diff --git a/src/core/abut/bearing-table.ts b/src/core/abut/bearing-table.ts
index 29215bc..22d42b2 100644
--- a/src/core/abut/bearing-table.ts
+++ b/src/core/abut/bearing-table.ts
@@ -51,6 +51,8 @@ export function resolveBearingRule(changes?: Partial<AbutBearingRule> & Record<s
 export interface AbutSoleContext {
   pairs?: BearingPair[];
   slopeI?: number;
+  /** 엑셀 방위각 per bearing number (deg model 진북), when an applied 계산 방위각 is in the model. */
+  inputAzimuthDeg?: Record<string, number>;
 }
 
 /** Solplate of every bearing of the abutment (one row). */
@@ -58,7 +60,7 @@ export function abutSoles(model: AbutModel, rule: AbutBearingRule, heightMm: num
   const plates = Object.fromEntries(model.bearings.map((b) => [String(b.no), { aMm: rule.aMm, bMm: rule.bMm }]));
   return structureSoles(
     model.name,
-    model.bearings.map((b) => ({ no: b.no, row: '1열', azimuthDeg: b.azimuthDeg ?? 0 })),
+    model.bearings.map((b) => ({ no: b.no, row: '1열', azimuthDeg: b.azimuthDeg ?? 0, inputAzimuthDeg: ctx.inputAzimuthDeg?.[String(b.no)] })),
     {
       h3Mm: rule.h3Mm ?? heightMm - rule.tRefMm, tRefMm: rule.tRefMm, tMinMm: rule.tMinMm, marginMm: rule.marginMm, plates,
       tByRow: rule.tMm === undefined ? undefined : { '1열': rule.tMm },
@@ -132,6 +134,9 @@ export interface AbutSolplateRow {
   /** 방위각 검사 (″): input azimuth against the pair direction; absent without a pair. */
   azimuthSec?: number;
   pairKind?: 'girder' | 'chord';
+  /** 방위각 입력 (엑셀) and 계산 (짝 받침), deg model 진북; 계산 absent without a pair. */
+  azimuthInputDeg: number;
+  azimuthCalcDeg?: number;
   L: number;
   W: number;
   T: number;
@@ -146,7 +151,7 @@ export function abutSolplateRows(model: AbutModel, rule: AbutBearingRule, height
   return abutSoles(model, rule, heightMm, ctx).map((p) => {
     const rhs = (p.L * Math.abs(p.slopePct)) / 100;
     return {
-      no: p.no, S: p.slopePct, source: p.slopeSource, azimuthSec: p.azimuthCheckSec,
+      no: p.no, S: p.slopePct, source: p.slopeSource, azimuthSec: p.azimuthCheckSec, azimuthInputDeg: p.azimuthInputDeg, azimuthCalcDeg: p.azimuthCalcDeg,
       pair: p.pair ? `${p.pair.structure}-${CIRCLED[p.pair.no - 1] ?? p.pair.no}${p.pairKind === 'chord' ? ' (현)' : ''}` : undefined, pairKind: p.pairKind,
       L: p.L, W: p.W, T: p.T, T1: p.T1, T2: p.T2,
       check: `${p.T1 - p.T2} ≈ ${rhs.toFixed(1)} ${Math.abs(p.T1 - p.T2 - rhs) <= 1 + 1e-9 ? '일치' : '불일치 (W08)'}`,
diff --git a/src/core/abut/parse.ts b/src/core/abut/parse.ts
index 0534dde..bdee227 100644
--- a/src/core/abut/parse.ts
+++ b/src/core/abut/parse.ts
@@ -66,6 +66,8 @@ export interface AbutRecord {
   shape?: Partial<AbutShape>;
   /** 받침 규칙 (② 교량받침 카드: h3, 솔플레이트 T·여유, 받침 종류). Only the changed values. Absent = 교각 P1 가정값 (QA-15). */
   bearingRule?: Partial<AbutBearingRule>;
+  /** 계산 방위각을 적용한 받침: 받침번호 → 방위각 (deg, model 진북). Absent = 엑셀 입력값 (2026-11-06). */
+  azimuthApplied?: Record<string, number>;
   /** 날개벽 치수 (② 날개벽 카드, 측별, mm). Only the changed values. */
   wingDims?: { left?: Partial<WingDims>; right?: Partial<WingDims> };
   /** 접속슬래브 입력 (② 접속슬래브 카드: 형식, 경사, 치수 mm). Only the changed values. Absent = 매립형 · 하향 4 % 기본값. */
@@ -235,7 +237,8 @@ export function toAbutInput(rec: AbutRecord): AbutInput {
     ip1: rec.ip1,
     ip2: rec.ip2,
     ip3: rec.ip3,
-    bearings: rec.bearings.map((b) => ({ no: b.no, pos: b.pos, z: b.z, seatEl: b.seatEl, azimuthDeg: b.azimuthDeg })),
+    // 계산 방위각을 적용한 받침 (2026-11-06) use that value; the record keeps the workbook value.
