/**
 * One coherent metal guard laid out along a rail path, as oriented boxes — a
 * fabricated steel guardrail in metres: a slim square post at each end (and
 * every bay ≤ 4 ft between), welded to a flat baseplate that mounts it to the
 * tread rather than embedding below it, a flat top rail and a bottom rail that
 * follow the path with a fitting block closing every interior corner, and
 * slender square balusters spanning the two rails. It shares the path sampling,
 * corner finding and newel/picket stations in `guard-path.ts` with the baluster,
 * deck post-and-rail, cable, boards and glass guards, so a straight flight, a
 * chained L/U landing turn, a winder, a curved or spiral sweep and an integrated
 * top landing all read as the same guard; only the sections, the surface-mounted
 * feet and the slim infill differ. Pure data — no Three.js, no React.
 *
 * Unlike the wood guards, a steel post is not sunk into the structure: it stands
 * on the nosing line on a baseplate, the mounting foot that grounds it. The
 * infill is plumb slender bars spanning rail to rail, so nothing crosses the
 * walking volume on a slope and every member meets another.
 *
 * `reach` runs the rails that far past the top vertex along the final slope to
 * die into a post standing there; `topPost: false` then omits the top post.
 * `postThrough` runs the posts past the top rail with a small cap of their own.
 */
import { type GuardBox, type GuardRail, type Vec3 } from './guard-path.js';
export type MetalGuardOptions = {
    railHeight: number;
    /** Metres between posts along the run; omit (or Infinity) for ends only. */
    postSpacing?: number;
    topPost?: boolean;
    postThrough?: boolean;
    /** Metres the rails run past the top vertex, along the final slope. */
    reach?: number;
};
/** The metal guard's two rails, bottom-to-top: a slim bottom rail held off the
 * nosing line and a flat top rail with its top at the guard height. Shared with
 * the flight connector so a bridge carries the same rails as the guards it joins. */
export declare function metalGuardRails(railHeight: number): GuardRail[];
export declare function buildMetalGuard(points: Vec3[], options: MetalGuardOptions): GuardBox[];
//# sourceMappingURL=metal-guard.d.ts.map