes
ply_fu	number	yes
ply_t	number	yes
rows	integer	yes
strip	number	yes
weld_leg	number	yes
weld_len	number	yes

Result: WasmGussetSupportResult

Result fields

Field	Type	Required	Description
f_par	number	yes
f_perp	number	yes
tOuter	number	yes
util_face_bolts	number	yes
util_gusset_bolts	number	yes
util_gusset_weld	number	yes
util_max	number	yes
util_plate_bending	number	yes
util_ply_bearing	number	yes

hollow_brace_end_check

Hollow section brace end check: tongue plate, tube, weld and bolts.

hollow_brace_end_check(json_input: &str) -> String

Input json_input: WasmHollowBraceEndInput

Field	Type	Required	Description
bolt_columns	integer		Default: 1.
bolt_count	integer	yes
bolt_dia	number	yes
bolt_grade	string	yes
n_star	number	yes
slotted	boolean		true: a tongue in a slotted tube; false: a lug on an end plate, the tube whole (plan A2b). Default: true.
tongue_end	number	yes
tongue_fu	number	yes
tongue_fy	number	yes
tongue_t	number	yes
tongue_w	number	yes
tube_d	number	yes
tube_fu	number	yes
tube_fy	number	yes
tube_t	number	yes
weld_leg	number	yes
weld_len	number	yes

Result: WasmHollowBraceEndResult

Result fields

Field	Type	Required	Description
n_star	number	yes
phiBoltShear	number	yes
phiTongueBearing	number	yes
phiTongueFracture	number	yes
phiTongueTearout	number	yes
phiTongueYield	number	yes
phiTubeNet	number	yes
phiWeld	number	yes
shearLagU	number	yes
util_bolt_shear	number	yes
util_max	number	yes
util_tongue	number	yes
util_tongue_bearing	number	yes
util_tube	number	yes
util_weld	number	yes

lap_check

Lapped cold-formed purlin or girt connection check.

lap_check(json_input: &str) -> String

Input json_input: WasmLapInput

Field	Type	Required	Description
bolt_count	integer	yes
bolt_dia	number	yes
bolt_grade	string	yes
eccentricity	number		The ply standoff: how far the bolt line sits off the member's own axis. Default: 0.
m_star	number		Default: 0.
n_star	number	yes
pitch	number	yes
ply1_fu	number	yes
ply1_t	number	yes
ply2_fu	number	yes
ply2_t	number	yes
v_star	number	yes

Result: WasmLapResult

Result fields

Field	Type	Required	Description
bearingC	number	yes
components	WasmConnComponent[]	yes
govComponent	string	yes
govUtil	number	yes
kr	number	yes
lapLength	number	yes
notes	string[]	yes
status	string	yes

lap_reduction_kr

AS 4100 Table 9.2.2.1 - the bolted lap reduction factor, exported so the JS side can SIZE with the same number the check will grade with. The generator proposes a brace bolt count from the axial demand, and that proposal has to account for the reduction or it under-counts every lap over 300 mm - the check then reports an OVER on a joint the product itself proposed. Exported rather than re-written in JS because a table with two homes is a table that will disagree with itself: fem-core::connections::lap_reduction_kr is the one implementation, unit-tested against the table's own boundaries. lj_mm is the length of the connection between the extreme bolts, measured along the force.

lap_reduction_kr(lj_mm: f64) -> f64

Result: untyped (returns f64, not JSON)

moment_base_check

Fixed (moment) column base check: bearing, plate bending and anchor tension.

moment_base_check(json_input: &str) -> String

Input json_input: WasmMomentBaseInput

Field	Type	Required	Description
boltDiameter	number	yes
columnBf	number		Default: 0.
columnD	number	yes
concreteFc	number	yes
grade	string		Default: "8.8".
mStar	number	yes
nStar	number		Default: 0.
nTension	integer	yes
plateB	number	yes
plateD	number	yes
plateFy	number	yes
plateT	number	yes
vStar	number		Default: 0.

Result: WasmMomentBaseResult

Result fields

Field	Type	Required	Description
anchorTension	number	yes
bearingLength	number	yes
components	WasmConnComponent[]	yes
govComponent	string	yes
govUtil	number	yes
notes	string[]	yes
status	string	yes

purlin_cleat_check

Purlin cleat check: bolts, bearing on purlin and cleat, cleat bending and weld.

purlin_cleat_check(json_input: &str) -> String

Input json_input: WasmPurlinCleatInput

Field	Type	Required	Description
bolt_count	integer	yes
bolt_dia	number	yes
bolt_grade	string	yes
bolt_height	number	yes
cleat_b	number	yes
cleat_edge	number	yes
cleat_fu	number	yes
cleat_fy	number	yes
cleat_t	number	yes
purlin_fu	number	yes
purlin_t	number	yes
v_lat	number		Default: 0.
v_star	number	yes
weld_leg	number	yes

Result: WasmPurlinCleatResult

Result fields

Field	Type	Required	Description
bearingC	number	yes
phiBoltShear	number	yes
phiCleatBearing	number	yes
phiCleatBending	number	yes
phiCleatTearout	number	yes
phiPurlinBearing	number	yes
phiWeldShear	number	yes
util_bolt_shear	number	yes
util_cleat_bearing	number	yes
util_cleat_bending	number	yes
util_max	number	yes
util_purlin_bearing	number	yes
util_weld	number	yes
v_lat	number	yes
v_star	number	yes

ridge_tie_cleat_check

Ridge tie cleat: the tie's axial force and shear on a plate hung under the rafter soffit (SI in: m, Pa, N; utilisations out). See fem_core::conn_ridge_tie for the limit states.

ridge_tie_cleat_check(json_input: &str) -> String

Input json_input: WasmRidgeTieInput

Field	Type	Required	Description
bolt_diameter	number	yes
bolt_grade	string		Default: "8.8".
e	number	yes	Weld line to the bolt group's centroid (m).
n_bolts	integer	yes
n_star	number		Default: 0.
plate_b	number	yes
plate_fu	number	yes
plate_fy	number	yes
plate_t	number	yes
tie_end	number		Default: 0.
tie_fu	number		Default: 440000000.
tie_tw	number	yes
v_star	number		Default: 0.
weld_fuw	number		Default: 480000000.
weld_leg	number	yes

Result: RidgeTieCapacity

Result fields

Field	Type	Required	Description
governing	string	yes
util_bolt_shear	number	yes
util_max	number	yes
util_plate_axial	number	yes
util_plate_bearing	number	yes
util_plate_bending	number	yes
util_plate_shear	number	yes
util_tie_bearing	number	yes
util_weld	number	yes

rod_brace_check

Rod brace end check: rod, pin, lug, bolts and welds.

rod_brace_check(json_input: &str) -> String

Input json_input: WasmRodBraceInput

Field	Type	Required	Description
bolt_count	integer	yes
bolt_dia	number	yes
bolt_grade	string	yes
lug_edge	number	yes
lug_fu	number	yes
lug_t	number	yes
n_star	number	yes
n_star_bolts	number		Default: 0.
pin_dia	number	yes
pin_fy	number	yes
pin_shear_planes	integer		Default: 2.
rod_dia	number	yes
rod_fu	number	yes
rod_fy	number	yes
threaded	boolean		Default: true.
v_star_bolts	number		Default: 0.

Result: WasmRodBraceResult

Result fields

Field	Type	Required	Description
n_star	number	yes
phiBoltShear	number	yes
phiBoltTension	number	yes
phiLugBearing	number	yes
phiLugTearout	number	yes
phiPinBearing	number	yes
phiPinShear	number	yes
phiRod	number	yes
rodAn_mm2	number	yes
util_bolts	number	yes
util_lug	number	yes
util_max	number	yes
util_pin_bearing	number	yes
util_pin_shear	number	yes
util_rod	number	yes

seat_check

Seated beam connection check (stiffened seat).

seat_check(json_input: &str) -> String

Input json_input: WasmSeatInput

Field	Type	Required	Description
beam_d	number	yes
beam_fy	number	yes
beam_tf	number	yes
beam_tw	number	yes
seat_fy	number	yes
seat_len	number	yes
seat_t	number	yes
seat_w	number	yes
stiff_fy	number	yes
stiff_h	number	yes
stiff_t	number	yes
v_star	number	yes
weld_fuw	number		Default: 480000000.
weld_leg	number	yes
weld_len	number	yes

Result: WasmSeatResult

Result fields

Field	Type	Required	Description
bearingWidth	number	yes
components	WasmConnComponent[]	yes
govComponent	string	yes
govUtil	number	yes
notes	string[]	yes
phiBearingBuckling	number	yes
phiBearingYield	number	yes
status	string	yes

shear_key_check

Base plate shear key check: bearing on concrete, key bending and weld.

shear_key_check(json_input: &str) -> String

Input json_input: WasmShearKeyInput

Field	Type	Required	Description
boltDiameter	number		Default: 0.
concreteFc	number	yes
fuw	number		Default: 480000000.
grade	string		Default: "8.8".
keyB	number	yes
keyFy	number	yes
keyH	number	yes
keyT	number	yes
nAnchor	integer		Default: 0.
nStar	number		Default: 0.
plateB	number	yes
plateD	number	yes
plateFy	number		Default: 0.
plateT	number		Default: 0.
vStar	number		Default: 0.
weldLeg	number		Default: 0.

Result: WasmShearKeyResult

Result fields

Field	Type	Required	Description
components	WasmConnComponent[]	yes
govComponent	string	yes
govUtil	number	yes
notes	string[]	yes
status	string	yes

shear_plate_check

Flexible end plate or web side plate shear connection (ASI Design Guides 4 and 3), each component to AS 4100.

shear_plate_check(json_input: &str) -> String

Input json_input: WasmShearPlateInput

Field	Type	Required	Description
a	number		Default: 0.
a_eh_beam	number		Default: 0.
a_ev	number	yes	Plate edge distance to the end bolts (vertical).
beam	WasmShearBeam | null		The beam as an object, or flat as beam_d / beam_bf / beam_tf / beam_tw / beam_fy / beam_fu - the flat form is what a family package's input map can name.
beam_bf	number		Default: 0.
beam_cope	string		The flat form's cope (SA-113): "none" (default), "swc" / "top", "dwc" / "double", with its top depth, bottom depth and length (m). The nested beam object carries the same fields. Default: "".
beam_d	number		Default: 0.
beam_d_cb	number		Default: 0.
beam_d_ct	number		Default: 0.
beam_fu	number		Default: 440000000.
beam_fy	number		Default: 300000000.
beam_l_c	number		Default: 0.
beam_tf	number		Default: 0.
beam_tw	number		Default: 0.
bolt_count	integer		Default: 0.
bolt_diameter	number	yes
bolt_grade	string		Default: "8.8".
cols	integer		Default: 1.
gauge	number		Default: 0.
kind	string		"fep" (flexible end plate) or "wsp" (web side plate / fin plate, the default). Default: "wsp".
pitch	number	yes
plate_b	number	yes
plate_fu	number	yes
plate_fy	number	yes
plate_t	number	yes
rows	integer		Rows, or leave 0 and give the total bolt_count: rows = ceil(count / cols). Default: 0.
s_g1	number		WSP: weld line to the first bolt column, the beam's end distance, beam top to the top bolt. Default: 0.
threads_included	boolean		Default: true.
v_star	number		Default: 0.
weld_fuw	number		Default: 480000000.
weld_leg	number	yes

Result: WasmShearPlateResult

Result fields

Field	Type	Required	Description
components	WasmConnComponent[]	yes
dI	number	yes
e	number	yes
govComponent	string	yes
govUtil	number	yes
governing	string	yes
kind	string	yes
notes	string[]	yes
phiVDes	number	yes	Least component capacity (N) and its key (Va..Vh), whatever the demand.
status	string	yes

splice_check

Bolted member splice check: cover plates, bolts, net section and block shear.

splice_check(json_input: &str) -> String

Input json_input: WasmSpliceInput

Field	Type	Required	Description
boltDiameter	number	yes
endDist	number		Default: 0.
flangeT	number	yes
fpB	number	yes
fpFu	number	yes
fpFy	number	yes
fpT	number	yes
grade	string		Default: "8.8".
mStar	number	yes
nFlange	integer	yes
nStar	number		Default: 0.
nWeb	integer		Default: 0.
pitch	number	yes
sectionD	number	yes
vStar	number		Default: 0.
wpT	number		Default: 0.

