diff --git a/A00_Common/design/design_calc_sites.ts b/A00_Common/design/design_calc_sites.ts
new file mode 100644
index 000000000..7ecd81f8b
--- /dev/null
+++ b/A00_Common/design/design_calc_sites.ts
@@ -0,0 +1,59 @@
+/* =============================================================================
+ * design_calc_sites.ts
+ * 계산 자리 판(PLAN 504-2 · 요구 309-2) — B05 · B06 페이지 열 때 한 번 받아 페이지 수명 동안 씀.
+ * 판 = 서버 `resources/master_template/calc_sites.json`(`common_util_calc_sites.py`) · 쓰기 = 시스템 관리자
+ * 「계산 자리」 창(`B01_Dashboard_UI_CalcSites.ts`). 열린 페이지는 다음 열기부터 · 못 받으면 전부 both.
+ *   ground_sample(G1) server = ground 단계가 격자 대신 서버 표본(`B05_Profile_Api_TerrainGrid.ts`)
+ *   corridor_mesh(D3) server = 3D 미리보기 워커 안 띄움 · 서버 모형만(`B05_Profile_UI_Corridor_Worker_Client.ts`)
+ * ========================================================================== */
+
+import { API_BASE_URL } from "@config/config_frontend";
+
+export type CalcSiteValue = "both" | "server";
+
+export interface CalcSiteGroup {
+  key: string;
+  nos: string[];
+  switchable: boolean;
+  fixed: "both" | "server" | "browser" | null;
+  why: string | null;
+}
+
+export interface CalcSitesBoard {
+  version: number;
+  sites: Record<string, CalcSiteValue>;
+  groups: CalcSiteGroup[];
+}
+
+async function request(init: RequestInit = {}): Promise<CalcSitesBoard> {
+  const path = init.method === "PUT" ? "/dashboard/admin/calc-sites" : "/dashboard/calc-sites";
+  const response = await fetch(`${API_BASE_URL}${path}`, {
+    credentials: "include",
+    headers: { "Content-Type": "application/json" },
+    ...init,
+  });
+  const data = (await response.json()) as CalcSitesBoard & { detail?: string };
+  if (!response.ok) throw new Error(data.detail ?? `HTTP ${response.status}`);
+  return data;
+}
+
+export const fetchCalcSites = (): Promise<CalcSitesBoard> => request();
+
+export const saveCalcSites = (sites: Record<string, CalcSiteValue>): Promise<CalcSitesBoard> =>
+  request({ method: "PUT", body: JSON.stringify({ sites }) });
+
+let opened: Promise<Record<string, CalcSiteValue>> | null = null;
+
+/** 페이지 열 때 — 새로 받음(앞 페이지 판 버림). */
+export function openCalcSites(): Promise<Record<string, CalcSiteValue>> {
+  opened = fetchCalcSites().then(
+    (board) => board.sites,
+    () => ({}),
+  );
+  return opened;
+}
+
+/** 이 묶음을 조작 중에도 서버가 셈? — 받기 전이면 받기를 기다림. */
+export async function calcOnServer(key: string): Promise<boolean> {
+  return (await (opened ?? openCalcSites()))[key] === "server";
+}
diff --git a/A00_Common/design/design_page.ts b/A00_Common/design/design_page.ts
index 426a02c9a..4f0515c18 100644
--- a/A00_Common/design/design_page.ts
+++ b/A00_Common/design/design_page.ts
@@ -40,6 +40,7 @@ import { usePipeIds } from "./design_pipe_ids";
 import { createFacilityLane } from "./design_facility_lane";
 import { pinDraftProject } from "./design_store";
 import { pipelineDetail, reconcilePagePipeline } from "./design_pipeline_page";
+import { openCalcSites } from "./design_calc_sites";
 import { forgetPageData, onPageBusy } from "./design_page_data";
 import { pageRouteId } from "./design_page_route";
 import { setPipeSectionsSource } from "./design_structure_pipe_calc";
@@ -119,6 +120,7 @@ export function renderDesignPage(root: HTMLElement): MountedPage {
   root.replaceChildren(page);
   const projectId = localStorage.getItem(CURRENT_PROJECT_ID_KEY) ?? "";
   pinDraftProject(projectId); // 연 프로젝트 고정(388-3) — 다른 탭이 바꿔도 이 탭 초안 칸 그대로
+  void openCalcSites(); // 계산 자리 판(504-2) — 열 때 한 번 · 열린 동안 바뀐 판은 다음 열기부터
   usePipeIds(projectId || null); // 관 세션 id 장부 = 이 프로젝트(323-5 · 카드 · 알약 · 종단 · 3D 같은 id)
   // 관 길이 · 흙막이 개수 = 공용 캐시(페이지 노선) 한 벌 — 마지막 연 보기의 사본이 아님(416 · B05 = B06) ·
   // 노선 초안 동안 = 계산 줄 새 노선 상세(다시 센 횡단 · 428)
diff --git a/A00_Common/m_settings_nav.ts b/A00_Common/m_settings_nav.ts
index 432177a8e..73b09f8c7 100644
--- a/A00_Common/m_settings_nav.ts
+++ b/A00_Common/m_settings_nav.ts
@@ -16,7 +16,7 @@ interface SettingUser {
   company_id?: number | null;
 }
 
-/** key = M01 은 「m01」 · M02 는 진입 인자 `open` */
+/** key = M01 은 「m01」 · 계산 자리 창은 「calcSites」(대시보드 카드만 · 504-2) · M02 는 진입 인자 `open` */
 export interface SettingLink {
   key: string;
   title: string;
@@ -57,6 +57,12 @@ export function settingLinks(user: SettingUser, companyId: number | string | nul
       m02(L("B01_Dashboard_CardStructCombo"), "구조물조합", comboRoot("master"), desc),
       m02(L("B01_Dashboard_CardStructOption"), "옵션", "master", desc),
       m02(L("B01_Dashboard_CardDrawing"), "도면", "master", desc),
+      {
+        key: "calcSites",
+        title: L("B01_CalcSites_Title"),