+    bearings: rec.bearings.map((b) => ({ no: b.no, pos: b.pos, z: b.z, seatEl: b.seatEl, azimuthDeg: rec.azimuthApplied?.[String(b.no)] ?? b.azimuthDeg })),
     skewDeg: rec.skewDeg,
     slopeI: rec.slopeI,
     wings: rec.wings,
diff --git a/src/core/bearing-pair.ts b/src/core/bearing-pair.ts
index 92a6290..8cb27c7 100644
--- a/src/core/bearing-pair.ts
+++ b/src/core/bearing-pair.ts
@@ -45,6 +45,9 @@ export interface BearingPair {
   slopePct: number;
   /** The structure on the higher end: the 오르막 쪽 where T1 sits for both bearings. */
   uphill: string;
+  /** 계산 방위각 (deg, model 진북) of each end from the pair: the girder direction, or on a 현 the arc tangent. */
+  fromCalcDeg: number;
+  toCalcDeg: number;
   /** girder = the two ends of one girder; chord = A1 ↔ A2 of a bridge loaded without piers (현, chordPairs). */
   kind: 'girder' | 'chord';
   warnings: PairWarning[];
@@ -52,6 +55,8 @@ export interface BearingPair {
 
 const DEG = Math.PI / 180;
 const angleDiffDeg = (a: number, b: number) => Math.abs(((a - b + 540) % 360) - 180);
+/** a − b wrapped to (−180, 180]. */
+const signedDiff = (a: number, b: number) => ((a - b + 540) % 360) - 180;
 
 /**
  * Girder pairs over the bridge (Q-SH1, Q-SH4). For each bearing b the candidates on the other structures lie
@@ -89,7 +94,7 @@ export function girderPairs(structures: PairStructure[]): BearingPair[] {
       pairs.push({
         from: { structure: here.name, no: b.no }, to: { structure: best.c.structure, no: best.c.no },
         distanceM, offsetM: best.offset, azimuthDiffDeg: best.dAz, directionDeg, fromCheckSec, toCheckSec,
-        slopePct, uphill: best.c.z > b.z ? best.c.structure : here.name, warnings, kind: 'girder',
+        slopePct, uphill: best.c.z > b.z ? best.c.structure : here.name, warnings, kind: 'girder', fromCalcDeg: directionDeg, toCalcDeg: directionDeg,
       });
     }
   }
@@ -119,6 +124,9 @@ export function chordPairs(starts: PairStructure[], ends: PairStructure[]): Bear
       distanceM, offsetM: 0, azimuthDiffDeg: angleDiffDeg(best.c.azimuthDeg, b.azimuthDeg), directionDeg: best.directionDeg,
       fromCheckSec: best.dev * 3600, toCheckSec: best.dev * 3600, slopePct: ((best.c.z - b.z) / distanceM) * 100,
       uphill: best.c.z > b.z ? best.structure : here.name, warnings: candidates.length > 1 ? ['WS04'] : [], kind: 'chord',
+      // Circular arc: the tangent at each end is the chord turned by half the azimuth change.
