/**
 * One coherent deck post-and-rail guard laid out along a rail path, as oriented
 * boxes — the AWC Deck Construction Guide (DCA 6) guard in metres: a 4x4 post
 * at each end (and every bay ≤ 4 ft between), a flat 2x6 cap over them with a
 * 2x4 top rail on edge under it, a 2x4 bottom rail held off the nosing line,
 * and 1½ in square pickets between the rails at a gap under the 4 in sphere
 * (IRC R312.1.3). It shares the path sampling, corner finding and newel/picket
 * stations in `guard-path.ts` with the baluster guard, 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 and
 * joinery differ from the balusters. Pure data — no Three.js, no React.
 *
 * `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 cap with a small cap of their own.
 */
import { type GuardBox, type GuardRail, type Vec3 } from './guard-path.js';
export type PostAndRailGuardOptions = {
    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 deck guard's rails, bottom-to-top: a 2x4 bottom rail, a 2x4 top rail on
 * edge under the cap, and the flat 2x6 cap. Shared with the flight connector. */
export declare function postAndRailGuardRails(railHeight: number): GuardRail[];
export declare function buildPostAndRailGuard(points: Vec3[], options: PostAndRailGuardOptions): GuardBox[];
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