Result: WasmSpliceResult

Result fields

Field	Type	Required	Description
components	WasmConnComponent[]	yes
govComponent	string	yes
govUtil	number	yes
notes	string[]	yes
status	string	yes

through_plate_check

Through-plate connection to a hollow section check.

through_plate_check(json_input: &str) -> String

Input json_input: WasmThroughPlateInput

Field	Type	Required	Description
f_star	number	yes
n_slots	integer	yes
n_star	number	yes
plate_t	number	yes
tube_d	number	yes
tube_fu	number	yes
tube_fy	number	yes
tube_t	number	yes
weld_leg	number	yes
weld_len	number	yes

Result: WasmThroughPlateResult

Result fields

Field	Type	Required	Description
f_star	number	yes
n_star	number	yes
phiTubeNet	number	yes
phiWeld	number	yes
util_max	number	yes
util_through_weld	number	yes
util_tube_through	number	yes

web_cleat_check

Double-angle web cleat shear connection check.

web_cleat_check(json_input: &str) -> String

Input json_input: WasmWebCleatInput

Field	Type	Required	Description
boltDiameter	number	yes
dCleat	number	yes
eSup	number		Default: 0.
eWeb	number	yes
edgeDist	number		Default: 0.
endDist	number		Default: 0.
fuCleat	number	yes
fuWeb	number	yes
fyCleat	number	yes
grade	string		Default: "8.8".
nSup	integer	yes
nWeb	integer	yes
pitch	number	yes
tCleat	number	yes
tWeb	number	yes
vStar	number	yes

Result: WasmWebCleatResult

Result fields

Field	Type	Required	Description
components	WasmConnComponent[]	yes
govComponent	string	yes
govUtil	number	yes
notes	string[]	yes
status	string	yes

weld_capacity

AS 4100 fillet weld capacity per unit length (Cl 9.6).

weld_capacity(json_input: &str) -> String

Input json_input: WasmWeldInput

Field	Type	Required	Description
fuw	number		Default: 480000000.
kr	number		Default: 1.
leg_size	number	yes
length	number	yes

Result: WasmWeldResult

Result fields

Field	Type	Required	Description
phiVw	number	yes

weld_group_check

Eccentrically loaded fillet weld group check (elastic method).

weld_group_check(json_input: &str) -> String

Input json_input: WasmWeldGroupInput

Field	Type	Required	Description
fuw	number	yes
kr	number	yes
mz	number	yes
segments	WasmWeldSegmentInput[]	yes
vx	number	yes
vy	number	yes

Result: WasmWeldGroupResult

Result fields

Field	Type	Required	Description
governingSegment	integer	yes
phiVperMmGov	number	yes
phiVtotal	number	yes
util_max	number	yes
vPerMmGov	number	yes

welded_moment_check

Welded beam-to-column moment connection check.

welded_moment_check(json_input: &str) -> String

Input json_input: WasmWeldedMomentInput

Field	Type	Required	Description
flangeB	number	yes
flangeCpbw	boolean		Default: true.
flangeLeg	number		Default: 0.
flangeT	number	yes
fuw	number		Default: 480000000.
fy	number	yes
mStar	number	yes
nStar	number		Default: 0.
sectionD	number	yes
vStar	number		Default: 0.
webLeg	number		Default: 0.
webT	number		Default: 0.

Result: WasmWeldedMomentResult

Result fields

Field	Type	Required	Description
components	WasmConnComponent[]	yes
govComponent	string	yes
govUtil	number	yes
notes	string[]	yes
status	string	yes

Concrete - AS 3600

as3600_rc_beam_moment

AS 3600 rectangular RC beam moment capacity phiMu by the rectangular stress block (Cl 8.1).

as3600_rc_beam_moment(json_input: &str) -> String

Input json_input: WasmRcBeamInput

Field	Type	Required	Description
a_sc	number		Default: 0.
a_st	number	yes
b	number	yes
d	number	yes
d_sc	number		Default: 0.
f_prime_c	number	yes
f_sy	number	yes

Result: WasmRcBeamResult

Result fields

Field	Type	Required	Description
a	number	yes
kU	number	yes
overReinforced	boolean	yes
phi	number	yes
phiMu	number	yes

as3600_rc_beam_serviceability

AS 3600:2018 Cl 8.5.3 simplified deflection (I_ef, short + long term, k_cs) and the Cl 8.5.4 deemed-to-conform span-to-depth ratio for a rectangular reinforced beam. SI in and out: the result's lengths are metres, moments N.m, second moments m^4, E_c and f'ct.f in Pa.

as3600_rc_beam_serviceability(json_input: &str) -> String

Input json_input: WasmRcBeamServiceInput

Field	Type	Required	Description
a_sc	number		Default: 0.
a_st	number	yes
b	number	yes	SI in: m, m^2, Pa, N/m, N.m. b, D (d_section), d, d_sc; A_st, A_sc; f'c, E_s (default 200 GPa)
d	number	yes
d_sc	number		Default: 0.
d_section	number	yes
defl_limit	number | null		Default: null.
e_s	number | null		Default: null.
eps_cs	number | null		Default: null.
f_prime_c	number	yes
g	number	yes
m_s	number | null		M_s* in N.m, required for continuous spans Default: null.
psi_l	number	yes
psi_s	number	yes
q	number	yes
span	number	yes
support	BeamSupport	yes	"simply_supported" | "cantilever" | "continuous_end" | "continuous_interior"

Result: untyped (JSON built with json!, no Rust type)

as3600_rc_beam_shear

AS 3600 concrete shear strength phiVuc of an RC beam without fitments (Cl 8.2.4).

as3600_rc_beam_shear(json_input: &str) -> String

Input json_input: WasmRcShearInput

Field	Type	Required	Description
a_st	number	yes
b	number	yes
d	number	yes
d_overall	number		Overall depth D (m), optional: d_v = max(0.72 D, 0.9 d) (AS 3600 Cl 8.2.1.9). 0 -> 0.9 d. Default: 0.
f_prime_c	number	yes

Result: WasmRcShearResult

Result fields

Field	Type	Required	Description
phi	number	yes
phiVuc	number	yes
rhoW	number	yes
vUc	number	yes

as3600_rc_column_capacity

AS 3600 RC column capacity under axial load and uniaxial bending (Cl 10.6).

as3600_rc_column_capacity(json_input: &str) -> String

Input json_input: WasmRcColumnInput

Field	Type	Required	Description
a_sc	number	yes
a_st	number	yes
b	number	yes
d	number	yes
d_sc	number		Default: 0.
d_section	number	yes
f_prime_c	number	yes
f_sy	number	yes
m_star	number	yes
n_star	number	yes

Result: WasmRcColumnResult

Result fields

Field	Type	Required	Description
curve	WasmRcColumnCurveResult	yes
phiMN	number	yes
phiMu	number	yes
phiNuo	number	yes
util_interaction	number	yes
util_m	number	yes
util_max	number	yes
util_n	number	yes

as3600_rc_column_interaction_curve

AS 3600 RC column axial-moment interaction diagram (Cl 10.6), point by point.

as3600_rc_column_interaction_curve(json_input: &str) -> String

Input json_input: WasmRcColumnInput

Field	Type	Required	Description
a_sc	number	yes
a_st	number	yes
b	number	yes
d	number	yes
d_sc	number		Default: 0.
d_section	number	yes
f_prime_c	number	yes
f_sy	number	yes
m_star	number	yes
n_star	number	yes

Result: WasmRcColumnCurveResult

Result fields

Field	Type	Required	Description
mBalanced	number	yes
nBalanced	number	yes
phiMu	number	yes
phiNuo	number	yes
points	WasmRcColumnCurvePoint[]	yes

as3600_rc_design_batch

AS 3600 reinforcement required for many rectangular RC members at once (fem-core as3600_design): an array of WasmRcDesignItem in, an array of WasmRcDesignOut out.

as3600_rc_design_batch(json_input: &str) -> String

Input json_input: WasmRcDesignItem[]

Result: WasmRcDesignOut[]

as3600_rc_member_check

AS 3600 RC member check: bending, axial, interaction and shear.

as3600_rc_member_check(json_input: &str) -> String

Input json_input: WasmRcMemberInput

Field	Type	Required	Description
a_sc	number		Default: 0.
a_st	number	yes
b	number	yes
d	number	yes
d_sc	number		Default: 0.
d_section	number	yes
f_prime_c	number	yes
f_sy	number	yes
m_star	number	yes
n_star	number	yes
v_star	number	yes

Result: WasmRcMemberResult

Result fields

Field	Type	Required	Description
governing	string	yes
phiMN	number	yes
phiMu	number	yes
phiNuo	number	yes
phiVuc	number	yes
util_axial	number	yes
util_bending	number	yes
util_interaction	number	yes
util_max	number	yes
util_shear	number	yes

as3600_slab_check

AS 3600 slab check: strip moment, minimum steel, punching and deflection.

as3600_slab_check(json_input: &str) -> String

Input json_input: WasmSlabInput

Field	Type	Required	Description
a_st_per_m	number	yes
col_a	number	yes
col_b	number	yes
cover	number	yes
d	number	yes
f_prime_c	number	yes
f_sy	number	yes
m_star	number	yes
mv_star	number		Moment transferred to the support, M*v (N·m); see WasmSlabPunchingInput::mv_star. Default: 0.
n_star	number	yes
span	number	yes
support_type	integer		Default: 0.
thickness	number		Default: 0.

Result: WasmSlabResult

Result fields

Field	Type	Required	Description
a_st_min	number	yes
a_st_provided	number	yes
betaH	number	yes
fCv	number	yes
governing	string	yes
lOverDActual	number	yes
lOverDLimit	number	yes
phiMu	number	yes
phiVUo	number	yes
util_deflection	number	yes
util_max	number	yes
util_min_steel	number	yes
util_moment	number	yes
util_punching	number	yes
vStarEquivalent	number	yes

as3600_slab_deflection

AS 3600 slab deflection screen by the deemed-to-comply span-to-depth ratio (Cl 9.3.4).

as3600_slab_deflection(json_input: &str) -> String

Input json_input: WasmSlabDeflectionInput

Field	Type	Required	Description
d	number	yes
f_sy	number	yes
span	number	yes
support_type	integer		Default: 0.
thickness	number		Default: 0.

Result: WasmSlabDeflectionResult

Result fields

Field	Type	Required	Description
lOverDActual	number	yes
lOverDLimit	number	yes
util_deflection	number	yes

as3600_slab_punching_shear

AS 3600 slab punching shear capacity (Cl 9.3).

as3600_slab_punching_shear(json_input: &str) -> String

Input json_input: WasmSlabPunchingInput

Field	Type	Required	Description
col_a	number	yes
col_b	number	yes
cover	number	yes
d	number	yes
f_prime_c	number	yes
mv_star	number		Moment transferred to the support, M*v (N·m). Defaults to 0 so an existing payload keeps its old meaning, but Cl 9.3.2(b)(ii) requires it whenever moment IS transferred. Default: 0.
n_star	number	yes

Result: WasmSlabPunchingResult

Result fields

Field	Type	Required	Description
betaH	number	yes	Cl 9.3.1.4 shape factor, and the Cl 9.3.4 moment-transfer outputs. Reported so the result can be hand-checked against the clause instead of taken on trust.
d	number	yes
f_cv	number	yes
phiVUo	number	yes
u	number	yes
util_punching	number	yes
vStarEquivalent	number	yes
vU	number	yes
vUo	number	yes

as3600_slab_strip_moment

AS 3600 slab strip moment capacity and minimum steel.

as3600_slab_strip_moment(json_input: &str) -> String

Input json_input: WasmSlabStripInput

Field	Type	Required	Description
a_st_per_m	number	yes
cover	number	yes
d	number	yes
f_prime_c	number	yes
f_sy	number	yes
m_star	number	yes
thickness	number		Default: 0.

