feat(core,view): footing rebar B1–B12 (plan C5) and the ③ rebar screen v1
- Footing (확대기초철근 (1).md): grid counts from W and L, layer heights, B1–B4 and B5–B8 counts and lengths (B2 13646, B6 11396), B10-1/B10-2, B11 (60) and B12 (47) with their lengths. B9 is not computed yet. - rebarSummary: one 철근표 per pier from the model (bearing, coping, column, footing), with alerts: RB-F08 (B2 needs a splice, Q-B6), RB-F09 (B9 not computed). - ③ screen v1: stage nav button, member tabs (받침블럭 · 코핑 · 기둥 · 확대기초), rebar table with 번호 · 규격 · 개수 · 길이 · 비고, alert list, and the open questions (Q-B5, Q-B6, Q-C9). Drawings and the 강조 연동 are not in v1. - Tests: footing values from the document; P1 summary totals; warnings. - Not verified in a browser. Co-Authored-By: Claude Haiku 5.5 <noreply@anthropic.com>
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import { hookLength, NOMINAL_DIAMETER, type BarSize } from './common';
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/**
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* 확대기초 철근 B1–B8, B10–B12 (plan C5). Source: RAG/확대기초철근 (1).md, 2026-10-22 최종 정리.
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* B9 (전단철근) is not computed yet. Lengths in mm, heights in mm from the 확대기초 하면.
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*/
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export const FOOTING_DEFAULTS = {
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/** 피복 상면 / 측면 / 하면 (최외측 철근 중심까지). */
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cTop: 100,
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cSide: 100,
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cBottom: 150,
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/** 첫 철근 최소 여유. */
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eMin: 150,
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/** 격자 실간격 s. */
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s: 125,
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/** 하면 1단과 2단의 간격 Δ_2. */
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delta2: 100,
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/** B10 높이 간격 s_v and 조립 단 배수 n. */
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sV: 200,
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n: 2,
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/** B1·B3 leg and B5·B7 leg (proposed values; Q-B5 open). */
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legB1: 300,
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legB3: 230,
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legB5: 343,
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legB7: 230,
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} as const;
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export interface GridResult {
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/** 격자 칸 수 n = floor((A − 2·e_min)/s); 위치 수 = n + 1. */
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n: number;
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/** 격자 길이 G = n·s. */
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G: number;
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/** 양끝 여유 e = (A − G)/2. */
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e: number;
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/** 위치 수 n + 1. */
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positions: number;
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}
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/** Grid along one side of the footing (§3.1). side = W for B1–B4, L for B5–B8. */
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export function grid(side: number, s = FOOTING_DEFAULTS.s, cSide = FOOTING_DEFAULTS.cSide, eMin = FOOTING_DEFAULTS.eMin): GridResult {
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const A = side - 2 * cSide;
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const n = Math.floor((A - 2 * eMin) / s);
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const G = n * s;
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const e = (A - G) / 2;
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return { n, G, e, positions: n + 1 };
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}
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const d = (size: BarSize) => NOMINAL_DIAMETER[size];
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/** Layer heights (§4.2), mm from the 하면. H = footing height. */
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export interface Layers {
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B5: number;
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B1: number;
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B24: number;
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B68: number;
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B3: number;
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B7: number;
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}
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export function layers(H: number): Layers {
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const { cTop, cBottom, delta2 } = FOOTING_DEFAULTS;
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const zB5 = H - cTop;
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const zB1 = zB5 - (d('S29') + d('S25')) / 2;
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const zB24 = cBottom;
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const zB68 = cBottom + (d('S25') + d('S29')) / 2;
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return { B5: zB5, B1: zB1, B24: zB24, B68: zB68, B3: zB24 + delta2, B7: zB68 + delta2 };
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}
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/** Lengths of the B1–B4 family along the length L (§5.2). */
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export function legB2(H: number): number {
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const z = layers(H);
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return z.B1 - z.B24; // 1723 at H 2000
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}
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export interface FootingBar {
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name: 'B1' | 'B2' | 'B3' | 'B4' | 'B5' | 'B6' | 'B7' | 'B8' | 'B10-1' | 'B10-2' | 'B11' | 'B12';
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size: BarSize;