+      fromCalcDeg: (best.directionDeg + signedDiff(b.azimuthDeg, best.c.azimuthDeg) / 2 + 360) % 360,
+      toCalcDeg: (best.directionDeg + signedDiff(best.c.azimuthDeg, b.azimuthDeg) / 2 + 360) % 360,
     });
   }
   return pairs;
diff --git a/src/core/bearing-table.ts b/src/core/bearing-table.ts
index f5b99f0..6700baf 100644
--- a/src/core/bearing-table.ts
+++ b/src/core/bearing-table.ts
@@ -64,6 +64,9 @@ export interface SolplateRow {
   /** 방위각 검사 (″): input azimuth against the pair direction; absent without a pair. */
   azimuthSec?: number;
   pairKind?: 'girder' | 'chord';
+  /** 방위각 입력 (엑셀) and 계산 (짝 받침), deg model 진북; 계산 absent without a pair. */
+  azimuthInputDeg: number;
+  azimuthCalcDeg?: number;
   /** Where S comes from: 계산 (짝) / 입력 (종단경사) / 가정 (다른 열) / 수정됨 / 없음. */
   source: SlopeSource;
   /** T typed by the user (수정됨) rather than automatic. */
@@ -133,7 +136,7 @@ export function solplateRows(m: PierModel): SolplateRow[] {
       const checkRhs = (p.L * Math.abs(p.slopePct)) / 100;
       return {
         pair: s.pair ? `${s.pair.structure}-${CIRCLED_NO[s.pair.no - 1] ?? s.pair.no}${s.pairKind === 'chord' ? ' (현)' : ''}` : undefined, pairKind: s.pairKind,
-        azimuthSec: s.azimuthCheckSec, source: s.slopeSource, tTyped: s.tTyped, A: s.aMm, B: s.bMm, warnings: s.warnings,
+        azimuthSec: s.azimuthCheckSec, azimuthInputDeg: s.azimuthInputDeg, azimuthCalcDeg: s.azimuthCalcDeg, source: s.slopeSource, tTyped: s.tTyped, A: s.aMm, B: s.bMm, warnings: s.warnings,
         no: b.no,
         S: p.slopePct,
         L: p.L,
diff --git a/src/core/geometry.ts b/src/core/geometry.ts
index 91b6278..3af0d48 100644
--- a/src/core/geometry.ts
+++ b/src/core/geometry.ts
@@ -459,11 +459,13 @@ export function buildPier(input: PierInput, ctx: PierContext = {}): PierModel {
   }
 
   const blocks: BlockModel[] = [];
-  const bearingAz = new Map(input.bearings.map((r) => [r.no, r.azimuthDeg]));
+  // 계산 방위각을 적용한 받침 (2026-11-06): that value turns the block, bearing and solplate; the workbook value stays in input.
+  const azimuthOf = (r: { no: number; azimuthDeg: number }) => input.azimuthApplied?.[String(r.no)] ?? r.azimuthDeg;
+  const bearingAz = new Map(input.bearings.map((r) => [r.no, azimuthOf(r)]));
   const skewOf = (no: number, k: number) => rowSkewDeg(bearingAz.get(no) ?? NaN, axis.segments[k].u);
   // Solplate of every bearing (결정 2026-11-06): S from the girder pair (ctx.pairs over the whole bridge), else the
   // 종단경사 input, else the other row; T per row; the girder underside stays, so the block top drops by T − T_ref.
-  const soles = new Map(structureSoles(input.name, input.bearings.map((b) => ({ no: b.no, row: b.row, azimuthDeg: b.azimuthDeg })),
+  const soles = new Map(structureSoles(input.name, input.bearings.map((b) => ({ no: b.no, row: b.row, azimuthDeg: azimuthOf(b), inputAzimuthDeg: b.azimuthDeg })),
     input.sole, ctx.pairs ?? [], input.longitudinalSlope === undefined ? undefined : input.longitudinalSlope * 100).map((s) => [s.no, s]));
   const planOf = (no: number, k: number, skewDeg: number): SolplatePlan => {
     const s = soles.get(no)!;
diff --git a/src/core/sole-plate.ts b/src/core/sole-plate.ts
index fdb9a0e..71789ea 100644
--- a/src/core/sole-plate.ts
+++ b/src/core/sole-plate.ts
@@ -38,6 +38,9 @@ export interface BearingSole {
   pair?: { structure: string; no: number };
   /** 방위각 검사 (″): this bearing's input azimuth against the direction to its pair (Q-SH4, WS01 > 10″). Absent without a pair. */
   azimuthCheckSec?: number;
+  /** 입력 방위각 and the one computed from the pair (deg, model 진북); the second is absent without a pair. */
+  azimuthInputDeg: number;
+  azimuthCalcDeg?: number;
   /** girder (같은 거더) or chord (교대만, A1 ↔ A2 현). */
   pairKind?: 'girder' | 'chord';
   slopePct: number;
@@ -65,7 +68,10 @@ export interface BearingSole {
 export interface SoleBearing {
   no: number;
   row: string;
+  /** The azimuth in use (an applied 계산 방위각 when chosen) — for the 오르막 direction. */
