import type { WeldStrengthInput, WeldStrengthResult } from './types.js';
/**
 * Calculate the load-carrying capacity of an equal-leg fillet weld (AISC ASD).
 *
 * # Formulas
 * - Effective throat:      t = 0.707 x leg
 * - Effective area:        Aw = t x L x n
 * - Allowable shear stress: Fw = 0.30 x FEXX
 * - Allowable load (capacity): Pallow = Fw x Aw
 * - Actual shear stress:    tau = P / Aw
 * - Utilization:            u = tau / Fw = P / Pallow
 * - Minimum required leg:   leg_min = P / (Fw x 0.707 x L x n)
 *
 * Units are SI throughout: leg/length in mm give Aw in mm^2; Fw in MPa (= N/mm^2)
 * gives Pallow directly in N. Cross-check: E70 -> Fw = 0.30 x 70 = 21 ksi, the
 * classic AISC worked-example value (= 0.30 x 483 MPa = 144.9 MPa).
 *
 * # v1 scope (deliberately conservative — matches the common baseline calculators)
 * These are recorded here so the boundary is explicit, not accidental:
 * 1. **ASD only.** Allowable-stress design (0.30 x FEXX). LRFD (phi = 0.75,
 *    Fnw = 0.60 x FEXX) is deferred until demanded via a `method` parameter.
 * 2. **Longitudinal / conservative.** No directional strength increase. AISC allows
 *    up to 1.5x for transverse loading (Fw = 0.60 x FEXX x (1 + 0.5 sin^1.5 theta));
 *    omitting it is conservative and matches most basic calculators.
 * 3. **Weld metal only.** Base-metal (shear rupture) checks are the engineer's
 *    responsibility; a full design also verifies the connected material.
 * 4. **Equal-leg, 90-degree joint.** t = 0.707 x leg assumes an equal-leg fillet on a
 *    square (90-degree) joint. Unequal-leg / non-90-degree joints are deferred.
 *
 * Reference: AISC 360 (Steel Construction Manual), AWS D1.1 Structural Welding Code.
 *
 * @throws {RangeError} legSize or weldLength is not positive, weldCount < 1, or
 *   appliedLoad is negative
 */
export declare function weldStrength(input: WeldStrengthInput): WeldStrengthResult;
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