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/** Bars in all (over the footing). */
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count: number;
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/** Length of one bar, mm (straight part + legs). */
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length: number;
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}
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/** B1–B4 (§5): the grid along W, with lengths from L. */
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export function bottomBars(L: number, W: number, H: number): FootingBar[] {
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const g = grid(W);
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const n = g.positions;
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const N4 = Math.ceil(n / 2); // B4 at even i
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const N2 = Math.floor(n / 2); // B2 at odd i
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const l0 = L - 2 * FOOTING_DEFAULTS.cSide;
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const leg2 = legB2(H);
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return [
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{ name: 'B1', size: 'S25', count: N2, length: l0 + 2 * FOOTING_DEFAULTS.legB1 },
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{ name: 'B2', size: 'S25', count: N2, length: l0 + 2 * leg2 },
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{ name: 'B3', size: 'S19', count: N2, length: l0 + 2 * FOOTING_DEFAULTS.legB3 },
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{ name: 'B4', size: 'S25', count: N4, length: l0 },
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];
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}
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/** B5–B8 (§6): the grid along L, with lengths from W. */
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export function crossBars(L: number, W: number, H: number): FootingBar[] {
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const g = grid(L);
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const n = g.positions;
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const N8 = Math.ceil(n / 2); // B8 at even i
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const N6 = Math.floor(n / 2); // B6, B5, B7 at odd i
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const l0 = W - 2 * FOOTING_DEFAULTS.cSide;
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const z = layers(H);
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const leg6 = z.B5 - z.B68;
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return [
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{ name: 'B5', size: 'S29', count: N6, length: l0 + 2 * FOOTING_DEFAULTS.legB5 },
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{ name: 'B6', size: 'S29', count: N6, length: l0 + 2 * leg6 },
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{ name: 'B7', size: 'S19', count: N6, length: l0 + 2 * FOOTING_DEFAULTS.legB7 },
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{ name: 'B8', size: 'S29', count: N8, length: l0 },
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];
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}
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/** B10-1 (on W sides) and B10-2 (on L sides): m + 1 levels at s_v, two faces each (§7). */
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export function sideBars(L: number, W: number): FootingBar[] {
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const depth1 = 123.85; // B10-1 depth from the side
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const depth2 = 122.25; // B10-2 depth from the side
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const levels = 9; // 8 @ 200 (기본)
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const hook = hookLength('main90', d('S19'));
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return [
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{ name: 'B10-1', size: 'S19', count: levels * 2, length: L - 2 * depth2 + 2 * hook },
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{ name: 'B10-2', size: 'S19', count: levels * 2, length: W - 2 * depth1 + 2 * hookLength('main90', d('S19')) },
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];
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}
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/** B11 (along W, between the B10-2 levels) and B12 (along L), 4s apart with a 2s stagger per level (§8). */
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export function assemblyBars(L: number, W: number): FootingBar[] {
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const levelsJ = [2, 4, 6]; // j = n, 2n, 3n … inside the B10 levels (n = 2)
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const perLevel = (n: number, startOdd: number, startEven: number) =>
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levelsJ.map((_, idx) => {
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const i0 = idx % 2 === 0 ? startOdd : startEven;
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return Math.floor((n - i0) / 4) + 1;
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});
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const nW = grid(W).positions - 1; // 61
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const nL = grid(L).positions - 1; // 79
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// B11 is spread along L (n = 79) and B12 along W (n = 61); each level has its own count.
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const b11 = perLevel(nL, 0, 2).reduce((a, b) => a + b, 0);
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const b12 = perLevel(nW, 0, 2).reduce((a, b) => a + b, 0);
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const hook = hookLength('main90', d('S16'));
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return [
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{ name: 'B11', size: 'S16', count: b11, length: W - 2 * 141.35 + 2 * hook },
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{ name: 'B12', size: 'S16', count: b12, length: L - 2 * 139.75 + 2 * hook },
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];
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}
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