   azimuthDeg: number;
+  /** The workbook azimuth, when it differs from the one in use. */
+  inputAzimuthDeg?: number;
 }
 
 const DEG = Math.PI / 180;
@@ -121,6 +127,8 @@ export function structureSoles(structure: string, bearings: SoleBearing[], setti
     return {
       no: b.no, row: b.row, pair: pair ? (pair.from.structure === structure ? pair.to : pair.from) : undefined,
       pairKind: pair?.kind,
+      azimuthInputDeg: b.inputAzimuthDeg ?? b.azimuthDeg,
+      azimuthCalcDeg: pair ? (pair.from.structure === structure && pair.from.no === b.no ? pair.fromCalcDeg : pair.toCalcDeg) : undefined,
       azimuthCheckSec: pair ? (pair.from.structure === structure && pair.from.no === b.no ? pair.fromCheckSec : pair.toCheckSec) : undefined,
       slopePct, slopeSource: source, aMm, bMm, L, W, T, tTyped: typed, T1, T2, tReq: req[i], h3: s.h3Mm,
       dropMm: T - s.tRefMm, uphill: sign ? { e: sign * dir.e, n: sign * dir.n } : null, warnings,
diff --git a/src/core/types.ts b/src/core/types.ts
index 5c585f6..cf6ed53 100644
--- a/src/core/types.ts
+++ b/src/core/types.ts
@@ -67,6 +67,8 @@ export interface PierInput {
   solplate?: SolplateRule;
   /** 솔플레이트 입력 (결정 2026-11-06, 시안): h3, T_ref, T_min, 여유, 받침별 A × B, 열 T·받침 S 직접 수정. Absent = 기본값. */
   sole?: SoleSettings;
+  /** 계산 방위각을 적용한 받침: 받침번호 → 방위각 (deg, model 진북). Absent = 엑셀 입력값 (2026-11-06). */
+  azimuthApplied?: Record<string, number>;
   /** 다주형 기둥 위치 입력 (Q-M10 미결): 끝 ~ 기둥1 중심 e_c, 기둥 간격 s_c (mm). Absent = L/5 규칙. */
   columnEndOffsetMm?: number;
   columnSpacingMm?: number;
diff --git a/src/main.ts b/src/main.ts
index 6caa92d..a57ba05 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -967,7 +967,7 @@ function fillAbutBearingCard(
   const m3 = (v: number) => v.toFixed(3);
   const H = rec.bearingHeightMm;
   // 솔플레이트 S: 짝 받침(P1 전열 등) 계산, 없으면 교대 종단경사 i (2026-11-06).
-  const ctx = { pairs: state.bridgePairs, slopeI: rec.slopeI };
+  const ctx = { pairs: state.bridgePairs, slopeI: rec.slopeI, inputAzimuthDeg: Object.fromEntries(rec.bearings.filter((b) => b.azimuthDeg !== undefined).map((b) => [String(b.no), b.azimuthDeg!])) };
   const elev = abutElevationRows(model, rule, H, ctx);
   const sol = abutSolplateRows(model, rule, H, ctx);
   // 상세 보기 (받침 ①–⑤): the three 삽도 draw the picked bearing.
@@ -1016,12 +1016,23 @@ function fillAbutBearingCard(
     ),
   );
   box.append(el('p', '솔플레이트 상세 TABLE (mm) · S는 같은 거더 양끝 받침에서 계산', 'lbl'));
-  box.append(
-    table(
-      ['No.', '짝 받침', '방위각 검사 (″)', 'S (%)', 'S 근거', 'L', 'W', 'T', 'T1 (오르막 쪽)', 'T2', '검산 T1 − T2 ≈ L·|S|/100', '검사'],
-      sol.map((r) => [String(r.no), r.pair ?? '없음', azimuthCheckText(r.azimuthSec, r.pairKind), r.S.toFixed(3), r.source, String(r.L), String(r.W), String(r.T), String(r.T1), String(r.T2), r.check, r.warnings.length ? r.warnings.join(' · ') : '—']),
-    ),
-  );
+  const setApplied = (next: Record<string, number> | undefined) => apply({ ...rec, azimuthApplied: next && Object.keys(next).length ? next : undefined });
+  box.append(azimuthBulk(sol, rec.azimuthApplied, setApplied));
+  {
+    const tbl = table(['No.', '짝 받침', ...AZIMUTH_HEADERS, 'S (%)', 'S 근거', 'L', 'W', 'T', 'T1 (오르막 쪽)', 'T2', '검산 T1 − T2 ≈ L·|S|/100', '검사'], []);
+    const body = tbl.tBodies[0];
+    for (const r of sol) {
+      const key = String(r.no);
+      const tr = body.insertRow();
+      tr.append(el('td', String(r.no)), el('td', r.pair ?? '없음'), ...azimuthCells(r.azimuthInputDeg, r.azimuthCalcDeg, r.pairKind, rec.azimuthApplied?.[key], (v) => {
+        const next = { ...(rec.azimuthApplied ?? {}) };
+        if (v === undefined) delete next[key]; else next[key] = v;
+        setApplied(next);
+      }));
+      for (const c of [r.S.toFixed(3), r.source, String(r.L), String(r.W), String(r.T), String(r.T1), String(r.T2), r.check, r.warnings.length ? r.warnings.join(' · ') : '—']) tr.append(el('td', c));
+    }
+    box.append(tbl);
+  }
   // 솔플레이트 입력 (결정 2026-11-06): 교각 카드와 같은 항목, 받침이 1열이라 T 하나.