+        desc: L("B01_CalcSites_Desc"),
+        route: ROUTES.B01_ACCOUNT,
+      },
     ];
   }
   // 회사 수정 = 회사 관리자 · 회사 마스터(M02 accessFor 와 같은 규칙)
@@ -76,7 +82,8 @@ export function mountSettingsDrawer(
   activeKey: string,
   companyId: number | string | null,
 ): void {
-  const links = settingLinks(user, companyId);
+  // 계산 자리 = 대시보드 창(504-2) — 페이지가 아니라 ☰ 에 안 둠
+  const links = settingLinks(user, companyId).filter((link) => link.key !== "calcSites");
   const bar = createStepBar(
     links.map((link) => link.title),
     links.findIndex((link) => link.key === activeKey),
diff --git a/B01_Dashboard/B01_Dashboard_Router.py b/B01_Dashboard/B01_Dashboard_Router.py
index 062cfcef8..654e249ec 100644
--- a/B01_Dashboard/B01_Dashboard_Router.py
+++ b/B01_Dashboard/B01_Dashboard_Router.py
@@ -7,9 +7,12 @@ from uuid import UUID
 from fastapi import APIRouter, Depends, HTTPException, Path, Query, Request, Response
 from pymysql.err import IntegrityError
 
+from common_util import common_util_calc_sites as calc_sites
+from common_util.common_util_audit import record_audit
 from common_util.common_util_auth import require_company, require_system_admin, verify_session
 from common_util.common_util_email import send_email
 from common_util.common_util_project_delete import hard_delete_project
+from config.config_db import get_db_pool
 from config.config_system import APP_PUBLIC_BASE_URL, PROJECT_DELETE_HARD_ENABLED
 
 from .B01_Dashboard_Knowledge_Chat import router as knowledge_chat_router
@@ -59,6 +62,7 @@ from .B01_Dashboard_Schema import (
     AddMemberRequest,
     AdminUpdateUserRequest,
     AssignCompanyRequest,
+    CalcSitesRequest,
     ChangeUserRoleRequest,
     CreateCompanyRequest,
     InviteMemberRequest,
@@ -579,5 +583,37 @@ async def system_projects(session: dict[str, Any] = Depends(require_system_admin
     return {"status": "success", "projects": await list_all_projects()}
 
 
+# ── 계산 자리 판(504-2) — 읽기 = 로그인 · 쓰기 = 시스템 관리자 · 바뀐 줄마다 시스템 로그 한 줄 ──
+@router.get("/calc-sites")
+async def read_calc_sites(session: dict[str, Any] = Depends(verify_session)):
+    _ = session
+    return {"status": "success", **calc_sites.read_sites(), "groups": calc_sites.GROUPS}
+
+
+@router.put("/admin/calc-sites")
+async def write_calc_sites(
+    payload: CalcSitesRequest,
+    request: Request,
+    session: dict[str, Any] = Depends(require_system_admin),
+):
+    try:
+        board, changed = calc_sites.write_sites(payload.sites)
+    except ValueError as error:
+        raise HTTPException(status_code=400, detail=str(error)) from error
+    if changed:
+        async with get_db_pool().acquire() as connection, connection.cursor() as cursor:
+            for key in changed:
+                await record_audit(
+                    cursor,
+                    actor_id=int(session["user_id"]),
+                    action="CALC_SITE_CHANGE",
+                    resource_type="calc_site",
+                    resource_ref=f"{key}={board['sites'][key]}",
+                    request=request,
+                )
+            await connection.commit()
+    return {"status": "success", **board, "groups": calc_sites.GROUPS, "changed": changed}
+
+
 router.include_router(assets_router)
 router.include_router(knowledge_chat_router)
diff --git a/B01_Dashboard/B01_Dashboard_Schema.py b/B01_Dashboard/B01_Dashboard_Schema.py
index 9218ab0d9..fe3346455 100644
--- a/B01_Dashboard/B01_Dashboard_Schema.py
+++ b/B01_Dashboard/B01_Dashboard_Schema.py
@@ -22,6 +22,12 @@ class UiPrefsRequest(BaseModel):
     prefs: dict[str, str] = Field(default_factory=dict)
 
 
+class CalcSitesRequest(BaseModel):
+    """계산 자리 판 고침(504-2) — 바꿀 줄만 · 줄 · 값 검사는 `common_util_calc_sites`."""
+
+    sites: dict[str, str] = Field(default_factory=dict)
+
+
 class CreateCompanyRequest(BaseModel):
     name: str = Field(min_length=1, max_length=255)
     business_registration_number: str = Field(min_length=1, max_length=20)
diff --git a/B01_Dashboard/B01_Dashboard_UI_CalcSites.ts b/B01_Dashboard/B01_Dashboard_UI_CalcSites.ts
new file mode 100644
index 000000000..7d54714c7
--- /dev/null
+++ b/B01_Dashboard/B01_Dashboard_UI_CalcSites.ts
@@ -0,0 +1,110 @@
+/* =============================================================================
+ * B01_Dashboard_UI_CalcSites.ts
+ * 「계산 자리」 창(PLAN 504-2 · 요구 309-2) — 시스템 관리자만(카드 = `settingLinks` · 쓰기 = 서버
+ * `require_system_admin`). 묶음 8 줄 · 칸 둘(「조작 중 브라우저 셈」 · 「[저장] 서버 정본」 늘 켬 · 잠금).
+ * 바꿀 수 있는 줄 = 서버 판 `groups[].switchable` · 나머지는 잠긴 체크 + 까닭 글.
+ * 고침은 창 안 사본에만 · [저장] 때만 바뀐 줄을 PUT(선례 `app_settings.ts`).