Result: WasmSlabStripResult

Result fields

Field	Type	Required	Description
a_st_min	number	yes
a_st_provided	number	yes
phiMu	number	yes
util_min_steel	number	yes
util_moment	number	yes

composite_beam_check

AS 2327 composite steel-concrete beam check: moment capacity and shear connectors.

composite_beam_check(json_input: &str) -> String

Input json_input: WasmCompositeBeamInput

Field	Type	Required	Description
b_f	number	yes
beam_spacing	number	yes
d	number	yes
d_s	number	yes
d_stud	number	yes
f_prime_c	number	yes
f_u_stud	number	yes
f_y	number	yes
m_star	number	yes
n_studs	integer	yes
span	number	yes
t_f	number	yes
t_w	number	yes
z_e	number	yes

Result: WasmCompositeBeamResult

Result fields

Field	Type	Required	Description
bEff	number	yes
eta	number	yes
fCc	number	yes
fSt	number	yes
mBare	number	yes
mFull	number	yes
nStudsReq	number	yes
phiMbv	number	yes
phiNQ	number	yes
pnaInSlab	boolean	yes
util_max	number	yes
util_moment	number	yes
util_stud	number	yes

rc_beam_section_capacity

Fibre-section analysis of a rectangular RC beam with a bottom and an optional top bar row: gross and cracked properties and the moment-curvature response.

rc_beam_section_capacity(json_input: &str) -> String

Input json_input: WasmRcBeamCapacityInput

Field	Type	Required	Description
b	number	yes	Section width (m).
bottom_bars	WasmRcBarRow	yes	Bottom reinforcement row.
cover	number	yes	Concrete cover to bar centroid (m).
e_c	number		Concrete elastic modulus (Pa). Defaults to 30 GPa. Default: 30000000000.
e_s	number		Steel elastic modulus (Pa). Defaults to 200 GPa. Default: 200000000000.
f_prime_c	number	yes	Concrete compressive strength f'c (Pa).
f_sy	number	yes	Steel yield stress fsy (Pa).
h	number	yes	Section height (m).
kappa_max	number		Maximum curvature for the M-κ curve (1/m). Default: 0.005.
mesh_size	number		Fiber mesh size (m). Smaller = more accurate but slower. Default: 0.002.
n_kappa_points	integer		Number of points on the M-κ curve. Default: 20.
top_bars	WasmRcBarRow | null		Top reinforcement row (optional). Default: null.

Result: WasmRcBeamCapacityOutput

Result fields

Field	Type	Required	Description
area_concrete	number	yes	Plain concrete area, b × h (m²).
area_transformed	number	yes	Transformed gross area, concrete + n·A_s (m²).
d_na_cracked	number	yes	Cracked neutral-axis depth from extreme compression fibre (m).
i_cracked	number	yes	Cracked second moment of area about cracked neutral axis (m⁴).
i_gross	number	yes	Gross second moment of area about centroidal x-axis (m⁴).
k_uo	number	yes	Neutral-axis parameter k_uo = c / d_o at ultimate.
m_cr	number	yes	Cracking moment (N·m).
m_u	number	yes	Nominal ultimate moment capacity from AS 3600 stress block (N·m).
moment_curvature	WasmRcMomentCurvaturePoint[]	yes	Moment-curvature curve.
phi	number	yes	Capacity reduction factor, AS 3600 Table 2.2.2 (ductility-dependent, 0.65 to 0.85).
phi_m_u	number	yes	Capacity-reduced ultimate moment phi * M_u (N·m).
y_centroid	number	yes	Gross section centroid height from bottom (m).

rc_column_interaction_surface_3d

Build the P-Mx-My biaxial interaction surface for a rectangular RC column. The returned (P, Mx, My) points are the NOMINAL (unfactored) section capacity. AS 3600 capacity-reduction (phi, ~0.6 compression-controlled to 0.85 tension-controlled) is NOT applied here. Any design check that compares factored actions (N*, Mx*, My*) against this surface must apply phi first; treating the raw surface as a design envelope over-states capacity.

rc_column_interaction_surface_3d(json_input: &str) -> String

Input json_input: WasmRcBiaxialInput

Field	Type	Required	Description
b	number	yes
f_prime_c	number	yes	Concrete compressive strength f'c (Pa).
f_sy	number	yes	Steel yield stress fsy (Pa).
h	number	yes
mesh_size	number		Fiber mesh size (m). Defaults to 0.005. Default: 0.002.
n_c	integer		Number of neutral-axis depths per angle (>= 3). Default: 21.
n_theta	integer		Number of neutral-axis angles to sweep (>= 2). Default: 8.
rebars	WasmRcRebar[]		Reinforcing bars as a list of {x, y, area} (SI units). Default: [].

Result: WasmRcBiaxialOutput

Result fields

Field	Type	Required	Description
n_c	integer	yes
n_theta	integer	yes
points	WasmRcBiaxialPoint[]	yes

rc_shear_torsion_combined

AS 3600 Cl 8.3 combined shear and torsion check of a rectangular RC beam.

rc_shear_torsion_combined(json_input: &str) -> String

Input json_input: WasmShearTorsionInput

Field	Type	Required	Description
aSt	number	yes
b	number	yes
d	number	yes
fPrimeC	number	yes
h	number	yes
tStar	number	yes
vStar	number	yes

Result: WasmShearTorsionResult

Result fields

Field	Type	Required	Description
governing	string	yes
phiTUc	number	yes
phiVUc	number	yes
utilCombined	number	yes
utilMax	number	yes
utilT	number	yes
utilV	number	yes

Foundations

as2870_design

AS 2870 site classification + deemed-to-comply stiffened-raft footing. Classifies from the soil profile unless site_class is supplied; then selects the footing for construction + slab_length_m.

as2870_design(json_input: &str) -> String

Input json_input: WasmAs2870Input

Field	Type	Required	Description
construction	string		Default: "".
du_surface	number		Default: 1.2.
footing_system	string		Default: "".
hs_m	number		Default: 1.5.
layers	SoilLayer[]		Default: [].
site_class	string		Optional: skip the soil profile and use this class directly ("M", "H1-D", ...). Default: "".
slab_length_m	number		Default: 15.

Result: any

combined_footing_design

Combined (two-column) pad footing: bearing, AS 3600 flexure, one-way and punching shear.

combined_footing_design(json_input: &str) -> String

Input json_input: WasmCombinedFootingInput

Field	Type	Required	Description
barDiameter	number		Default: 0.
bearingBasis	string		Default: "allowable".
columns	WasmCombinedColumn[]	yes
cover	number	yes
fPrimeC	number	yes
fPrimeCColumn	number		Default: 0.
fSy	number	yes
footingBx	number	yes
footingBy	number	yes
footingH	number	yes
qBearing	number	yes
selfWeight	number		Default: 0.
standard	FootingCode		Default: "as3600".

Result: WasmCombinedFootingResult

Result fields

Field	Type	Required	Description
aStBottomReq	number	yes
aStMin	number	yes
aStTopReq	number	yes
aStTransverseReq	number	yes
checksRefused	string[]	yes
contactState	string	yes
governing	string	yes
mHog	number	yes
mSag	number	yes
mTransverse	number	yes
note	string | null
phiVPunch	number	yes
phiVUc	number	yes
qAllowable	number	yes
qMax	number	yes
resultantX	number	yes
utilBearing	number	yes
utilBearingStress	number	yes
utilDevelopment	number	yes
utilMax	number	yes
utilMoment	number	yes
utilPunching	number	yes
utilShear	number	yes
utilTransverse	number	yes
vDesign	number	yes
vPunch	number	yes

footing_fe_pressure

Plate-on-Winkler FE soil pressure over the pad plan (the mat/raft path). SI in, kPa out. Returns the nodal pressure grid, peak/min, Wood-Armer design-moment peaks (kNm/m), a global-equilibrium self-check, convergence flag, and any solver/mesh warnings - so the caller shows the FE field BESIDE the rigid field (never instead of it) with its honest caveats attached.

footing_fe_pressure(json_input: &str) -> String

Input json_input: WasmFootingFeInput

Field	Type	Required	Description
bx	number	yes
by	number	yes
cx	number		Default: 0.4.
cy	number		Default: 0.4.
e_concrete	number		Default: 30000000000.
ks	number	yes
mx	number		Default: 0.
my	number		Default: 0.
n	number	yes
nu	number		Default: 0.2.
nx	integer		Default: 12.
ny	integer		Default: 12.
self_weight	number		Default: 0.
thickness	number	yes

Result: untyped (JSON built with json!, no Rust type)

footing_pressure_field

Rigid soil-pressure field over the footing plan, for the contour view. SI in, kPa out. A refused state (NaN) serialises to JSON null so the renderer can never read a refusal as zero pressure.

footing_pressure_field(json_input: &str) -> String

Input json_input: WasmPressureFieldInput

Field	Type	Required	Description
bx	number	yes
by	number	yes
mx	number	yes
my	number	yes
n	number	yes
nx	integer		Default: 25.
ny	integer		Default: 25.

Result: untyped (JSON built with json!, no Rust type)

footing_size_for_bearing

Sizes a pad footing plan for the allowable bearing pressure.

footing_size_for_bearing(json_input: &str) -> String

Input json_input: WasmFootingSizeInput

Field	Type	Required	Description
aspect	number		by/bx. Defaults to 1.0 (square). Default: 0.
footingH	number		Footing thickness, m, so self-weight can grow with the plan area inside the loop. Default: 0.
mxService	number		Default: 0.
myService	number		Default: 0.
nService	number	yes	Unfactored vertical load, kN. Bearing is a working-stress check.
qAllowable	number	yes	Allowable bearing pressure, kPa. Already factored if the caller's basis was "ultimate".

Result: WasmFootingSizeResult

Result fields

Field	Type	Required	Description
bx	number	yes
by	number	yes
converged	boolean	yes
note	string | null
qMax	number	yes
util	number	yes

geo_classify_point

Classify a georeferenced point against a set of polygons (a loaded region / soil-zone layer). Returns every polygon the point falls in, in input order: { point, matches: [{name, class}], count }. No hazard data is embedded - the polygons are always supplied by the caller.

geo_classify_point(json_input: &str) -> String

Input json_input: WasmGeoClassifyInput

Field	Type	Required	Description
point	number[]	yes	Query point [lon, lat].
polygons	GeoPolygon[]		Candidate polygons (name, optional class attribute, GeoJSON rings). Default: [].

Result: any

grade_beam_design

Strip / grade beam on an elastic foundation - the LONGITUDINAL span between a line of columns, which strip_footing_design does not cover.

grade_beam_design(json_input: &str) -> String

Input json_input: WasmGradeBeamInput

Field	Type	Required	Description
columns	WasmGradeBeamColumn[]	yes
cover	number	yes
fPrimeC	number	yes
fSy	number	yes
ks	number	yes	Modulus of subgrade reaction, N/m^3. Geotechnical; no default - see grade_beam.rs.
length	number	yes
nElements	integer		Default: 0.
standard	FootingCode		Concrete design code for the longitudinal flexure design. Omitted -> AS 3600, so a payload without a standard designs exactly as before. Default: "as3600".
thickness	number	yes
width	number	yes

Result: WasmGradeBeamResult

Result fields

Field	Type	Required	Description
aStBottomReq	number	yes
aStMin	number	yes
aStTopReq	number	yes
checksRefused	string[]	yes
lambdaL	number	yes
mHog	number	yes
mSag	number	yes
note	string | null
qMax	number	yes
qMaxAt	number	yes
rigidity	string	yes
settlementMax	number	yes
utilMoment	number	yes
vMax	number	yes

pad_footing_design

Isolated pad footing: bearing under biaxial moment, AS 3600 flexure, one-way and punching shear.

pad_footing_design(json_input: &str) -> String

Input json_input: WasmPadFootingInput

Field	Type	Required	Description
asDowelProvided	number		Default: 0.
asProvidedX	number		Default: 0.
asProvidedY	number		Default: 0.
barDiameter	number		Default: 0.
bearingBasis	string		Default: "allowable".
columnBx	number	yes
columnBy	number	yes
columnEx	number		Default: 0.
columnEy	number		Default: 0.
columnPosition	string		Default: "interior".
cover	number	yes
designSection	DesignSection		Default: {"kind":"face"}.
fPrimeC	number	yes
fPrimeCColumn	number		Default: 0.
fSy	number	yes
footingBx	number	yes
footingBy	number	yes
footingH	number	yes
mxService	number		Default: 0.
mxStar	number	yes
myService	number		Default: 0.
myStar	number	yes
nService	number		Default: 0.
nStar	number	yes
pedestalHeight	number		Default: 0.
phiBaseDeg	number		Default: 30.
qBearing	number	yes
reinfClass	ReinforcementClass		Default: "n".
reinforced	boolean		Default: true.
selfWeight	number		Default: 0.
standard	FootingCode		Default: "as3600".
vStar	number		Default: 0.