   box.append(el('p', `솔플레이트 입력 (이 교대) · T = max(T_min, ⌈T_min + L·|S|/2⌉) · 거더 하면 고정 → 블럭 상면 = z − (T − T_ref)`, 'lbl'));
   const auto = sol[0];
@@ -5136,10 +5147,11 @@ function renderElevationTable(wrap: HTMLDivElement, pier: Pier): void {
 function renderSolplateTable(wrap: HTMLDivElement, pier: Pier): void {
   if (!pier.model) return;
   wrap.appendChild(el('p', '솔플레이트 TABLE (모델값 · mm) · S는 같은 거더 양끝 받침에서 계산', 'lbl'));
+  wrap.appendChild(azimuthBulk(solplateRows(pier.model), pier.draft.azimuthApplied, (next) => setAzimuthApplied(pier.input.name, next ?? {})));
   const table = el('table', undefined, 'grid-table rebar-table');
   const head = el('thead');
   const hr = el('tr');
-  for (const h of ['No', '짝 받침', '방위각 검사 (″)', 'S (%)', 'S 근거', 'A', 'B', 'L', 'W', 'T', 'T1 (오르막 쪽)', 'T2', '검산 T1 − T2 ≈ L·|S|/100', '검사']) hr.appendChild(el('th', h));
+  for (const h of ['No', '짝 받침', ...AZIMUTH_HEADERS, 'S (%)', 'S 근거', 'A', 'B', 'L', 'W', 'T', 'T1 (오르막 쪽)', 'T2', '검산 T1 − T2 ≈ L·|S|/100', '검사']) hr.appendChild(el('th', h));
   head.appendChild(hr);
   table.appendChild(head);
   const body = el('tbody');
@@ -5155,7 +5167,11 @@ function renderSolplateTable(wrap: HTMLDivElement, pier: Pier): void {
   for (const r of solplateRows(pier.model)) {
     const key = String(r.no);
     const tr = el('tr');
-    tr.append(el('td', String(r.no)), el('td', r.pair ?? '없음'), el('td', azimuthCheckText(r.azimuthSec, r.pairKind)));
+    tr.append(el('td', String(r.no)), el('td', r.pair ?? '없음'), ...azimuthCells(r.azimuthInputDeg, r.azimuthCalcDeg, r.pairKind, pier.draft.azimuthApplied?.[key], (v) => {
+      const next = { ...(pier.draft.azimuthApplied ?? {}) };
+      if (v === undefined) delete next[key]; else next[key] = v;
+      setAzimuthApplied(pier.input.name, next);
+    }));
     tr.appendChild(cellInput(Math.round(r.S * 1000) / 1000, r.source === '수정됨', `받침 ${r.no} S (%)`, (v) => {
       const next = { ...(settings.slopePct ?? {}) };
       if (v === undefined) delete next[key]; else next[key] = v;
@@ -5180,12 +5196,61 @@ function renderSolplateTable(wrap: HTMLDivElement, pier: Pier): void {
   wrap.appendChild(el('div', undefined, 'table-scroll')).appendChild(table);
 }
 
-/** 방위각 검사 칸 (Q-SH4): the difference to the pair direction in arc seconds, ≤ 10″ 통과 / > 10″ WS01; '—' without a pair. */
-function azimuthCheckText(sec: number | undefined, kind?: 'girder' | 'chord'): string {
-  if (sec === undefined) return '— (짝 없음)';
-  // 교대만 A1 ↔ A2 현: chord against the mean azimuth, for reference (the 10″ rule is for one girder).
