import type { RebarSize, RebarInput, RebarResult } from './types.js';
/**
 * Get the unit weight of a rebar size
 *
 * @param size - Rebar size designation (D10, D13, etc.)
 * @returns Unit weight in kg/m
 */
export declare function getRebarUnitWeight(size: RebarSize): number;
/**
 * Calculate total rebar weight
 *
 * @param input - Rebar size, length, and quantity
 * @returns Rebar weight calculation results
 * @throws {RangeError} size is not a known rebar designation (D10–D32)
 */
export declare function rebarWeight(input: RebarInput): RebarResult;
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