Result: WasmPadFootingResult

Result fields

Field	Type	Required	Description
aSDowelReq	number	yes
aStMin	number	yes
aStXProvided	number	yes
aStXReq	number	yes
aStYProvided	number	yes
aStYReq	number	yes
bearingStressCapacity	number	yes
bearingStressDemand	number	yes
checksRefused	string[]	yes
contactState	string	yes
cornerPressures	number[]	yes
dEff	number	yes
developmentAvailableM	number	yes
developmentDetail	string	yes
developmentLstM	number	yes
governing	string	yes
infinite	string[]	yes	Utilisation fields that are +Infinity (a decided failure), which JSON would otherwise turn into null and so into "not evaluated". The JS adapter restores them.
kUoX	number	yes
kUoY	number	yes
mXDesign	number	yes
mYDesign	number	yes
note	string | null
overturningE	number	yes
overturningELimit	number	yes
phiBendingX	number	yes
phiBendingY	number	yes
phiVPunch	number	yes
phiVUc	number	yes
plain	WasmPlainConcreteCheck | null		Present only when the caller asked for an UNREINFORCED footing; null otherwise, which is what every existing caller sees.
punchingPerimeter	number	yes
qAllowable	number	yes
qMax	number	yes
slidingResistance	number	yes
thicknessRequired	number	yes
utilBearing	number	yes
utilBearingStress	number	yes
utilDevelopment	number	yes
utilDowelDevelopment	number	yes
utilDowelTension	number	yes
utilMax	number	yes
utilMomentX	number	yes
utilMomentY	number	yes
utilOverturning	number	yes
utilPedestal	number	yes
utilPunching	number	yes
utilShear	number	yes
utilSliding	number	yes
vPunch	number	yes
vUc	number	yes
vX	number	yes
vY	number	yes

pedestal_design

RC pedestal on a footing: axial and biaxial bending capacity to AS 3600.

pedestal_design(json_input: &str) -> String

Input json_input: PedestalInput

Field	Type	Required	Description
aScTotal	number	yes	TOTAL longitudinal steel area Asc (mm^2), summed over all bars.
barDia	number	yes	Longitudinal bar diameter (mm) - to place the bar centroid off the cover.
braced	boolean	yes	Whether the pedestal is braced against sidesway (Cl 10.3.1). Pedestals are normally braced by the surrounding construction; braced uses the Le/r < 25 limit, unbraced Le/r < 22.
cover	number	yes	Clear cover to the longitudinal bars (mm).
dcX	number	yes	Pedestal plan dimension along global X (mm).
dcY	number	yes	Pedestal plan dimension along global Y (mm).
fPrimeC	number	yes	Concrete characteristic strength f'c (MPa).
fPrimeCBearing	number	yes	Concrete strength at the bearing interface (MPa) - the weaker of the bearing member and the pedestal. Zero means "use the pedestal f'c" (Cl 12.6 takes the weaker of the two concretes).
fSy	number	yes	Reinforcement yield strength fsy (MPa).
height	number	yes	Pedestal height (mm) - used by the (deferred) slenderness classification.
kEff	number	yes	Effective length factor k (Cl 10.5.3). Le = k * height. Default 1.0 is conservative (a pedestal fixed into the footing has a lower k, so 1.0 over-estimates slenderness, which only makes the short-column test stricter - the safe direction, since a slender pedestal is refused).
loadBx	number	yes	Loaded bearing footprint on the pedestal TOP along X (mm) - the steel column or base plate. Zero means "not supplied", and the Cl 12.6 bearing check is then reported NotDetermined.
loadBy	number	yes	Loaded bearing footprint on the pedestal top along Y (mm).
mxStar	number	yes	Design moment about the global X axis (N·mm).
myStar	number	yes	Design moment about the global Y axis (N·mm).
nStar	number	yes	Design axial load N* (N), compression positive.

Result: PedestalResult

Result fields

Field	Type	Required	Description
adequate	boolean | null		Some(true/false) once every check is determined; None while any check is NotDetermined, because an undetermined check cannot be certified adequate.
bearing	CheckState	yes	Cl 12.6 bearing at the loaded interface. Ok when util <= 1; NotDetermined when no loaded area was supplied (bearing cannot be checked without it).
bearingUtil	number	yes	Cl 12.6 bearing utilisation at the loaded interface (NaN when not determined).
fitmentMaxSpacing	number	yes	Cl 10.7.4.3(b)(i): maximum fitment spacing = min(Dc, 15.db) for single bars (mm).
fitmentMinDia	number	yes	Cl 10.7.4.3(a) Table: minimum fitment/tie bar diameter for the longitudinal bar size (mm).
fitments	CheckState	yes	Cl 10.7.3/10.7.4 fitments. Ok = the detailing requirement is determined (min fitment diameter + max spacing below); it states what to provide, not a demand pass/fail.
phiMN	number	yes	Bending capacity at the applied axial load phi.Mn (N·mm) for the governing axis.
phiNuo	number	yes	Squash-load capacity phi.Nuo (N) for the governing axis.
reducedMinPermitted	boolean	yes	Cl 10.7.1(a) proviso: a reduced minimum is permitted when Ag.fsy > 0.15 N*.
slenderness	CheckState	yes	Cl 10.3.1 short-column classification. Ok = short (the M-N check above is valid with slenderness moments taken as zero); NotAdequate = slender (needs the Cl 10.4 moment magnifier, which this module does not perform - the pedestal is refused rather than designed unsafely).
slendernessLimit	number	yes	The short-column limit applied (25 braced / 22 unbraced), Cl 10.3.1.
slendernessRatio	number	yes	Slenderness ratio Le/r (Cl 10.3.1, r per Cl 10.5.2) on the most slender axis.
steelMax	CheckState	yes	Cl 10.7.1(b): Asc <= 0.04 Ag.
steelMin	CheckState	yes	Cl 10.7.1(a): Asc >= 0.01 Ag.
steelRatio	number	yes	Longitudinal steel ratio Asc/Ag.
utilInteraction	number	yes	Governing M-N interaction utilisation (Cl 10). <= 1.0 is adequate.

pile_design

Single pile or bored pier: geotechnical axial capacity (shaft and base) from a soil profile.

pile_design(json_input: &str) -> String

Input json_input: PileInput

Field	Type	Required	Description
diameter	number	yes	Pile shaft diameter (m). The tip is at the bottom of the last layer (embedded length = sum of the layer thicknesses).
driven	boolean	yes	Driven pile mobilises higher lateral stress on the shaft than a bored one (K factor).
gammaConcrete	number		Concrete unit weight for the pier's own weight (kN/m^3), 24 by default; buoyant below the WT. Default: 24.
hStar	number		Design lateral load at the pier head (kN), applied load_height above ground. 0 = no check. Default: 0.
layers	PileSoilLayer[]	yes	Soil profile, top-down; the pile is embedded through all of it.
loadHeight	number		Height of the lateral load above ground level (m): the base plate height, or 0 at grade. Default: 0.
nStar	number	yes	Design axial compression N* (kN). 0 -> utilisation reported as 0.
nUplift	number		Design uplift (tension) load on the pier (kN). 0 = no check. Default: 0.
phiG	number	yes	AS 2159 geotechnical strength reduction factor phi_g (from the risk assessment, ~0.40-0.65).
tensionShaftFactor	number		Fraction of the compression shaft resistance mobilised in tension (0.7 by default). Default: 0.7.
waterTable	number	yes	Depth to the water table (m from the surface); large = dry.

Result: PileResult

Result fields

Field	Type	Required	Description
baseUltimate	number	yes	Ultimate base (end bearing) resistance (kN).
design	number	yes	Design geotechnical strength Rd,g = phi_g . Rd,ug (kN).
embeddedLength	number	yes	Embedded length (m) = sum of layer thicknesses.
lateralDesign	number	yes	Lateral: design lateral resistance phi_g x H_u (kN).
lateralMethod	string	yes	"broms-cohesive" or "broms-cohesionless".
lateralMomentAtHStar	number	yes	Lateral: the moment in the pier under H* (Broms scales with the load), kNm.
lateralMomentDepth	number	yes	Lateral: depth below ground to the maximum moment (m).
lateralMomentUltimate	number	yes	Lateral: maximum bending moment in the pier at the ultimate lateral load (kNm), for the section check; scaled to H* in lateral_moment_at_h_star.
lateralSoil	string	yes	The idealised soil the lateral check used: c_u (kPa) or phi' (deg) and gamma' (kN/m^3).
lateralUltimate	number	yes	Lateral: Broms ultimate lateral load at the head (kN).
pierWeight	number	yes	Uplift: the pier's own weight (kN), buoyant below the water table.
shaftUltimate	number	yes	Ultimate shaft (skin friction) resistance (kN).
ultimate	number	yes	Ultimate geotechnical strength Rd,ug = shaft + base (kN).
upliftDesign	number	yes	Uplift: design resistance = phi_g x tension shaft + pier weight (the weight is not a geotechnical strength and takes no phi_g) (kN).
upliftShaftUltimate	number	yes	Uplift: shaft resistance in tension (kN) = tension_shaft_factor x compression shaft.
upliftUltimate	number	yes	Uplift: ultimate resistance = tension shaft + pier weight (kN).
util	number	yes	Utilisation N* / Rd,g (NaN when no capacity).
utilLateral	number	yes	Lateral utilisation H* / lateral_design (NaN when not asked).
utilUplift	number	yes	Uplift utilisation N_uplift / uplift_design (NaN when not asked).
verified	boolean	yes
warnings	string[]	yes

pilecap_design

Pile cap: rigid-cap distribution of the column load and moments to the piles, and pile capacity and uplift checks.

pilecap_design(json_input: &str) -> String

Input json_input: PileCapInput

Field	Type	Required	Description
barDia	number		Main bar diameter (mm) - to place the bar centroid and set the effective depth. Default: 0.
capBx	number		Cap plan dimensions (mm). Default: 0.
capBy	number		Default: 0.
capThickness	number		Cap overall thickness (mm). Default: 0.
capWeight	number	yes	Cap self-weight + soil overburden (N), added to the axial as uniform compression. 0 to ignore.
columnBx	number		Column footprint on the cap (mm) - the flexure/shear critical sections start at the column face. Default: 0.
columnBy	number		Default: 0.
cover	number		Cover to the main (bottom) bars (mm). Default: 0.
fPrimeC	number		Cap concrete strength f'c (MPa). Default: 0.
fSy	number		Reinforcement yield strength fsy (MPa). Default: 0.
mxStar	number	yes	Column design moment about the global X axis (N.m).
myStar	number	yes	Column design moment about the global Y axis (N.m).
nStar	number	yes	Column design axial N* (N), compression positive.
pileCapCompression	number	yes	Single-pile capacity in compression (N). <= 0 => the compression check is NotDetermined.
pileCapTension	number	yes	Single-pile capacity in tension / uplift (N), positive magnitude. 0 means the piles are taken as unable to carry tension, so any uplift fails.
pileDia	number		Pile diameter/side (mm) - the loaded area for the pile-punching check. 0 -> pile punching is not checked (NotDetermined), but column punching still is. Default: 0.
piles	number[][]	yes	Pile plan positions (m), measured from the COLUMN / load point (any consistent origin - the centroid is computed from these).
standard	FootingCode		The concrete design standard (AS 3600 default / ACI 318 / Eurocode 2) for the SHALLOW-cap concrete checks (flexure Cl 8.1, one-way shear Cl 8.2, punching Cl 9.3). Omitted -> AS 3600, so every existing payload is unchanged. The DEEP-cap strut-and-tie model (Section 7) is AS 3600 regardless of this field - a per-code strut-and-tie is out of scope (see strut_and_tie). Default: "as3600".