-  if (kind === 'chord') return `현 ${sec.toFixed(0)}″ (참고)`;
-  return `${sec.toFixed(1)}″ ${sec > AZIMUTH_CHECK_SEC ? 'WS01' : '≤ 10″'}`;
+/** CAD 각 (엑셀과 같은 동 = 0° 반시계) as d°mm′ss.s″, from a model 진북 azimuth (deg). */
+function cadDms(az: number): string {
+  const cad = (((90 - az) % 360) + 360) % 360;
+  let d = Math.floor(cad), m = Math.floor((cad - d) * 60), s = Math.round(((cad - d) * 60 - m) * 600) / 10;
+  if (s >= 60) { s -= 60; m += 1; }
+  if (m >= 60) { m -= 60; d += 1; }
+  return `${d}°${String(m).padStart(2, '0')}′${s.toFixed(1).padStart(4, '0')}″`;
+}
+
+const AZIMUTH_HEADERS = ['방위각 입력 (CAD)', '방위각 계산 (CAD)', '차이 (″, 계산 − 입력)', '적용'];
+
+/**
+ * 방위각 입력 · 계산 · 차이 · 적용 칸 (2026-11-06). 계산 = 짝 받침 방향 (현 짝이면 원곡선 접선). The button applies the 계산
+ * 방위각 to the block / bearing / solplate rotation or goes back to the workbook value.
+ */
+function azimuthCells(input: number, calc: number | undefined, kind: 'girder' | 'chord' | undefined, applied: number | undefined, onSet: (value: number | undefined) => void): HTMLTableCellElement[] {
+  const cells = [el('td', cadDms(input))];
+  if (calc === undefined) return [...cells, el('td', '— (짝 없음)'), el('td', '—'), el('td', '—')];
+  // CAD runs the other way round from the 진북 azimuth, so the CAD difference is −(calc − input).
+  const sec = -(((calc - input + 540) % 360) - 180) * 3600;
+  const status = kind === 'chord' ? '현 · 참고' : Math.abs(sec) > AZIMUTH_CHECK_SEC ? 'WS01' : '≤ 10″';
+  cells.push(el('td', `${cadDms(calc)}${kind === 'chord' ? ' (현)' : ''}`), el('td', `${sec >= 0 ? '+' : ''}${sec.toFixed(1)}″ ${status}`));
+  const on = applied !== undefined;
+  const button = el('button', on ? '적용됨 · 입력값으로' : '계산값 적용', 'btn small');
+  button.type = 'button';
+  button.setAttribute('aria-pressed', String(on));
+  button.title = on ? `계산 방위각 ${cadDms(applied)} 사용 중 · 누르면 엑셀 입력값으로` : '블럭 · 받침 · 솔플레이트 회전에 계산 방위각을 씁니다';
+  button.addEventListener('click', () => onSet(on ? undefined : calc));
+  const td = el('td'); td.appendChild(button);
+  return [...cells, td];
+}
+
+/** '모두 적용 / 모두 입력값으로' buttons above a solplate table. */
+function azimuthBulk(rows: { no: number; azimuthCalcDeg?: number }[], applied: Record<string, number> | undefined, onSet: (next: Record<string, number> | undefined) => void): HTMLDivElement {
+  const box = el('div', undefined, 'btn-row');
+  const all = el('button', '계산 방위각 모두 적용', 'btn small');
+  all.type = 'button';
+  all.disabled = !rows.some((r) => r.azimuthCalcDeg !== undefined);
+  all.addEventListener('click', () => onSet(Object.fromEntries(rows.filter((r) => r.azimuthCalcDeg !== undefined).map((r) => [String(r.no), r.azimuthCalcDeg!]))));
+  const none = el('button', '모두 입력값으로', 'btn small');
+  none.type = 'button';
+  none.disabled = !applied || Object.keys(applied).length === 0;
+  none.addEventListener('click', () => onSet(undefined));
+  box.append(all, none, el('span', `적용 ${applied ? Object.keys(applied).length : 0}개 · 짝 찾기는 엑셀 입력값으로 합니다`, 'muted small'));
+  return box;
+}
+
+/** Sets the bearings that use the 계산 방위각 (2026-11-06) and rebuilds that pier. */
+function setAzimuthApplied(name: string, applied: Record<string, number>): void {
+  const p = state.piers.find((q) => q.input.name === name);