+ * ========================================================================== */
+
+import { createButton, el, showToast } from "@ui/ui_template_elements";
+import { table } from "@ui/ui_template_general_blocks";
+import { askLeave } from "@ui/ui_template_leave_dialog";
+import { openModal } from "@ui/ui_template_modal";
+import {
+  fetchCalcSites,
+  saveCalcSites,
+  type CalcSiteGroup,
+  type CalcSiteValue,
+  type CalcSitesBoard,
+} from "../A00_Common/design/design_calc_sites";
+import { L } from "./B01_Dashboard_UI_Common";
+
+type LocaleKey = Parameters<typeof L>[0];
+const K = (key: string): string => L(`B01_CalcSites_${key}` as LocaleKey);
+
+function check(checked: boolean, locked: boolean): HTMLInputElement {
+  const input = el("input", { attrs: { type: "checkbox" } });
+  input.checked = checked;
+  input.disabled = locked;
+  return input;
+}
+
+function groupRow(
+  group: CalcSiteGroup,
+  draft: Record<string, CalcSiteValue>,
+  changed: () => void,
+): HTMLElement[] {
+  const name = el("span", {
+    children: [el("strong", { text: K(group.key) }), ` (${group.nos.join(" ")})`],
+  });
+  const browser = group.switchable
+    ? check(draft[group.key] !== "server", false)
+    : check(group.fixed !== "server", true);
+  browser.dataset.calcSite = group.key;
+  browser.addEventListener("change", () => {
+    draft[group.key] = browser.checked ? "both" : "server";
+    changed();
+  });
+  const server = check(group.fixed !== "browser", true);
+  return [name, browser, server, el("span", { text: K(`Why_${group.why ?? group.key}`) })];
+}
+
+/** 시스템 설정 「계산 자리」 카드 — 판을 받아 창을 엶. */
+export async function openCalcSitesDialog(): Promise<void> {
+  let board: CalcSitesBoard;
+  try {
+    board = await fetchCalcSites();
+  } catch (error) {
+    showToast(error instanceof Error ? error.message : K("LoadFailed"), "error");
+    return;
+  }
+  const draft = { ...board.sites };
+  const dirty = (): Record<string, CalcSiteValue> =>
+    Object.fromEntries(Object.entries(draft).filter(([key, value]) => board.sites[key] !== value));
+  const count = el("p", { className: "b01-dashboard__calc-count" });
+  const recount = (): void => {
+    const n = Object.values(draft).filter((value) => value === "server").length;
+    count.textContent = K("ServerCount").replace("{value}", String(n));
+  };
+  recount();
+
+  const save = async (): Promise<boolean> => {
+    const changes = dirty();
+    if (!Object.keys(changes).length) return true;
+    try {
+      board = await saveCalcSites(changes);
+    } catch (error) {
+      showToast(error instanceof Error ? error.message : String(error), "error");
+      return false;
+    }
+    showToast(K("Saved"), "success");
+    return true;
+  };
+  const saveButton = createButton({
+    label: L("Common_Btn_Save"),
+    variant: "filled",
+    onClick: () => void save().then((ok) => ok && modal.close()),
+  });
+  const modal = openModal({
+    title: K("Title"),
+    closeLabel: L("Common_Btn_Close"),
+    dialogClass: "b01-dashboard__calc-sites",
+    wide: true,
+    actions: [saveButton],
+    beforeClose: async () => {
+      if (!Object.keys(dirty()).length) return true;
+      const choice = await askLeave(K("Leave"));
+      return choice === "discard" || (choice === "save" && (await save()));
+    },
+    mount: (body) => {
+      body.append(
+        count,
+        el("p", { className: "b01-dashboard__calc-note", text: K("NextOpen") }),
+        table(
+          [K("Col_Group"), K("Col_Browser"), K("Col_Server"), K("Col_Why")],
+          board.groups.map((group) => groupRow(group, draft, recount)),
+        ),
+      );
+    },
+  });
+}
diff --git a/B01_Dashboard/B01_Dashboard_UI_Page.ts b/B01_Dashboard/B01_Dashboard_UI_Page.ts
index 82515ecfc..c56b848d1 100644
--- a/B01_Dashboard/B01_Dashboard_UI_Page.ts
+++ b/B01_Dashboard/B01_Dashboard_UI_Page.ts
@@ -33,6 +33,7 @@ import {
   type ResourceData,
 } from "./B01_Dashboard_Api_Fetch";
 import { auditLogTable, userTable } from "./B01_Dashboard_UI_Admin";
+import { openCalcSitesDialog } from "./B01_Dashboard_UI_CalcSites";
 import { L, roleLabel } from "./B01_Dashboard_UI_Common";
 import {
   buildCompanyPanel,
@@ -165,13 +166,15 @@ function settingCard(title: string, desc: string, go: () => void): HTMLElement {
   return card;
 }
 
-/** 시스템 설정 — 카드 규칙은 `settingLinks` 한 벌(☰ 바로가기와 같이 씀 · 334) */
+/** 시스템 설정 — 카드 규칙은 `settingLinks` 한 벌(☰ 바로가기와 같이 씀 · 334) · 계산 자리 = 창(504-2) */
 function buildSystemSettingsPanel(user: DashboardUser, companyId: number | null): HTMLElement {
   const wrap = document.createElement("div");
   wrap.className = "b01-dashboard__setting-grid";
   wrap.append(
     ...settingLinks(user, companyId).map((link) =>
-      settingCard(link.title, link.desc, () => navigateTo(link.route, link.query)),
+      settingCard(link.title, link.desc, () =>
+        link.key === "calcSites" ? void openCalcSitesDialog() : navigateTo(link.route, link.query),
+      ),
     ),
   );
   return wrap;
diff --git a/B05_Profile/B05_Profile_Api_TerrainGrid.ts b/B05_Profile/B05_Profile_Api_TerrainGrid.ts
index 14d5387c6..405d627e8 100644
--- a/B05_Profile/B05_Profile_Api_TerrainGrid.ts
+++ b/B05_Profile/B05_Profile_Api_TerrainGrid.ts
@@ -12,6 +12,7 @@
 
 import { API_BASE_URL } from "@config/config_frontend";
 import { fetchCachedBytes } from "../A00_Common/b_asset_cache";
+import { calcOnServer } from "../A00_Common/design/design_calc_sites";
 import { type DtmGrid, parseDtmGrid } from "../common_util/common_util_surface_sampler";
 import type { GroundStageDeps } from "./logic/B05_Profile_Pipeline_RouteGround";
 
@@ -74,9 +75,12 @@ export function designTerrainGridNow(projectId: string): DesignTerrainGrid | nul
 const ELEVATION_CHUNK = 4000;
 
 /** 계산 묶음 ground 단계에 넣을 격자 · 서버 길(PLAN 346-1). 서버 길도 소수 6자리 — 격자 길과 같은 값. */
-export function groundStageDeps(projectId: string): Pick<GroundStageDeps, "grid" | "remote"> {
+export function groundStageDeps(
+  projectId: string,
+): Pick<GroundStageDeps, "grid" | "remote" | "serverOnly"> {
   return {
     grid: () => designTerrainGridNow(projectId),
+    serverOnly: () => calcOnServer("ground_sample"),
     async remote(points, terrain, signal) {
       const chunks: Array<Array<[number, number]>> = [];
       for (let i = 0; i < points.length; i += ELEVATION_CHUNK) {
diff --git a/B05_Profile/B05_Profile_UI_Corridor_Worker_Client.ts b/B05_Profile/B05_Profile_UI_Corridor_Worker_Client.ts
index 8d2f43114..fe9cf0958 100644
--- a/B05_Profile/B05_Profile_UI_Corridor_Worker_Client.ts
+++ b/B05_Profile/B05_Profile_UI_Corridor_Worker_Client.ts
@@ -5,6 +5,7 @@
  * 워커는 처음 부를 때 하나 세워 페이지 수명 동안 다시 쓴다.