Result: PileCapResult

Result fields

Field	Type	Required	Description
adequate	boolean | null		Some(true/false) only when the APPLICABLE method is fully checked: a shallow cap by the flexural model (flexure + one-way shear + punching), a deep cap by strut-and-tie. None when the governing method's checks are not all determined (missing geometry) - a deep cap is never certified on the conservative beam model.
capAstReq	number	yes
capFlexure	CheckState	yes	Cap FLEXURE at the column face (AS 3600 Cl 8.1). Ok when the section can carry the design moment (steel found); NotAdequate when it cannot; NotDetermined when no cap geometry supplied.
capMStar	number	yes	Governing design moment at the column face (N.mm) and the required bottom steel (mm^2, total across the cap width) in that direction.
capPunching	CheckState	yes	Cap PUNCHING (Cl 9.3): the worst of column punching (the column into the cap) and pile punching (a pile up through the cap, with free-edge perimeter truncation for edge/corner piles). Ok when the worst util <= 1. NotDetermined when no cap geometry.
capPunchingUtil	number	yes
capShear	CheckState	yes	Cap one-way (beam) SHEAR at d from the column face (Cl 8.2). Ok when V* <= phi.Vuc.
capShearUtil	number	yes
compressionCheck	CheckState	yes	Cl-independent capacity checks.
compressionUtil	number	yes	Compression utilisation = max_reaction / pile_cap_compression.
deepCap	boolean	yes	True when the cap is DEEP - the nearest pile centre is within the effective depth of the column face (a_v <= d). The flexural/beam-shear model is then conservative or inapplicable and the strut-and-tie model (Section 7) governs; strut_tie is that check.
maxReaction	number	yes	Largest compression reaction (N).
minReaction	number	yes	Smallest reaction (N) - negative means uplift.
reactions	number[]	yes	Per-pile axial reaction (N), compression positive, in the input pile order.
strutTie	CheckState	yes	Deep-cap STRUT-AND-TIE model (AS 3600:2018 Section 7). Ok when the model is valid (every strut-to-tie angle >= 30 deg, Cl 7 item (g)) and the strut concrete is adequate; NotAdequate when an angle is too shallow or a strut over-stresses; NotDetermined without the geometry.
strutTieAstReq	number	yes	Required bottom TIE steel Ast (mm^2) in the governing direction = T / (0.85 fsy), Cl 7.3.
strutTieMinAngleDeg	number	yes	Minimum strut-to-tie angle (deg) - below 30 the STM is not permitted.
strutTieUtil	number	yes	Worst strut concrete-stress utilisation (Cl 7.2.3, phi_st 0.65, beta_s Cl 7.2.2) at the pile node.
uplift	boolean	yes	True when any pile is in tension (min_reaction < 0).
upliftCheck	CheckState	yes
upliftUtil	number	yes	Uplift utilisation = |min_reaction| / pile_cap_tension when uplift occurs (else 0). Infinite when a pile lifts but no tension capacity was given.

raft_design

Raft/mat reinforcement at a point from its plate moment field (Mx, My, Mxy per metre): the Wood-Armer design moments and the required steel each face/direction (mm^2/m), None where a 1 m strip cannot carry the moment. Puts the raft reinforcement engine on a real, tested call path.

raft_design(json_input: &str) -> String

Input json_input: RaftPointInput

Field	Type	Required	Description
d	number	yes	Effective depth (mm), concrete strength (MPa), steel yield (MPa).
fPrimeC	number	yes
fSy	number	yes
mx	number	yes	Plate bending + twisting moments per metre (N.mm/m): Mx, My, Mxy.
mxy	number	yes
my	number	yes

Result: RaftReo

Result fields

Field	Type	Required	Description
astXBottom	number | null		Bottom/top steel in the X and Y directions, mm^2/m. None = the section cannot carry that moment.
astXTop	number | null
astYBottom	number | null
astYTop	number | null
design	WoodArmer	yes	The Wood-Armer design moments used (per metre: N.mm/m).

raft_fe_design

Task 9: the single UI-facing export that turns a polygon raft footprint + column loads into a DESIGNED mat. RaftDesignResult (raft_design::raft_design, Task 7) carries the per-node reinforcement, per-column punching, and ks-envelope, but NOT the mesh/pressure/resultant FIELDS - those live on RaftFeResult (footing_fe::raft_fe_solve, Task 5/6). Neither call alone is the complete answer a UI panel needs, so both run here and are combined into one JSON object. The nominal-ks FE is solved twice this way (once directly for the fields, once again inside raft_design's ks-envelope sweep) - a deliberate, documented duplication (correctness/honesty over a micro-optimisation), not an oversight. HONESTY: verified is hardcoded false - this whole path (mesh -> Winkler FE -> Wood-Armer -> AS 3600 flexure/punching -> ks-envelope) has not been checked end-to-end against an independent worked raft example. Every Option<f64> (the four Ast faces, punching vStar/phiVu/ utilisation) serialises None as JSON null - never a fabricated 0 or a fake pass - and the punching position/warning fields are surfaced verbatim (reshaping vStar/phiVu from N to kN for UI unit consistency, everything else passed through) so an edge/corner column that refused a non-conservative interior-perimeter capacity (see raft_design's module docs) reaches the UI, not just the Rust console. A MeshError from either solve (degenerate/self-intersecting polygon, non-terminating refinement) returns {"error": "mesh: ..."} - a NotDetermined refusal, never a fake mesh; a JSON parse failure returns {"error": "Parse error: ..."}, mirroring footing_fe_pressure above. Neither error path panics on degenerate input.

raft_fe_design(json_input: &str) -> String

Input json_input: WasmRaftFeInput

Field	Type	Required	Description
columns	ColumnLoad[]	yes
dEff	number	yes
eConcrete	number		Default: 30000000000.
fPrimeC	number	yes
fSy	number	yes
fidelity	MeshFidelity		Default: "light".
holes	number[][][]		Default: [].
ks	number	yes
ksHi	number	yes
ksLo	number	yes
nu	number		Default: 0.2.
outer	number[][]	yes
selfWeight	number		Default: 0.
thickness	number	yes

Result: untyped (JSON built with json!, no Rust type)

raft_fe_solve

Unstructured-mesh (MITC3) raft-on-Winkler-springs FE solve (Task 5/6 path) - arbitrary polygon footprint, multiple column loads, and (Task 6) per-node recovered resultant fields (mx/my/mxy/vx/vy). Input/output are RaftFeInput/RaftFeResult (fem_core::footing_fe) directly, since both now derive Serialize/Deserialize - no separate Wasm-facing struct needed, unlike the structured footing_fe_pressure above (which predates this and reshapes units/naming for the JS UI). This export exists for Experiment E3b (the OpenSees differential oracle, web_demo/tests/raft_oracle_check.mjs) - it is not yet wired into any Studio UI panel.

raft_fe_solve(json_input: &str) -> String

Input json_input: RaftFeInput

Field	Type	Required	Description
columns	ColumnLoad[]	yes
e_concrete	number	yes
ks	number	yes
nu	number	yes
poly	Polygon	yes
self_weight	number	yes
sizing	SizingField	yes
thickness	number	yes

Result: RaftFeResult

Result fields

Field	Type	Required	Description
applied_load	number	yes
converged	boolean	yes
equilibrium_error	number	yes
mesh	Mesh2d	yes
mx_nodes	number[]	yes
mxy_nodes	number[]	yes
my_nodes	number[]	yes
q_max	number	yes
q_min	number	yes
q_nodes	number[]	yes
sum_reaction	number	yes
uz_nodes	number[]	yes
vx_nodes	number[]	yes
vy_nodes	number[]	yes
warnings	string[]	yes

retaining_wall_design

Cantilever retaining wall: active pressure, sliding, overturning and bearing (AS/NZS 1170.0 factors), and AS 3600 stem and heel reinforcement.

retaining_wall_design(json_input: &str) -> String

Input json_input: WasmRetainingWallInput

Field	Type	Required	Description
baseThickness	number	yes
baseWidth	number	yes
cover	number	yes
fPrimeC	number	yes
fSy	number	yes
gammaSoil	number	yes
gamma_conc	number		Default: 24.
ka	number	yes
phi_base_deg	number		Default: 30.
qAllowable	number	yes
stemThicknessBase	number	yes
stemThicknessTop	number	yes
toeLength	number	yes
wallHeight	number	yes

Result: WasmRetainingWallResult

Result fields

Field	Type	Required	Description
eccentricity	number	yes
governing	string	yes
heelAst	number	yes
heelMoment	number	yes
overturningMoment	number	yes
pa	number	yes
paHeight	number	yes
qMax	number	yes
qMin	number	yes
restoringMoment	number	yes
resultantX	number	yes
slidingResistance	number	yes
stemAst	number	yes
stemMoment	number	yes
utilBearing	number	yes
utilHeel	number	yes
utilMax	number	yes
utilOverturning	number	yes
utilSliding	number	yes
utilStem	number	yes

settlement_design

Shallow-foundation settlement: immediate (elastic) plus primary consolidation, from the soil profile given.

settlement_design(json_input: &str) -> String

Input json_input: SettlementInput

Field	Type	Required	Description
b	number	yes	Footing plan dimensions (m). The least dimension is used as B in the elastic formula.
cc	number	yes	Compression index Cc (virgin line slope).
cr	number	yes	Recompression index Cr (unload-reload slope). 0 falls back to Cc when overconsolidated.
depthFactor	number	yes	Embedment (depth) correction factor I_F (<= 1), Fox's correction. 1.0 (default/conservative) ignores the reduction from founding below the surface.
e0	number	yes	Initial void ratio e0.
eSoil	number	yes	Soil drained (long-term) or undrained elastic modulus for the immediate part (kPa).
hLayer	number	yes	Compressible layer thickness (m). <= 0 means "no consolidation layer" -> ConsolState::NotComputed.
l	number	yes
nuSoil	number	yes	Soil Poisson's ratio (-).
qNet	number	yes	Net applied bearing pressure at founding level (kPa) - the pressure ABOVE the pre-existing overburden, which is what drives settlement.
sigmaPc	number	yes	Preconsolidation pressure sigma'_p (kPa). <= sigma'_0 is treated as normally consolidated.
sigmaV0	number	yes	Initial vertical effective stress at mid-layer, sigma'_0 (kPa).
zToMid	number	yes	Depth from founding level to the MIDDLE of the compressible layer (m), where the representative stress increase is evaluated.

Result: SettlementResult

Result fields

Field	Type	Required	Description
consolState	ConsolState	yes	Which e-log(sigma') branch was used (or NotComputed).
consolidation	number	yes	Primary consolidation settlement (mm); 0 with state NotComputed when there is no layer.
deltaSigmaMid	number	yes	Stress increase at mid-layer from the 2:1 spread, delta-sigma (kPa).
immediate	number	yes	Immediate (elastic) settlement (mm).
total	number	yes	Total settlement (mm) = immediate + consolidation.

strip_footing_design

Strip footing under a wall or column line: bearing, AS 3600 flexure and one-way shear.

strip_footing_design(json_input: &str) -> String

Input json_input: WasmStripFootingInput

Field	Type	Required	Description
asLongProvided	number		Longitudinal steel provided EACH face, mm^2 (0 = check against max(required, minimum)). Default: 0.
asProvided	number		Default: 0.
barDiameter	number		Default: 0.
bearingBasis	string		Default: "allowable".
cover	number	yes
fPrimeC	number	yes
fSy	number	yes
longitudinalBarDiameter	number		Default: 0.
longitudinalSpan	number		Length of lost support the strip spans along the wall, m (0 = not designed). Default: 0.
mService	number		Default: 0.
mStar	number		Default: 0.
nService	number		Default: 0.
nStar	number	yes
qBearing	number	yes
reinforced	boolean		false = an unreinforced strip, checked to AS 3600 Section 20 across its width. Default: true.
selfWeight	number		Default: 0.
standard	FootingCode		Default: "as3600".
stripThickness	number	yes
stripWidth	number	yes
wallThickness	number	yes

Result: WasmStripFootingResult

Result fields

Field	Type	Required	Description
aStMin	number	yes
aStReq	number	yes
checksRefused	string[]	yes
contactState	string	yes
dEff	number	yes
developmentDetail	string	yes
developmentLst	number	yes
governing	string	yes
kUo	number	yes
longitudinal	WasmStripLongitudinal | null		The design along the wall, present only when a span of lost support was given.
mDesign	number	yes
note	string | null
phiBending	number	yes
phiVUc	number	yes
plain	WasmPlainConcreteCheck | null		The Section 20 checks, present only for an unreinforced strip.
qAllowable	number	yes
qMax	number	yes
qMin	number	yes
utilBearing	number	yes
utilDevelopment	number	yes
utilMax	number	yes
utilMoment	number	yes
utilShear	number	yes
vDesign	number	yes

Loads, wind and seismic

as1170_1_imposed

AS/NZS 1170.1:2002 Table 3.1 lookup: { category, use } (a substring of the specific-use wording) -> the matching row, or an error naming what was not found. The psi occupancy suggested by the row's category (A/B floors -> office/residential, C3-C5/D/E -> storage/other, roofs -> roof rows) is left to the caller/UI to suggest, never forced here.

as1170_1_imposed(json_input: &str) -> String

Input json_input: WasmImposedInput

Field	Type	Required	Description
category	string	yes
use	string		Default: "".