+  if (!p) return;
+  p.draft = { ...p.draft, azimuthApplied: Object.keys(applied).length ? applied : undefined };
+  state.piers = state.piers.map((q) => (q === p ? regenerateEntry(q) : q));
+  setupScene();
+  renderAll();
 }
 
 /** Sets one pier's solplate settings (2026-11-06) and rebuilds that pier. */
diff --git a/tests/bearing-pair.test.ts b/tests/bearing-pair.test.ts
index 0890b90..cc78af7 100644
--- a/tests/bearing-pair.test.ts
+++ b/tests/bearing-pair.test.ts
@@ -168,3 +168,46 @@ describe('교대만 (교각 0기): A1 ↔ A2 현 짝 (검토 2026-11-06)', () =>
     expect(bridgePairs([p1], [a1, abuts[3]]).some((p) => p.kind === 'chord')).toBe(false);
   });
 });
+
+describe('방위각 입력 · 계산 · 적용 (2026-11-06)', () => {
+  it('P1: the 계산 방위각 is the A1 girder direction (≤ 0.5″ from the input); the back row has none', async () => {
+    const { bridgePairs } = await import('../src/core/bridge-pairs');
+    const { buildPier } = await import('../src/core/geometry');
+    const m = buildPier(p1, { pairs: bridgePairs([p1], [a1]) });
+    for (const s of m.soles.filter((x) => x.row === '전열')) expect(Math.abs(s.azimuthCalcDeg! - s.azimuthInputDeg) * 3600).toBeLessThanOrEqual(0.5);
+    expect(m.soles.filter((x) => x.row === '후열').every((x) => x.azimuthCalcDeg === undefined)).toBe(true);
+  });
+
+  it('applying a value turns that block and keeps the workbook value as the input', async () => {
+    const { bridgePairs } = await import('../src/core/bridge-pairs');
+    const { buildPier } = await import('../src/core/geometry');
+    const pairs = bridgePairs([p1], [a1]);
+    const base = buildPier(p1, { pairs });
+    const turned = buildPier({ ...p1, azimuthApplied: { 3: p1.bearings[2].azimuthDeg + 1 } }, { pairs });
+    const skew = (m: typeof base, no: number) => m.blocks.find((b) => b.no === no)!.rowSkewDeg;
+    expect(skew(turned, 3) - skew(base, 3)).toBeCloseTo(1, 6);
+    expect(skew(turned, 2)).toBe(skew(base, 2));
+    expect(turned.soles.find((s) => s.no === 3)!.azimuthInputDeg).toBe(p1.bearings[2].azimuthDeg);
+  });
+
+  it('현 짝 (교대만): the 계산 방위각 is the arc tangent — equal to the input on a circular arc', async () => {
+    const { chordPairs } = await import('../src/core/bearing-pair');
+    const a2: PairStructure = { name: 'A2', bearings: A1.bearings.map((b) => {
+      const t = ((b.azimuthDeg - 4) * Math.PI) / 180;
+      return { ...b, x: b.x + 350 * Math.sin(t), y: b.y + 350 * Math.cos(t), azimuthDeg: b.azimuthDeg - 8, z: b.z - 6.65 };
+    }) };
+    const pairs = chordPairs([A1], [a2]);
+    expect(pairs).toHaveLength(5);
+    pairs.forEach((p, i) => {
+      expect(Math.abs(p.fromCalcDeg - A1.bearings[i].azimuthDeg) * 3600).toBeLessThan(0.5);
+      expect(Math.abs(p.toCalcDeg - a2.bearings[i].azimuthDeg) * 3600).toBeLessThan(0.5);
+    });
+  });
+
+  it('교대: an applied 계산 방위각 reaches the abutment model through toAbutInput', async () => {
+    const { toAbutInput } = await import('../src/core/abut/parse');
+    const input = toAbutInput({ ...a1, azimuthApplied: { 1: 10 } });
+    expect(input.bearings.find((b) => b.no === 1)!.azimuthDeg).toBe(10);
+    expect(input.bearings.find((b) => b.no === 2)!.azimuthDeg).toBe(a1.bearings[1].azimuthDeg);
+  });
+});