  * ========================================================================== */
 
+import { calcOnServer } from "../A00_Common/design/design_calc_sites";
 import type { RoutePoint } from "./B05_Profile_Api_Fetch";
 import type { CrossSection } from "../B06_Section/B06_Section_Api_Fetch";
 import { buildCorridor, type CorridorBuildResult } from "./B05_Profile_UI_Corridor_Build";
@@ -48,12 +49,14 @@ function getWorker(): Worker | null {
   return worker;
 }
 
-/** 초안 미리보기 짓기 — 결과는 `buildCorridor` 와 같음(같은 입력 · 같은 함수). */
+/** 초안 미리보기 짓기 — 결과는 `buildCorridor` 와 같음(같은 입력 · 같은 함수).
+ *  계산 자리 판(504-2) D3 = server 면 안 지음(null) — 서버가 [저장] · [확정] 때 지은 모형만. */
 export async function buildCorridorOffThread(
   crossSections: CrossSection[],
   routePoints: RoutePoint[],
   designSamples?: Samples,
 ): Promise<CorridorBuildResult | null> {
+  if (await calcOnServer("corridor_mesh")) return null;
   const onMain = (): CorridorBuildResult | null =>
     buildCorridor(crossSections, routePoints, designSamples);
   const target = getWorker();
diff --git a/B05_Profile/logic/B05_Profile_Pipeline_RouteGround.ts b/B05_Profile/logic/B05_Profile_Pipeline_RouteGround.ts
index 3d19b2e53..e18bb4642 100644
--- a/B05_Profile/logic/B05_Profile_Pipeline_RouteGround.ts
+++ b/B05_Profile/logic/B05_Profile_Pipeline_RouteGround.ts
@@ -102,6 +102,8 @@ export interface GroundStageDeps {
     terrain: string | null,
     signal: AbortSignal,
   ): Promise<Array<number | null>>;
+  /** 계산 자리 판(504-2) G1 = server — 격자가 있어도 서버 길 · 격자는 cross 도 쓰므로 여기서만 가름. */
+  serverOnly?(): boolean | Promise<boolean>;
   /** 횡단 반폭(m) — 비면 서버 기본(20 m). */
   crossHalfWidthM?(): number | null;
 }
@@ -122,7 +124,7 @@ export function createGroundStage(deps: GroundStageDeps): StageFn<"ground"> {
     const terrain = ctx.inputs.route?.terrain ?? null;
     const halfWidth = deps.crossHalfWidthM?.() ?? SECTION_CROSS_HALF_WIDTH_M;
     const offsets = crossOffsets(halfWidth, SECTION_CROSS_SAMPLE_INTERVAL_M);
-    const local = deps.grid();
+    const local = (await deps.serverOnly?.()) ? null : deps.grid();
     const useGrid = local !== null && (terrain === null || terrain === local.design);
 
     const tag = terrain ?? "design";
diff --git a/common_util/common_util_calc_sites.py b/common_util/common_util_calc_sites.py
new file mode 100644
index 000000000..cc84fe57d
--- /dev/null
+++ b/common_util/common_util_calc_sites.py
@@ -0,0 +1,101 @@
+"""계산 자리 판(PLAN 504-2 · 요구 309-2) — 시스템 관리자 「계산 자리」 창이 읽고 쓰는 판 하나.
+
+판 = `resources/master_template/calc_sites.json` `{version, sites: {묶음: "both" | "server"}}`.
+both = 조작 중 브라우저 셈 + [저장] 서버 정본(지금 등록부 자리) · server = 조작 중에도 서버 길.
+판이 없거나 깨지면 기본값(전부 both = 등록부 그대로). [저장] · [확정] 서버 정본 길은 판을 안 읽음.
+묶음 8 줄 = 등록부(`design_calc_registry*.ts`) # 전부 · 같은지 시험 `test_309_2_calc_sites.py`.
+"""
+
+from __future__ import annotations
+
+import json
+import os
+from pathlib import Path
+from typing import Any
+
+ROOT = Path(__file__).resolve().parents[1]
+PATH = ROOT / "resources" / "master_template" / "calc_sites.json"
+VALUES = ("both", "server")
+
+# 묶음 · 등록부 # · 바꿀 수 있음 · 잠금 줄의 고정 자리(both · server · browser) · 까닭 열쇠
+GROUPS: tuple[dict[str, Any], ...] = (
+    {"key": "ground_sample", "nos": ["G1"], "switchable": True, "fixed": None, "why": None},
+    {"key": "corridor_mesh", "nos": ["D3"], "switchable": True, "fixed": None, "why": None},
+    {
+        "key": "quantity",
+        "nos": ["E1", "F7", "F8", "C4"],
+        "switchable": False,
+        "fixed": "both",
+        "why": "later",
+    },
+    {"key": "carry", "nos": ["R9", "F10"], "switchable": False, "fixed": "both", "why": "later"},
+    {
+        "key": "stages",
+        "nos": ["R1", "R3", "R5", "R6", "R7", "G2", "G4", "P1", "P2", "P3", "P4", "P5", "P6"]
+        + ["P8", "C1", "C2", "C3", "C5", "C6", "F1", "F2", "F3", "F4"],
+        "switchable": False,
+        "fixed": "both",
+        "why": "pair_later",
+    },
+    {
+        "key": "structure_pair",
+        "nos": ["F5", "F6", "F9"],
+        "switchable": False,
+        "fixed": "both",
+        "why": "pair",
+    },
+    {
+        "key": "fixed_server",
+        "nos": ["E2", "G3", "D1", "D2", "N1"],
+        "switchable": False,
+        "fixed": "server",
+        "why": "server",
+    },
+    {
+        "key": "fixed_browser",
+        "nos": ["R2", "R4", "R8", "P7", "C7", "D4"],
+        "switchable": False,
+        "fixed": "browser",
+        "why": "browser",
+    },
+)
+SWITCHABLE = frozenset(g["key"] for g in GROUPS if g["switchable"])
+LOCKED = frozenset(g["key"] for g in GROUPS if not g["switchable"])
+
+
+def read_sites() -> dict[str, Any]:
+    """판 — 없음 · 깨짐 · 모르는 값 = 그 줄 기본값(both)."""