Result: ImposedRow

Result fields

Field	Type	Required	Description
category	string	yes
note	string	yes
point_kn	number | null
udl_kpa	number | null
use_	string	yes

as1170_design_spectrum

AS 1170.4:2024 Cl 7.2 horizontal design response spectrum, as the (period, acceleration) table the modal response-spectrum solver takes.

as1170_design_spectrum(json_input: &str) -> String

Input json_input: WasmSpectrumInput

Field	Type	Required	Description
annual_probability	number | null		Default: null.
location	string | null		Default: null.
mu	number | null		Default: null.
soil	string		Default: "".
sp	number | null		Default: null.
system	string | null		Default: null.
z	number | null		Default: null.

Result: any

as1170_dynamic_base_shear_floor

AS 1170.4:2024 Cl 7.2: the floor under a dynamic analysis's base shear. A modal analysis under-predicts base shear whenever the modes it keeps miss mass. The clause requires the design base shear to be at least 70 percent (50 above 50 m) of the equivalent-static value computed with the period from Eq 6.2(7), and requires every design action AND DISPLACEMENT to be scaled by k when it is not. The displacement half is the part that gets forgotten, so the result says it.

as1170_dynamic_base_shear_floor(json_input: &str) -> String

Input json_input: WasmDynamicFloorInput

Field	Type	Required	Description
annual_probability	number | null		Default: null.
height_m	number	yes
kt	number | null		Eq 6.2(7) inputs: kt and the structure height hn, metres. Default: null.
location	string | null		Default: null.
mu	number | null		Default: null.
soil	string		Default: "".
sp	number | null		Default: null.
system	string | null		Default: null.
v_dynamic	number	yes	The base shear the dynamic analysis produced, newtons.
weight	number	yes	Seismic weight Wt, newtons - the same mass the dynamic analysis used.
z	number | null		Default: null.

Result: any

as1170_open_wind

AS/NZS 1170.2 wind on open structures: hoardings, free-standing walls and free roofs (Appendix B).

as1170_open_wind(json_input: &str) -> String

Input json_input: WasmOpenWindInput

Field	Type	Required	Description
alpha_deg	number		Default: 0.
b	number		Default: 0.
blockage	number		Default: 0.
c	number		Default: 0.
case	string		Default: "".
cp_e	number		Default: 0.
d	number		Default: 0.
enclosure	string		Default: "".
friction	string		Default: "".
h	number		Default: 0.
hc	number		Default: 0.
k_l	number		Default: 1.
kind	string	yes
m_d	number		Default: 1.
m_s	number		Default: 1.
m_t	number		Default: 1.
parallel	boolean		Default: false.
parapet_hp	number | null		Default: null.
region	string		Default: "A".
return_corner	boolean		Default: false.
return_period_years	number		Default: 500.
roof	string		Default: "".
slope_deg	number		Default: 0.
solidity	number		Default: 1.
terrain	string		Default: "TC2".
tributary_area_m2	number		Default: 10.
wc	number		Default: 0.
wind	string		Default: "".

Result: untyped (JSON built with json!, no Rust type)

as1170_open_wind_tables

Every table cell wind_as1170_open.rs carries, for the ledger check.

as1170_open_wind_tables() -> String

Result: untyped (no typed serialisation found)

as1170_part_force

AS 1170.4:2024 Section 8: the earthquake force on a non-structural part or component.

as1170_part_force(json_input: &str) -> String

Input json_input: WasmPartInput

Field	Type	Required	Description
annual_probability	number | null
ductility	string		"flexible-ductile", "rigid", "non-ductile" or "connection" (Cl 8.2). Default: "".
floor_acceleration	number | null		Cl 8.2(1): effective floor acceleration at the component's level, as a fraction of g. It is floored at k_p Z C_h(0) by the clause, and the result says whether that floor applied. Default: null.
hn_m	number | null		Cl 8.3: total height of the structure above the structural base, metres. Default: null.
hx_m	number | null		Cl 8.3: height at which the component is attached above the structural base, metres. Default: null.
importance	string		"importance-level-4", "life-safety-critical" or "other" (Cl 8.2). Default: "".
location	string | null		Table 3.2 location name, or pass z directly from Figure 3.2. Default: null.
mechanical_or_electrical	boolean		Cl 8.1.3: a mechanical or electrical component also takes a vertical force of half the horizontal one, NOT acting at the same time. Set this and the result carries it. Default: false.
method	string		Default: "".
mounting	string		"flexible-spring-mechanical" or "other" (Cl 8.2). Default: "".
soil	string	yes	Site sub-soil class Ae to Ee; Table 6.4's BRACKETED Ch(0) is the one Section 8 uses.
weight_n	number	yes	W_c, the component's seismic weight, in NEWTONS.
z	number | null		Default: null.

Result: WasmPartResult

Result fields

Field	Type	Required	Description
a_c	number	yes
a_floor	number	yes
acceleration_floored	boolean	yes
bound	string	yes	"computed", "lower" (0.05 W_c governed) or "upper" (0.5 W_c governed).
clause	string	yes
force_n	number	yes
height_amplification	number | null
i_c	number	yes
r_c	number	yes
unbounded_n	number	yes
vertical_n	number | null		Cl 8.1.3's vertical force, when the component is mechanical or electrical. It is an ALTERNATIVE load case to the horizontal force, never an addition to it.

as1170_portal_wind

AS/NZS 1170.2 wind pressures on a portal frame building, including dominant openings.

as1170_portal_wind(json_input: &str) -> String

Input json_input: WasmPortalWindInput

Field	Type	Required	Description
alpha_deg	number		Default: 0.
b	number	yes
d	number	yes
h_e	number	yes
m_d	number		Default: 1.
m_s	number		Default: 1.
m_t	number		Default: 1.
open_ratio	number		Default: 0.
opening	DominantOpening | null		Default: null.
region	string	yes
return_period_years	number		Default: 500.
roof	string		Default: "".
terrain	string	yes
trib	number		Default: 0.

Result: untyped (JSON built with json!, no Rust type)

as1170_seismic_base_shear

AS 1170.4 equivalent static base shear.

as1170_seismic_base_shear(json_input: &str) -> String

Input json_input: WasmSeismicInput

Field	Type	Required	Description
annual_probability	number | null
height_m	number | null		Default: null.
kt	number | null		Default: null.
location	string | null		Default: null.
mu	number | null		Default: null.
period	number | null		Default: null.
r_u	number | null		Default: null.
s_p	number | null		Default: null.
soil	string	yes
sp	number | null		Default: null.
system	string | null		Default: null.
weight	number	yes
z	number | null		Default: null.
zone	string | null		Default: null.

Result: WasmSeismicResult

Result fields

Field	Type	Required	Description
c_h	number	yes
cd	number	yes
citation	string	yes
floored	boolean	yes
kp	number	yes
kp_z_used	number	yes
mu	number	yes
sp	number	yes
t1	number	yes
v	number	yes
z	number	yes

as1170_snow_load

Table 5.2's named sites are NOT carried: the published table is a scan, and transcribing ground snow loads out of OCR would put invented numbers into designs. A request naming a site is refused with what to do instead.

as1170_snow_load(json_input: &str) -> String

Input json_input: WasmSnowInput

Field	Type	Required	Description
altitude_m	number		Height above the Australian Height Datum or New Zealand mean sea level, metres. Default: 0.
annual_probability	number | null		Annual probability of exceedance, as a fraction: 1/500 is 0.002 (Table 5.1). Default: null.
exposure	string		sheltered, semi-sheltered or windswept (Cl 4.2.2). Default: "".
location	string | null		A named Table 5.2 site, which this build does not carry: refused by name if given. Default: null.
region	string		AS/NZS 1170.3:2003 snow region: AS, AT, NzNorth, NzSouth (alpine); AN, AC, AsSub, AtSub (sub-alpine Australia); N1 to N5 (sub-alpine New Zealand). Default: "".
roof_pitch2_deg	number | null		The second slope of a duo-pitched roof; absent for a mono-pitched one. Default: null.
roof_pitch_deg	number		Roof slope, degrees. Default: 0.
terrain_factor	number | null		Terrain classification factor kt, Australian ALPINE regions only: 0.7, 1.0 or 1.3 (Cl 5.3). Default: null.

Result: RoofSnow

Result fields

Field	Type	Required	Description
balanced_only	boolean	yes
cases	SnowCase[]	yes
ce	number	yes
citation	string	yes
equation	string	yes
gamma_kn_m3	number	yes
kp	number	yes
overhang_kn_m	number	yes	Cl 4.2.3: the edge overhang load, kN per metre of eave, from the peak case.
peak_kpa	number	yes	The largest load any case puts on any slope, kPa - the number a first pass sizes to.
sg_kpa	number	yes

as1170_tables

The engine's AS/NZS 1170 tables, for the ledger. Extended by later tasks.

as1170_tables() -> String

Result: untyped (JSON built with json!, no Rust type)

as1170_wind_design

AS/NZS 1170.2 building wind design: pressures on each surface for the given building.

as1170_wind_design(json_input: &str) -> String

Input json_input: WasmWindDesignInput

Field	Type	Required	Description
alpha_deg	number		Default: 0.
b	number	yes
d	number	yes
h_e	number	yes
m_d	number		Default: 1.
m_s	number		Default: 1.
m_t	number		Default: 1.
open_ratio	number		Default: 0.
region	string	yes
return_period_years	number		Default: 500.
roof	string		Default: "".
terrain	string	yes

Result: WindDesign

Result fields

Field	Type	Required	Description
standard	string	yes
surfaces	SurfacePressure[]	yes
tables	TableStatus[]	yes	Per-table verification, the adapter's own statement (WindStandard::table_status).
trace	Step[]	yes
verified	boolean	yes	ALWAYS false until an engineer cross-checks the coefficient tables against the standard.
warnings	string[]	yes

as1170_wind_pressure

AS/NZS 1170.2 site wind speed and pressure for a region, terrain and height.

as1170_wind_pressure(json_input: &str) -> String

Input json_input: WasmWindInput

Field	Type	Required	Description
height	number	yes
region	string	yes
return_period_factor	number		Default: 1.
terrain	string	yes

Result: WasmWindResult

Result fields

Field	Type	Required	Description
mC	number	yes
mZcat	number	yes
p	number	yes
q	number	yes
vDes	number	yes
vR	number	yes

as1170_wind_tables

Full AS/NZS 1170.2 wind design: site speed -> q + per-surface shape factors + net pressures for theta=0 and theta=90, with a clause trace + verified:false warnings. Returns the serialised fem_core::wind_core::WindDesign. THE ENGINE'S WIND TABLES, TABULATED FOR THE LEDGER GATE (docs/reference/wind_validation.md, web_demo/tests/wind_ledger_check.mjs): every cell the standard prints, read back off the same functions the design uses, so the ledger's transcription of AS/NZS 1170.2:2021 is compared to what the product computes and not to a second copy of the numbers.

as1170_wind_tables() -> String

Result: untyped (JSON built with json!, no Rust type)

asce7_roof_pressure_coefficient

ASCE 7-22 Fig. 27.3-1: external pressure coefficient C_p for a roof.

asce7_roof_pressure_coefficient(json_input: &str) -> String

Input json_input: WasmAsce7RoofCpInput

Field	Type	Required	Description
dist_from_windward_edge_over_h	number		Distance from the windward edge divided by h. Used by the parallel-to-ridge case, which zones the roof by distance rather than by slope. Default: 0.
face	string	yes	"windward", "leeward" or "parallel" (wind parallel to the ridge).
h_over_l	number	yes	h/L - mean roof height over the plan dimension along the wind.
theta_deg	number	yes	Roof angle theta, degrees from horizontal.

Result: WasmAsce7CpResult

Result fields

Field	Type	Required	Description
c_p	number	yes
c_p_b	number | null		Design case B where Fig. 27.3-1 gives a second one; null when it does not. BOTH cases must be checked - B is often a downward pressure and governs different members from A.
clause	string	yes
uses	string	yes	"q_z" (point height, windward wall only) or "q_h" (mean roof height, everything else). The figure chooses this, not the caller.

asce7_surface_pressure

ASCE 7-22 Eq. 27.3-1: p = q G C_p on one surface.

asce7_surface_pressure(json_input: &str) -> String

Input json_input: WasmAsce7SurfacePressureInput

Field	Type	Required	Description
c_p	number	yes
g	number	yes	Gust-effect factor G, Section 26.11. NO DEFAULT: 0.85 is the rigid-building value and this build does not classify a model as rigid or flexible, so it must be supplied.
q_h_pa	number	yes	q_h, Pa - the velocity pressure at mean roof height.
q_z_pa	number	yes	q_z, Pa - the velocity pressure at the height of the point considered.
uses	string	yes	"q_z" or "q_h" - which velocity pressure the figure sends to this surface. Take it from the uses field of the coefficient call rather than choosing it.

Result: WasmAsce7SurfacePressureResult

Result fields

Field	Type	Required	Description
c_p	number	yes
clause	string	yes
g	number	yes
p_pa	number	yes	p = q G C_p, Pa. Positive acts toward the surface, negative away from it.
q_source	string	yes
q_used_pa	number	yes

asce7_velocity_pressure

ASCE 7-22 Eq. 26.10-1: q_z = 0.613 K_z K_zt K_d K_e V^2, SI. Every factor comes back beside the pressure, because a calc sheet has to show the working and a checker needs z_used_m - the 4.6 m floor of Table 26.10-1 note 1 means the height used is not always the height asked for. This is the VELOCITY pressure only. Pressure coefficients, gust factors and internal pressure are not carried yet, so nothing here is a design pressure on a surface.

asce7_velocity_pressure(json_input: &str) -> String

Input json_input: WasmAsce7VelocityPressureInput

Field	Type	Required	Description
basic_wind_speed_ms	number	yes	Basic wind speed V, m/s (Section 26.5 hazard maps).
exposure	string	yes	Exposure category letter: "B", "C" or "D" (Section 26.7).
ground_elevation_m	number		Ground elevation above mean sea level, m, for K_e. NOT the terrain gradient height. Default: 0.
k_d	number	yes	Wind directionality factor K_d, Table 26.6-1. 0.85 for buildings.
k_zt	number		Topographic factor K_zt, Section 26.8.2. 1.0 on flat terrain. Default: 1.
z_m	number	yes	Height above ground, m.

Result: WasmAsce7VelocityPressureResult

Result fields

Field	Type	Required	Description
clause	string	yes
k_d	number	yes
k_e	number	yes
k_z	number	yes
k_zt	number	yes
q_pa	number	yes
z_used_m	number	yes

asce7_wall_pressure_coefficient

ASCE 7-22 Fig. 27.3-1: external pressure coefficient C_p for a wall.

asce7_wall_pressure_coefficient(json_input: &str) -> String

Input json_input: WasmAsce7WallCpInput

Field	Type	Required	Description
face	string	yes	"windward", "side" or "leeward".
l_over_b	number	yes	L/B - plan dimension along the wind over the dimension across it.

Result: WasmAsce7CpResult

Result fields

Field	Type	Required	Description
c_p	number	yes
c_p_b	number | null		Design case B where Fig. 27.3-1 gives a second one; null when it does not. BOTH cases must be checked - B is often a downward pressure and governs different members from A.
clause	string	yes
uses	string	yes	"q_z" (point height, windward wall only) or "q_h" (mean roof height, everything else). The figure chooses this, not the caller.

distribute_seismic_forces

Distributes a seismic base shear up the height of the building (AS 1170.4).

distribute_seismic_forces(json_input: &str) -> String

Input json_input: WasmSeismicDistributionInput

Field	Type	Required	Description
baseShear	number	yes
direction	number[]	yes
distribution	DistributionRule		Which standard's vertical distribution rule: "as1170_4" (the default, and what every caller that predates this field gets) or "nzs1170_5". See DistributionRule in fem-core. Default: "as1170_4".
eccentricityFraction	number		AS 1170.4:2024 Cl 6.6: the accidental eccentricity as a fraction of the storey's plan dimension across the action. The clause says +/- 0.1b; 0.0 (the default) keeps the force at the nominal centre of mass. Both signs have to be run to find the adverse one. Default: 0.
loadCaseId	integer	yes
model	WasmModel	yes
period	number	yes
storeys	WasmStoreyDefinition[]		Default: [].
vertical_axis	string | null		Default: null.

Result: WasmSeismicDistributionResult

Result fields

Field	Type	Required	Description
k	number	yes
nodalLoads	WasmNodalLoad[]	yes
storeyForces	WasmStoreyForce[]	yes
sumForces	number	yes
totalBaseShear	number	yes

ec1_peak_velocity_pressure

EN 1991-1-4 Eq. 4.8: q_p(z) = [1 + 7 I_v(z)] (1/2) rho v_m(z)^2, SI. Every factor comes back beside the pressure so a calc sheet can show the working, including z_used_m - Table 4.1's z_min means the height used is not always the height asked for. THE NATIONAL ANNEX IS THE CALLER'S. rho, c_0 and k_I default to the EN's recommended values and are overridable; the basic wind velocity has no default at all, because there is no such thing as a default site. This carries the EN procedure, not any country's Annex data. Peak VELOCITY pressure only - c_pe, c_pi and c_s c_d are not carried, so this is not a pressure on a surface.

ec1_peak_velocity_pressure(json_input: &str) -> String

Input json_input: WasmEc1PeakVelocityPressureInput

Field	Type	Required	Description
c_0	number		Orography factor c_0(z). 1.0 where orography is not significant. Default: 1.
k_i	number		Turbulence factor k_I. A National Annex parameter; the EN recommends 1.0. Default: 1.
rho_kg_m3	number		Air density, kg/m3. A NATIONAL ANNEX parameter; the EN recommends 1.25. Default: 1.25.
terrain	string	yes	Terrain category label: "0", "I", "II", "III" or "IV" (Table 4.1).
v_b_ms	number	yes	Basic wind velocity v_b, m/s, from the national map (Section 4.2).
z_m	number	yes	Height above ground, m.

Result: WasmEc1PeakVelocityPressureResult

Result fields

Field	Type	Required	Description
c_0	number	yes
c_e	number	yes	q_p / q_b, EN's exposure factor c_e(z) - the number an engineer recognises at a glance.
c_r	number	yes
clause	string	yes
i_v	number	yes
q_b_pa	number	yes
q_p_pa	number	yes
v_m_ms	number	yes
z_used_m	number	yes

en1991_1_7_robustness

EN 1991-1-7 robustness: tie forces and the key-element requirements for the consequence class.

en1991_1_7_robustness(json_input: &str) -> String

Input json_input: WasmRobustnessInput

Field	Type	Required	Description
class	string	yes
column_storey_reaction_kn	number		Default: 0.
construction	string		Default: "".
gk_kpa	number		Default: 0.
psi	number		Default: 1.
qk_kpa	number		Default: 0.
storeys	integer		Default: 1.
tie_spacing_m	number		Default: 0.
tie_span_m	number		Default: 0.
wall_clear_height_m	number		Default: 0.
wall_plan_area_mm2	number		Default: 0.
wall_thickness_m	number		Default: 0.
z_m	number		Default: 0.

Result: RobustnessResult

Result fields

Field	Type	Required	Description
class	ConsequencesClass	yes
class_examples	string	yes
class_label	string	yes
construction	Construction	yes
f_t	number | null		A6.2: F_t (kN/m or kN), None for framed construction.
horizontal_ties_required	boolean	yes	Whether the strategy asks for horizontal ties at all (Class 2 and above).
key_element_ad_kpa	number	yes	A9: the key-element accidental design action A_d (kN/m2), horizontal and vertical, one at a time.
notional_removal_damage_limit	number	yes	A5(c): the admissible local damage on notional removal, 15 percent of the floor in each of two adjacent storeys.
standard	string	yes
steps	Step[]	yes
strategy	string	yes
t_internal	number	yes	A6.1 framed: internal tie force T_i (kN) and perimeter tie force T_p (kN); A6.2 wall: internal T_i (kN/m of floor width) and peripheral T_p (kN).
t_perimeter	number	yes
t_vertical	number | null		A7: framed, the accidental design tensile force on the column (kN); wall, the vertical tie force (N per the formula, reported in kN/m of wall).
t_vertical_units	string	yes
tie_units	string	yes	The unit the horizontal tie forces are in: "kN" (framed) or "kN/m, kN" (wall internal, peripheral).
verified	boolean	yes
vertical_ties_required	boolean	yes	Whether the strategy asks for vertical ties or the notional-removal alternative (Class 2b).
warnings	string[]	yes

en1991_1_7_tables

Every constant en1991_1_7.rs carries, for the ledger check.

en1991_1_7_tables() -> String

Result: untyped (no typed serialisation found)

en1991_3_crane

EN 1991-3 crane actions: wheel loads, horizontal forces and dynamic factors.

en1991_3_crane(json_input: &str) -> String

Input json_input: WasmCraneInput

Field	Type	Required	Description
bridge_weight_kn	number	yes
buffer_stiffness_kn_m	number		Default: 0.
buffer_xi	number		Default: 0.5.
crab_weight_kn	number		Default: 0.
driven_wheels	integer		Default: 2.
fatigue_class	integer | null		Default: null.
friction	number		Default: 0.2.
guide_spacing_m	number		Default: 0.
hoist_load_kn	number	yes
hoisting_class	integer		Default: 2.
hoisting_speed_ms	number		Default: 0.1.
min_approach_m	number		Default: 1.
phi_5	number		Default: 1.5.
skew_angle_rad	number		Default: 0.015.
span_m	number	yes
travel_speed_ms	number		Default: 0.
wheel_pair_distances_m	number[]		Default: [].
wheel_spacings_m	number[]		Default: [3].
wheels_per_rail	integer		Default: 2.