+    try:
+        raw = json.loads(PATH.read_text(encoding="utf-8"))
+    except (OSError, ValueError):
+        raw = {}
+    stored = raw.get("sites") if isinstance(raw, dict) else None
+    stored = stored if isinstance(stored, dict) else {}
+    sites = {key: stored.get(key) if stored.get(key) in VALUES else "both" for key in SWITCHABLE}
+    version = raw.get("version") if isinstance(raw, dict) else None
+    return {"version": version if isinstance(version, int) else 0, "sites": sites}
+
+
+def check_changes(changes: dict[str, str]) -> None:
+    """잠금 줄 · 모르는 줄 · 모르는 값 = ValueError(창구가 400)."""
+    for key, value in changes.items():
+        if key in LOCKED:
+            raise ValueError(f"잠긴 줄 — {key}")
+        if key not in SWITCHABLE:
+            raise ValueError(f"모르는 줄 — {key}")
+        if value not in VALUES:
+            raise ValueError(f"모르는 값 — {key}={value}")
+
+
+def write_sites(changes: dict[str, str]) -> tuple[dict[str, Any], list[str]]:
+    """검사 → 바뀐 줄만 얹어 판 번호 +1 · 통째 바꿔 씀(반쯤 쓴 판 없음). 돌려줌 = 새 판 · 바뀐 줄."""
+    check_changes(changes)
+    current = read_sites()
+    changed = sorted(k for k, v in changes.items() if current["sites"][k] != v)
+    if not changed:
+        return current, []
+    board = {"version": current["version"] + 1, "sites": {**current["sites"], **changes}}
+    temp = PATH.with_suffix(".json.tmp")
+    temp.write_text(json.dumps(board, ensure_ascii=False, indent=2) + "\n", encoding="utf-8")
+    os.replace(temp, PATH)
+    return board, changed
diff --git a/resources/master_template/calc_sites.json b/resources/master_template/calc_sites.json
new file mode 100644
index 000000000..f88037ca8
--- /dev/null
+++ b/resources/master_template/calc_sites.json
@@ -0,0 +1,7 @@
+{
+  "version": 1,
+  "sites": {
+    "ground_sample": "both",
+    "corridor_mesh": "both"
+  }
+}
diff --git a/resources/tester/test_225_drawer_shortcuts.py b/resources/tester/test_225_drawer_shortcuts.py
index c7fdd1550..30d355060 100644
--- a/resources/tester/test_225_drawer_shortcuts.py
+++ b/resources/tester/test_225_drawer_shortcuts.py
@@ -90,7 +90,7 @@ def _settings(user: dict, active: str, company) -> dict:
     icons = re.search(r"^const ICONS.*$", src, re.M).group(0)
     script = (
         "const ROUTES = { M01_MASTER_DATA: 'm01-master-data',"
-        " M02_MASTER_TEMPLATE: 'm02-master-template' };\n"
+        " M02_MASTER_TEMPLATE: 'm02-master-template', B01_ACCOUNT: 'b01-account' };\n"
         "const L = (k: string) => k;\nlet bar: any = null;\n"
         "const createStepBar = (titles: string[], active: number, o: any) =>"
         " ({ titles, active, icons: o.icons, home: o.homeButton, routes: o.routes });\n"
@@ -118,8 +118,10 @@ def test_설정_바로가기_역할_셋_지금_칸():
         ["구조물조합", M02, {"open": "구조물조합", "root": "personal", "company": "3"}],
         ["옵션", M02, {"open": "옵션", "root": "master", "company": "3"}],
         ["도면", M02, {"open": "도면", "root": "master", "company": "3"}],
+        ["calcSites", "b01-account", None],  # 계산 자리(504-2) = 대시보드 카드만 · ☰ 엔 없음
     ]
     bar = admin["bar"]
+    assert len(bar["titles"]) == 4
     assert bar["active"] == 2 and bar["home"] is True
     assert bar["icons"] == ["🗄️", "🧱", "🎛️", "📑"]
     assert _settings({"role": "SYSTEM_ADMIN"}, "m01", None)["bar"]["active"] == 0
diff --git a/resources/tester/test_309_2_calc_sites.py b/resources/tester/test_309_2_calc_sites.py
new file mode 100644
index 000000000..4ec5fa4ec
--- /dev/null
+++ b/resources/tester/test_309_2_calc_sites.py
@@ -0,0 +1,260 @@
+"""PLAN 504-2 (요구 309-2 · 310) — 계산 자리 판 · 시스템 관리자 창구 · G1 · D3 연결.
+
+못박는 것
+  - 묶음 8 줄 = 등록부 # 전부(45 · 겹침 없음) · 바꿀 수 있는 줄(G1 · D3) = browser_now · 고정 줄 = 그 자리.
+  - 커밋한 판 = 기본값(전부 both = 등록부 그대로) · 판 없음 · 깨짐 = 기본값.
+  - GET = 로그인 · PUT = 시스템 관리자만(ADMIN · USER 403) · 잠금 · 모르는 줄 · 값 = 400 · 바뀐 줄마다
+    시스템 로그 CALC_SITE_CHANGE 한 줄 · 같은 값 = 판 · 로그 그대로.
+  - ground 단계 = 판(serverOnly) 따라 격자 · 서버 길 · cross 의 격자는 그대로 · D3 = 워커 안 띄움.
+  - 카드 = 시스템 관리자 갈래에만.