Result: CraneResult

Result fields

Field	Type	Required	Description
axle_spacings_m	number[]	yes
axle_weights_kn	number[]	yes	The axle train for the runway beam: the group 1 wheel loads on rail 1 at the wheel spacings.
buffer_h_b1_kn	number	yes	Buffer forces (kN): H_B,1 from the crane's kinetic energy, H_B,2 from the crab.
buffer_h_b2_kn	number	yes
drive_force_kn	number	yes	Drive force K (kN), the lever l_s (m), the moment M (kNm).
drive_moment_knm	number	yes
fatigue_q_e_normal_kn	number | null		Fatigue damage-equivalent wheel loads (kN per wheel), normal and shear, if a class was given.
fatigue_q_e_shear_kn	number | null
groups	LoadGroup[]	yes
l_s_m	number	yes
phi_1	number[]	yes
phi_2	number	yes
phi_4	number	yes
phi_5	number	yes
phi_7	number	yes
q_r_max_acc_static	number	yes
q_r_max_kn	number	yes	The characteristic maximum wheel load (group 1, phi_1 = 1.1 and phi_2), kN per wheel.
q_r_max_static	number	yes	Static wheel loads (no dynamic factor), kN per wheel: loaded crane near rail (Q_r,max), loaded far rail (Q_r,(max)), unloaded near rail (Q_r,min), unloaded far rail (Q_r,(min)).
q_r_min_acc_static	number	yes
q_r_min_kn	number	yes	The characteristic minimum wheel load (unloaded crane, phi_1 = 0.9), kN per wheel.
q_r_min_static	number	yes
skew_f	number	yes	Skewing: f, S (kN), and the transverse wheel forces per wheel pair on rails 1 and 2 (kN).
skew_h_t_rail1_kn	number[]	yes
skew_h_t_rail2_kn	number[]	yes
skew_s_kn	number	yes
standard	string	yes
steps	Step[]	yes
verified	boolean	yes
warnings	string[]	yes
xi_1	number	yes

en1991_3_tables

Every constant crane_en1991_3.rs carries, for the ledger check.

en1991_3_tables() -> String

Result: untyped (no typed serialisation found)

generate_load_combinations

Generates the AS/NZS 1170.0 load combinations for the load cases and occupancy given.

generate_load_combinations(json_input: &str) -> String

Input json_input: WasmComboGenInput

Field	Type	Required	Description
code	string		Which code's combination set: "asnzs" (default) | "asce7" | "eurocode". Default: "".
load_cases	WasmLoadCase[]	yes
occupancy	string | null		AS/NZS 1170.0 Table 4.1 occupancy: resolves psi_s/psi_l/psi_c/psi_e at once. Overridden per-field by any of the explicit psi_* fields above. Default: null.
psi0_q	number | null		Default: null.
psi0_s	number | null		Default: null.
psi0_w	number | null		Default: null.
psi1_q	number | null		Default: null.
psi2_q	number | null		Default: null.
psi_c	number | null		Default: null.
psi_e	number | null		AS/NZS 1170.0 Table 4.1 earthquake combination factor. Default: null.
psi_l	number | null		Default: null.
psi_s	number | null		Default: null.

Result: WasmComboGenOutput

Result fields

Field	Type	Required	Description
combinations	WasmLoadCombination[]	yes

nzs1170_design_coefficient

NZS 1170.5:2004 Eq 5.2(1)/(2): Cd(T1) = C(T1) Sp / k_mu, floored.

nzs1170_design_coefficient(json_input: &str) -> String

Input json_input: WasmNzDesignCoefficientInput

Field	Type	Required	Description
annual_probability	number	yes
mu	number	yes	Structural ductility factor mu, Cl 4.3.
n_max	number | null		Default: null.
near_fault_km	number | null		Default: null.
period	number	yes	T1, the largest translational period in the direction considered (Cl 4.1).
soil	string	yes
sp	number	yes	Structural performance factor Sp, Cl 4.4.
z	number	yes

Result: WasmNzDesignCoefficientResult

Result fields

Field	Type	Required	Description
c_t	number	yes
cd	number	yes
cd_unfloored	number	yes
clause	string	yes
floor	number	yes
floor_governs	boolean	yes	True when Eq 5.2(2)'s floor decided the answer.
k_mu	number	yes
r	number	yes
r_capped	boolean	yes
sp	number	yes

nzs1170_design_spectrum

NZS 1170.5 design spectrum for a site.

nzs1170_design_spectrum(json_input: &str) -> String

Input json_input: WasmNzDesignSpectrumInput

Field	Type	Required	Description
annual_probability	number	yes
mu	number	yes	Structural ductility factor mu, Cl 4.3.
n_max	number | null		Default: null.
near_fault_km	number | null		Default: null.
soil	string	yes
sp	number	yes	Structural performance factor Sp, Cl 4.4.
z	number	yes

Result: WasmNzDesignSpectrumResult

Result fields

Field	Type	Required	Description
citation	string	yes	The same sentence the UI prints beside the numbers, so the reading travels with them.
clause	string	yes
floored	boolean	yes	True when the floor decided at least one ordinate, for a one-line caveat.
floored_periods	number[]	yes	The periods where Eq 5.2(2)'s floor decided the ordinate rather than Eq 5.2(1).
mu	number	yes
points	[number, number][]	yes	(period s, Cd) pairs, one per Table 3.1 period, ascending.
r	number	yes
r_capped	boolean	yes
sp	number	yes
z	number	yes

nzs1170_equivalent_static

NZS 1170.5:2004 Eq 6.2(1) and 6.2(2): V = Cd(T1) Wt, then Fi = Ft + 0.92 V Wi hi / SUM(Wi hi).

nzs1170_equivalent_static(json_input: &str) -> String

Input json_input: WasmNzEquivalentStaticInput

Field	Type	Required	Description
annual_probability	number	yes
levels	[number, number][]	yes	(seismic weight N, height above base m) per level, in any order.
mu	number	yes
n_max	number | null		Default: null.
near_fault_km	number | null		Default: null.
period	number	yes
soil	string	yes
sp	number	yes
weight	number | null		Seismic weight Wt, newtons (Cl 4.2). Omit to have it summed from levels. Default: null.
z	number	yes

Result: WasmNzEquivalentStaticResult

Result fields

Field	Type	Required	Description
base_shear	number	yes
cd	number	yes
cd_unfloored	number	yes
clause	string	yes
floor_governs	boolean	yes
k_mu	number	yes
levels	WasmNzStoreyForce[]	yes
seismic_weight	number	yes

nzs1170_part_force

NZS 1170.5:2004 Eq 8.2(1) and 8.5(1): the horizontal design action on a part.

nzs1170_part_force(json_input: &str) -> String

Input json_input: WasmNzPartInput

Field	Type	Required	Description
annual_probability	number	yes
cph	number	yes	Part horizontal response factor C_ph, Table 8.2.
hi	number	yes	Height of the part's attachment above the base, m. Below ground floor reads as ground floor.
hn	number	yes	Height from the base to the uppermost seismic mass, m.
n_max	number | null		Default: null.
near_fault_km	number | null		Default: null.
rp	number	yes	Part risk factor R_p, Table 8.1.
soil	string	yes
tp	number	yes	Period of the part itself, seconds (Cl 8.4).
wp	number	yes	Weight of the part, newtons.
z	number	yes

Result: WasmNzPartResult

Result fields

Field	Type	Required	Description
c_hi	number	yes
c_i	number	yes
c_zero	number	yes	C(0), from Table 3.1's BRACKETED column - not the general spectrum at zero period.
capped	boolean	yes	True when 3.6 W_p decided the answer.
clause	string	yes
cp	number	yes
force	number	yes	F_ph, newtons, after Eq 8.5(1)'s 3.6 W_p cap.
unbounded	number	yes

nzs1170_site_hazard

NZS 1170.5:2004 Eq 3.1(1): C(T) = Ch(T) Z R N(T,D).

nzs1170_site_hazard(json_input: &str) -> String

Input json_input: WasmNzSiteHazardInput

Field	Type	Required	Description
annual_probability	number	yes	Annual probability of exceedance, as a fraction: 1/500 is 0.002 (Table 3.5).
n_max	number | null		Nmax(T) from Table 3.7, which this build does not carry. Default: null.
near_fault_km	number | null		Shortest distance to a Table 3.6 fault, km. With n_max, drives Cl 3.1.6. Default: null.
period	number	yes	Period T, seconds. Table 3.1 stops at 4.5 s and so does this.
soil	string	yes	Site subsoil class A, B, C, D or E (Cl 3.1.3). A and B are one column of Table 3.1.
z	number	yes	Hazard factor Z (Cl 3.1.4, Table 3.3).

Result: WasmNzSiteHazardResult

Result fields

Field	Type	Required	Description
c_t	number	yes
ch_t	number	yes
clause	string	yes
n_t_d	number	yes
r	number	yes
r_capped	boolean	yes	True when Cl 3.1.1's cap held Z R down to 0.7.
r_table	number	yes
z	number	yes

p354_floor_vibration

Floor vibration response to walking (SCI P354) from the modal result.

p354_floor_vibration(json_input: &str) -> String

Input json_input: WasmFloorVibrationInput

Field	Type	Required	Description
cutoff_hz	number | null		Default: null.
damping	string		Default: "".
damping_ratio	number | null		Default: null.
floor	string		Default: "".
limit	number		Default: 8.
modes	FloorMode[]	yes
pace_max_hz	number		Default: 2.2.
pace_min_hz	number		Default: 1.8.
person_weight_n	number		Default: 746.
vertical	boolean		Default: true.
walking_path_m	number | null		Default: null.
weighting	string		Default: "".

Result: FloorVibrationResult

Result fields

Field	Type	Required	Description
base_value	number	yes
cutoff_hz	number	yes
damping_ratio	number	yes
floor_class	string	yes	"low" or "high", by Table 6.1.
fundamental_hz	number	yes
governing	string	yes
governing_pace_hz	number	yes
limit	number	yes
ok	boolean	yes
response_factor	number	yes	The governing response factor (the larger of steady-state and transient) and where it came from.
standard	string	yes
steady_state	SteadyStateResult | null
steps	Step[]	yes
transient	TransientResult	yes
verified	boolean	yes
warnings	string[]	yes
weighting	Weighting	yes

p354_tables

Every constant floor_vibration.rs carries, for the ledger check.

p354_tables() -> String

Result: untyped (no typed serialisation found)

Timber

as1720_timber_check

AS 1720.1 timber member check (mm, N and N.mm; see docs/adr/0014).

as1720_timber_check(json_input: &str) -> String

Input json_input: WasmAs1720Input

Field	Type	Required	Description
a_t	number | null		Net tension area (mm²) when holes reduce it; defaults to the gross area. Default: null.
b	number		Breadth of ONE board (mm). Stability uses it; area and Z use n_boards · b. Default: 0.
category	integer		Application category 1, 2 or 3 (Table 2.1). Default: 2.
d	number		Default: 0.
g13x	number		Effective length factors g13 about x (major) and y (minor), Table 3.2. Default: 1.
g13y	number		Default: 1.
grade	string		Default: "F17".
high_temp	boolean		Seasoned timber in Queensland north of 25°S or elsewhere north of 16°S: k6 = 0.9. Default: false.
k1	number		Default: 1.
k12	number | null		Default: null.
k12c	number | null		Default: null.
k4	number | null		Default: null.
k6	number | null		Default: null.
k9	number | null		Default: null.
la_phi	number | null		Spacing of torsional restraints (only for TensionAndTorsional). Default: null.
la_y	number | null		Spacing of restraints against lateral (minor-axis) displacement, for S1 and S4. Defaults to length. Default: null.
le_bending	number		Default: 0.
le_compression	number		Default: 0.
length	number | null		Member length L (mm): the span for k9 and the length for column buckling. Default: null.
m_star	number		Default: 0.
n_boards	integer		Boards nailed or screwed side by side (a "2/190x35" is 2). Default: 1.
n_members	integer		Members in the parallel system for k9 (1 = single member) and their spacing (mm). Default: 1.
n_star	number		Default: 0.
nt_star	number		Default: 0.
partial_seasoning	boolean		Unseasoned timber that will partly season in service: k4 by least dimension (Table 2.5). Default: false.
r	number		Ratio of temporary to total design action effect (Appendix E2); ≤ 0 is taken as 0.25. Default: 0.25.
restraint_edge	RestraintEdge		Default: "compression".
seasoned	boolean		Default: true.
spacing	number		Default: 0.
species	Species		Default: "softwood".
v_star	number		Default: 0.

Result: WasmAs1720Result

Result fields

Field	Type	Required	Description
E	number	yes
S1	number	yes
S3	number	yes
S4	number	yes
continuousRestraint	boolean	yes
fB	number	yes
fC	number	yes
fS	number	yes
fT	number	yes
governing	string	yes
k1	number	yes
k12	number	yes
k12c	number	yes
k12x	number	yes
k12y	number	yes
k4	number	yes
k6	number	yes
k9	number	yes
phi	number	yes
phiM	number	yes
phiN	number	yes	Compression capacity, the smaller of the two axes.
phiNcx	number	yes
phiNcy	number	yes
phiNt	number	yes
phiV	number	yes
rhoB	number	yes
rhoC	number	yes
stabilityAssessed	boolean	yes
utilM	number	yes
utilMax	number	yes
utilN	number	yes
utilNt	number	yes
utilV	number	yes