+
+    ./venv/Scripts/python.exe -m pytest resources/tester/test_309_2_calc_sites.py -q
+"""
+
+from __future__ import annotations
+
+import json
+import re
+import shutil
+import subprocess
+import sys
+from pathlib import Path
+
+import pytest
+from fastapi import FastAPI
+from fastapi.testclient import TestClient
+
+ROOT = Path(__file__).resolve().parents[2]
+if str(ROOT) not in sys.path:
+    sys.path.insert(0, str(ROOT))
+
+from B01_Dashboard import B01_Dashboard_Router as dash  # noqa: E402
+from common_util import common_util_calc_sites as calc_sites  # noqa: E402
+from common_util.common_util_auth import verify_session  # noqa: E402
+
+REGISTRY = (
+    ROOT / "A00_Common/design/logic/design_calc_registry.ts",
+    ROOT / "A00_Common/design/logic/design_calc_registry_facility.ts",
+)
+TSC = ROOT / "config" / "node_modules" / "typescript" / "bin" / "tsc"
+
+
+def _text(rel: str) -> str:
+    return (ROOT / rel).read_text(encoding="utf-8")
+
+
+def _registry_sites() -> dict[str, str]:
+    pairs: dict[str, str] = {}
+    for path in REGISTRY:
+        src = path.read_text(encoding="utf-8")
+        for no, site in re.findall(r'no: "(\w+)",[\s\S]*?site: "(\w+)"', src):
+            pairs[no] = site
+    return pairs
+
+
+def test_묶음_여덟_줄_등록부_전부():
+    sites = _registry_sites()
+    assert len(sites) == 45
+    nos = [no for group in calc_sites.GROUPS for no in group["nos"]]
+    assert len(calc_sites.GROUPS) == 8
+    assert len(nos) == len(set(nos)) and set(nos) == set(sites)
+    assert calc_sites.SWITCHABLE == {"ground_sample", "corridor_mesh"}
+    for group in calc_sites.GROUPS:
+        got = {sites[no] for no in group["nos"]}
+        if group["switchable"] or group["fixed"] == "both":
+            assert got == {"browser_now"}, group["key"]
+        elif group["fixed"] == "server":
+            assert got <= {"server_canon", "server_only"}, group["key"]
+        else:
+            assert got == {"browser_only"}, group["key"]
+    by_key = {g["key"]: g["nos"] for g in calc_sites.GROUPS}
+    assert by_key["ground_sample"] == ["G1"] and by_key["corridor_mesh"] == ["D3"]
+
+
+def test_커밋한_판_기본값_없음_깨짐(tmp_path, monkeypatch):
+    committed = json.loads(calc_sites.PATH.read_text(encoding="utf-8"))
+    assert committed["sites"] == {"ground_sample": "both", "corridor_mesh": "both"}
+    assert set(calc_sites.read_sites()["sites"].values()) == {"both"}
+    monkeypatch.setattr(calc_sites, "PATH", tmp_path / "none.json")
+    assert calc_sites.read_sites() == {
+        "version": 0,
+        "sites": {"ground_sample": "both", "corridor_mesh": "both"},
+    }
+    broken = tmp_path / "broken.json"
+    broken.write_text('{"sites": {"ground_sample": "server", "corridor_mesh": "x"', "utf-8")
+    monkeypatch.setattr(calc_sites, "PATH", broken)
+    assert set(calc_sites.read_sites()["sites"].values()) == {"both"}
+
+
+class _Cursor:
+    def __init__(self, log: list):
+        self.log = log
+
+    async def execute(self, sql, args=None):
+        self.log.append((sql, args))
+
+    async def __aenter__(self):
+        return self
+
+    async def __aexit__(self, *exc):
+        return False
+
+
+class _Conn(_Cursor):
+    def cursor(self):
+        return _Cursor(self.log)
+
+    async def commit(self):
+        self.log.append(("COMMIT", None))
+
+
+class _Pool:
+    def __init__(self, log: list):
+        self.log = log
+
+    def acquire(self):
+        return _Conn(self.log)
+
+
+@pytest.fixture
+def client(tmp_path, monkeypatch):
+    board = tmp_path / "calc_sites.json"
+    board.write_text(calc_sites.PATH.read_text(encoding="utf-8"), "utf-8")
+    monkeypatch.setattr(calc_sites, "PATH", board)
+    log: list = []
+    monkeypatch.setattr(dash, "get_db_pool", lambda: _Pool(log))
+    app = FastAPI()
+    app.include_router(dash.router)
+    role = {"role": "SYSTEM_ADMIN"}
+    app.dependency_overrides[verify_session] = lambda: {"role": role["role"], "user_id": 7}
+    return TestClient(app), role, board, log
+
+
+def test_읽기_로그인_쓰기_시스템_관리자만(client):
+    http, role, board, log = client
+    before = board.read_text("utf-8")
+    for name in ("USER", "ADMIN"):
+        role["role"] = name
+        got = http.get("/api/dashboard/calc-sites")
+        assert got.status_code == 200
+        assert got.json()["sites"]["ground_sample"] == "both"
+        assert [g["key"] for g in got.json()["groups"]][:2] == ["ground_sample", "corridor_mesh"]
+        put = http.put(
+            "/api/dashboard/admin/calc-sites", json={"sites": {"ground_sample": "server"}}
+        )
+        assert put.status_code == 403, name
+    assert board.read_text("utf-8") == before and log == []
+
+
+def test_잠금_모르는_줄_400_감사_한_줄(client):
+    http, _role, board, log = client
+    url = "/api/dashboard/admin/calc-sites"
+    for bad in ({"stages": "server"}, {"fixed_server": "both"}, {"nope": "server"}):
+        assert http.put(url, json={"sites": bad}).status_code == 400, bad
+    assert http.put(url, json={"sites": {"ground_sample": "browser"}}).status_code == 400
+    assert log == []
+
+    done = http.put(url, json={"sites": {"ground_sample": "server"}})
+    assert done.status_code == 200 and done.json()["changed"] == ["ground_sample"]
+    saved = json.loads(board.read_text("utf-8"))
+    assert saved == {"version": 2, "sites": {"ground_sample": "server", "corridor_mesh": "both"}}
+    inserts = [args for sql, args in log if "system_audit_logs" in sql]
+    assert len(inserts) == 1
+    assert inserts[0][:5] == (7, "CALC_SITE_CHANGE", "calc_site", None, "ground_sample=server")
+    assert log[-1][0] == "COMMIT"
+
+    # 같은 값 = 판 번호 · 로그 그대로
+    again = http.put(url, json={"sites": {"ground_sample": "server"}})
+    assert again.json()["changed"] == [] and json.loads(board.read_text("utf-8"))["version"] == 2
+    assert len([1 for sql, _ in log if "system_audit_logs" in sql]) == 1
+    # 되돌림
+    http.put(url, json={"sites": {"ground_sample": "both"}})
+    assert json.loads(board.read_text("utf-8"))["sites"]["ground_sample"] == "both"
+
+
+_RUNNER = """
+import { createGroundStage } from "./B05_Profile/logic/B05_Profile_Pipeline_RouteGround.js";
+const axis = Float64Array.from({ length: 61 }, (_, i) => i);
+const grid = { x: axis, y: axis, z: new Float32Array(61 * 61).fill(5),
+  validBits: new Uint8Array(Math.ceil((61 * 61) / 8)).fill(255) };
+const run = async (serverOnly) => {
+  const calls = [];
+  const stage = createGroundStage({
+    grid: () => ({ grid, design: "las" }),
+    remote: async (points) => { calls.push(points.length); return points.map(() => 9); },
+    ...(serverOnly === undefined ? {} : { serverOnly }),
+  });
+  const station = { key: "k0", chainageM: 0, x: 30, y: 30, azimuthDeg: 0, left: [0, 1],
+    kind: "grid", id: null, ground: null };
+  const out = await stage({
+    generation: 1, range: null, signal: new AbortController().signal,
+    inputs: { route: null }, out: { stations: [station], route: null }, before: {}, prev: null,
+  });
+  return { calls: calls.length, center: out.stations[0].ground.centerZ };
+};
+console.log(JSON.stringify([
+  await run(undefined), await run(() => false), await run(async () => true), await run(() => true),
+]));
+"""
+
+
+@pytest.mark.skipif(shutil.which("node") is None or not TSC.exists(), reason="node · tsc 없음")
+def test_ground_판_따라_길_고름(tmp_path):
+    out = tmp_path / "js"
+    subprocess.run(  # noqa: S603 — 고정 실행 파일
+        ["node", str(TSC), str(ROOT / "B05_Profile/logic/B05_Profile_Pipeline_RouteGround.ts"),
+         "--outDir", str(out), "--rootDir", str(ROOT), "--module", "esnext", "--target", "es2022",
+         "--moduleResolution", "bundler", "--ignoreConfig"],
+        cwd=str(ROOT), check=True, capture_output=True,
+    )  # fmt: skip
+    for emitted in out.rglob("*.js"):
+        emitted.write_text(
+            re.sub(r'(from\s+"\.\.?/[^"]+)"', r'\1.js"', emitted.read_text(encoding="utf-8")),
+            encoding="utf-8",
+        )
+    (out / "runner.mjs").write_text(_RUNNER, encoding="utf-8")
+    result = subprocess.run(  # noqa: S603
+        ["node", str(out / "runner.mjs")], capture_output=True, text=True, timeout=60
+    )
+    assert result.returncode == 0, result.stderr
+    grid, off, server_async, server = json.loads(result.stdout)
+    assert grid == off == {"calls": 0, "center": 5}  # 판 없음 · both = 격자
+    assert server_async == server and server["calls"] == 1 and server["center"] == 9
+
+
+def test_연결_자리_cross_격자_그대로():
+    deps = _text("B05_Profile/B05_Profile_Api_TerrainGrid.ts")
+    assert "grid: () => designTerrainGridNow(projectId)," in deps  # cross 가 같이 쓰는 격자
+    assert 'serverOnly: () => calcOnServer("ground_sample"),' in deps
+    stage = _text("B05_Profile/logic/B05_Profile_Pipeline_RouteGround.ts")
+    assert "const local = (await deps.serverOnly?.()) ? null : deps.grid();" in stage
+    page = _text("A00_Common/design/design_pipeline_page.ts")
+    assert len(page.splitlines()) <= 699
+    assert "createCrossStage({ grid: groundDeps.grid })" in page
+    assert "calc_sites" not in page and "calcOnServer" not in page
+    worker = _text("B05_Profile/B05_Profile_UI_Corridor_Worker_Client.ts")
+    body = worker.split("export async function buildCorridorOffThread(")[1]
+    assert body.index('if (await calcOnServer("corridor_mesh")) return null;') < body.index(
+        "getWorker()"
+    )
+    assert "void openCalcSites();" in _text("A00_Common/design/design_page.ts")
+    # 저장 길은 판을 안 읽음
+    for rel in ("A00_Common/design/design_save.ts", "A00_Common/design/design_save_api.ts"):
+        assert "calc_sites" not in _text(rel) and "calcOnServer" not in _text(rel)
+
+
+def test_카드_시스템_관리자만_글_다_있음():
+    nav = _text("A00_Common/m_settings_nav.ts")
+    links = nav.split("export function mountSettingsDrawer")[0]
+    admin, rest = links.split('if (user.role === "SYSTEM_ADMIN") {')[1].split("// 회사 수정 =")
+    assert 'key: "calcSites"' in admin and "calcSites" not in rest
+    assert 'settingLinks(user, companyId).filter((link) => link.key !== "calcSites")' in nav
+    page = _text("B01_Dashboard/B01_Dashboard_UI_Page.ts")
+    assert 'link.key === "calcSites" ? void openCalcSitesDialog()' in page
+    locale = _text("ui_template/ui_template_locale_m1.ts")
+    for group in calc_sites.GROUPS:
+        assert f"B01_CalcSites_{group['key']}:" in locale, group["key"]
+        assert f"B01_CalcSites_Why_{group['why'] or group['key']}:" in locale, group["key"]
+    ui = _text("B01_Dashboard/B01_Dashboard_UI_CalcSites.ts")
+    assert 'check(group.fixed !== "browser", true)' in ui  # 서버 정본 칸 = 늘 잠금
+    assert "saveCalcSites(changes)" in ui and "dirty()" in ui  # 바뀐 줄만 PUT
diff --git a/resources/tester/test_b01_settings_cards.py b/resources/tester/test_b01_settings_cards.py
index 7798ddfd2..4de5cb487 100644
--- a/resources/tester/test_b01_settings_cards.py
+++ b/resources/tester/test_b01_settings_cards.py
@@ -35,11 +35,12 @@ def _cards(user: dict, company_id: int | None = None) -> list:
     script = (
         "interface DashboardUser { role: string; is_master: boolean }\n"
         "const ROUTES = { M01_MASTER_DATA: 'm01-master-data',"
-        " M02_MASTER_TEMPLATE: 'm02-master-template' };\n"
+        " M02_MASTER_TEMPLATE: 'm02-master-template', B01_ACCOUNT: 'b01-account' };\n"
         "const L = (k: string) => k;\n"
         "let went = '';\n"
         "const navigateTo = (r: string, q?: Record<string, string>) =>"
         " { went = r + (q ? '?' + new URLSearchParams(q) : ''); };\n"
+        "const openCalcSitesDialog = async () => { went = 'calc-sites-dialog'; };\n"
         "const mk = (): any => ({ children: [] as any[], textContent: '', className: '',"
         " on: null as any,"
         " append(...c: any[]) { this.children.push(...c); },"
@@ -66,6 +67,8 @@ def _cards(user: dict, company_id: int | None = None) -> list:
 
 
 M02 = "m02-master-template"
+# 계산 자리(504-2) — 시스템 관리자만 · 이동 대신 창
+CALC_SITES = ["B01_CalcSites_Title", "B01_CalcSites_Desc", "calc-sites-dialog"]
 READ_CO = (
     "B01_Dashboard_PermMasterRead · B01_Dashboard_PermCompanyRead · B01_Dashboard_PermPersonalWrite"
 )
@@ -73,13 +76,14 @@ WRITE_CO = READ_CO.replace("CompanyRead", "CompanyWrite")
 
 
 @pytest.mark.skipif(shutil.which("node") is None, reason="node 가 없음")
-def test_시스템_관리자_카드_넷_고른_회사_해시():
+def test_시스템_관리자_카드_다섯_고른_회사_해시():
     m = "B01_Dashboard_PermMasterWrite"
     assert _cards({"role": "SYSTEM_ADMIN", "is_master": False}, 3) == [
         ["B01_Dashboard_MasterElements", "B01_Dashboard_PermSourceRead", "m01-master-data"],
         ["B01_Dashboard_CardStructCombo", m, f"{M02}?open=구조물조합&root=master&company=3"],
         ["B01_Dashboard_CardStructOption", m, f"{M02}?open=옵션&root=master&company=3"],
         ["B01_Dashboard_CardDrawing", m, f"{M02}?open=도면&root=master&company=3"],
+        CALC_SITES,
     ]
     # 회사가 없으면 해시에 안 실음
     assert _cards({"role": "SYSTEM_ADMIN", "is_master": False})[1][2] == (
@@ -229,6 +233,7 @@ def test_구조물_조합_기본_층_개인():
         ["B01_Dashboard_CardStructCombo", m, f"{combo}&company=3"],
         ["B01_Dashboard_CardStructOption", m, f"{M02}?open=옵션&root=master&company=3"],
         ["B01_Dashboard_CardDrawing", m, f"{M02}?open=도면&root=master&company=3"],
+        CALC_SITES,
     ]
     assert _cards({"role": "ADMIN", "is_master": False, "company_id": 1}) == [
         ["B01_Dashboard_CardStructCombo", WRITE_CO, combo],
diff --git a/ui_template/ui_template_locale_m1.ts b/ui_template/ui_template_locale_m1.ts
index 6f6e4c761..8c93a946c 100644
--- a/ui_template/ui_template_locale_m1.ts
+++ b/ui_template/ui_template_locale_m1.ts
@@ -76,4 +76,54 @@ export const ui_locales_m1 = {
   M01_GroupExchange: ["환율", "Exchange rates"],
   M01_GroupRate: ["요율", "Rates"],
   M01_GroupLogic: ["단가산출 로직", "Unit-price logic"],
+  B01_CalcSites_Title: ["계산 자리", "Calc sites"],
+  B01_CalcSites_Desc: ["조작 중 계산 = 브라우저 · 서버 고름", "Browser or server while editing"],
+  B01_CalcSites_ServerCount: ["지금 서버 {value} 줄", "{value} rows on server now"],
+  B01_CalcSites_NextOpen: [
+    "열린 B05 · B06 페이지는 다음 열기(새로고침)부터 바뀜",
+    "Open B05 · B06 pages change from the next open (reload)",
+  ],
+  B01_CalcSites_Col_Group: ["묶음", "Group"],
+  B01_CalcSites_Col_Browser: ["조작 중 브라우저 셈", "Browser while editing"],
+  B01_CalcSites_Col_Server: ["[저장] 서버 정본", "Server canon on [Save]"],
+  B01_CalcSites_Col_Why: ["까닭", "Why"],
+  B01_CalcSites_ground_sample: ["지반 표본", "Ground sampling"],
+  B01_CalcSites_corridor_mesh: ["3D 길 모형", "3D corridor mesh"],
+  B01_CalcSites_quantity: ["토량 · 구조물 셈", "Earthwork · structure calc"],
+  B01_CalcSites_carry: ["이월 · 다시 얹기", "Carry · rebase"],
+  B01_CalcSites_stages: [
+    "노선 · 측점 · 종단 · 따라감 · 횡단 단계",
+    "Route · station · profile · follow · cross stages",
+  ],
+  B01_CalcSites_structure_pair: ["구조물 짝", "Structure pairs"],
+  B01_CalcSites_fixed_server: ["고정 서버", "Fixed server"],
+  B01_CalcSites_fixed_browser: ["고정 브라우저", "Fixed browser"],
+  B01_CalcSites_Why_ground_sample: [
+    "끄면 격자 대신 서버 표본(조작마다 왕복)",
+    "Off = server sampling instead of the grid (round trip per edit)",
+  ],
+  B01_CalcSites_Why_corridor_mesh: [
+    "끄면 미리보기 안 지음 · [저장] · [확정] 때 서버가 지은 모형만",
+    "Off = no preview · only the model the server built on [Save] · [Confirm]",
+  ],
+  B01_CalcSites_Why_later: ["서버 계산 창구 뒤(2단계)", "After the server calc endpoint (step 2)"],
+  B01_CalcSites_Why_pair_later: [
+    "파이썬 짝 섞임 · 짝 모으기(472-4) 뒤",
+    "Mixed Python pairs · after pair merge (472-4)",
+  ],
+  B01_CalcSites_Why_pair: [
+    "파이썬 정본 짝 유지 · TS 는 미리보기",
+    "Python canon pair · TS = preview",
+  ],
+  B01_CalcSites_Why_server: [
+    "서버 단독(GIS · 래스터 · 값어치)",
+    "Server only (GIS · raster · value)",
+  ],
+  B01_CalcSites_Why_browser: [
+    "입력 도구 · 그림 — 서버 셈 없음",
+    "Input tools · drawing — no server calc",
+  ],
+  B01_CalcSites_Saved: ["계산 자리 저장함", "Calc sites saved"],
+  B01_CalcSites_Leave: ["저장 안 한 계산 자리가 있음", "You have unsaved calc sites"],
+  B01_CalcSites_LoadFailed: ["계산 자리를 못 읽음", "Failed to load calc sites"],
 } as const;