diff --git a/A00_Common/design/design_view_profile_sections.ts b/A00_Common/design/design_view_profile_sections.ts
index 7dbb41b62..651fabd86 100644
--- a/A00_Common/design/design_view_profile_sections.ts
+++ b/A00_Common/design/design_view_profile_sections.ts
@@ -136,6 +136,14 @@ export function createProfileSections(deps: ProfileSectionsDeps) {
         migratedRoutes.add(migrateKey);
         void migrateLegacyStations(projectId, routeId)
           .then((result) => {
+            const etc = result.legacy_etc ?? [];
+            if (etc.length)
+              showToast(
+                `옛 측점 이관이 만든 「기타 구조물」 ${etc.length}곳(${etc.map((m) => `${m}m`).join(" · ")}) — ` +
+                  "측점 없는 구조물입니다. 필요 없으면 구조물 목록에서 지우세요.",
+                "warning",
+                8000,
+              );
             if (result.migrated > 0) {
               showToast(`구 구조물 측점 ${result.migrated}건을 구조물 목록으로 옮겼습니다.`);
               return deps
diff --git a/B05_Profile/B05_Profile_Api_Structures.ts b/B05_Profile/B05_Profile_Api_Structures.ts
index febb3397e..5e2b4f362 100644
--- a/B05_Profile/B05_Profile_Api_Structures.ts
+++ b/B05_Profile/B05_Profile_Api_Structures.ts
@@ -329,7 +329,13 @@ export async function saveStructures(
 export async function migrateLegacyStations(
   projectId: string,
   routeId: number,
-): Promise<{ status: string; migrated: number; revision: number }> {
+): Promise<{
+  status: string;
+  migrated: number;
+  revision: number;
+  /** 옛 이관이 만든 「기타 구조물」 누가거리(지우지 않음 · 알림만 · 280-3). */
+  legacy_etc?: number[];
+}> {
   return requestJson(`/projects/${projectId}/route/structures/migrate`, {
     method: "POST",
     body: JSON.stringify({ route_id: routeId }),
diff --git a/B05_Profile/B05_Profile_Structures_Migration.py b/B05_Profile/B05_Profile_Structures_Migration.py
index b4703ddc2..97c433a55 100644
--- a/B05_Profile/B05_Profile_Structures_Migration.py
+++ b/B05_Profile/B05_Profile_Structures_Migration.py
@@ -65,7 +65,9 @@ def _is_managed_elsewhere(entry: dict[str, Any], planted: Sequence[float]) -> bo
     label = str(entry.get("structure", "")).strip()
     at = float(entry.get("chainage_m", 0.0))
     return (
-        entry.get("origin") == "pipe"
+        # 이름 빈 측점 = 추가 측점 정본(`plus_stations.json`) 소관 — 「기타」로 안 옮김(280-3)
+        not label
+        or entry.get("origin") == "pipe"
         or entry.get("structureType") == PIPE_STRUCTURE_NAME
         or label == PIPE_STRUCTURE_NAME
         or label in {item.name for item in structure_type_map().values()}
diff --git a/B05_Profile/B05_Profile_Structures_Router.py b/B05_Profile/B05_Profile_Structures_Router.py
index f639d071b..020a16d9d 100644
--- a/B05_Profile/B05_Profile_Structures_Router.py
+++ b/B05_Profile/B05_Profile_Structures_Router.py
@@ -49,7 +49,7 @@ from common_util.common_util_route_follow import (
     route_outside,
 )
 from common_util.common_util_storage import resolve_stored_project_path
-from common_util.common_util_structure_station import plan_stations
+from common_util.common_util_structure_station import SAME_STATION_M, plan_stations
 from config.config_db import get_db_pool
 from M02_MasterTemplete.StructOptions.M02_SO_Options import TypesWithVisible, with_visible
 
@@ -266,9 +266,10 @@ class StructureMigrateRequest(BaseModel):
 
 async def _saved_irregular_stations(
     project_id: UUID, root: str, route_id: int | None
-) -> list[dict[str, Any]]:
-    """저장 종단 정본의 비정규 측점 `{chainage_m, structure}` — 이관 원천. 화면 상세는 초안
-    (옮긴 관 자리)이 섞일 수 있어 안 받음(452 · [저장] 없이 초안을 정본에 쓰지 않음)."""
+) -> tuple[list[dict[str, Any]], list[float]]:
+    """저장 종단 정본의 비정규 측점 `{chainage_m, structure}` — 이관 원천 · 서 있는 구조물 측점
+    누가거리(비정규 · 이름 단 격자 · 낡음 판정 280-3). 화면 상세는 초안(옮긴 관 자리)이 섞일 수
+    있어 안 받음(452 · [저장] 없이 초안을 정본에 쓰지 않음)."""
     from B06_Section.B06_Section_Repository import get_longitudinal_section
     from B06_Section.B06_Section_Router_Design import resolve_longitudinal_path
 
@@ -283,21 +284,37 @@ async def _saved_irregular_stations(
             else None
         )
     if not row or not row.get("longitudinal_file_path"):
-        return []
+        return [], []
     try:
         path = resolve_longitudinal_path(Path(root), str(row["longitudinal_file_path"]))
         stations = json.loads(path.read_text(encoding="utf-8")).get("stations") or []
     except (OSError, ValueError, AttributeError):
-        return []
-    return [
+        return [], []
+    stations = [station for station in stations if station.get("chainage_m") is not None]
+    legacy = [
         {"chainage_m": station["chainage_m"], "structure": station.get("structure") or ""}
         for station in stations
-        if station.get("kind") == "irregular" and station.get("chainage_m") is not None
+        if station.get("kind") == "irregular"
     ]
+    standing = [
+        float(station["chainage_m"])
+        for station in stations
+        if station.get("kind") == "irregular" or station.get("structure")
+    ]
+    return legacy, standing
 
 
 @router.post("/{project_id}/route/structures/migrate", response_model=None)
 async def migrate_structures(project_id: UUID, payload: StructureMigrateRequest) -> JSONResponse:
+    """구 비정규 측점 이관 — [저장]과 같은 프로젝트 잠금 안(280-3 · 다른 탭 저장 도중 낡은 종단으로
+    옮기지 않음 · 몸통 `_migrate_structures`)."""
+    from common_util import common_util_save_guard as guard
+
+    async with guard.project_lock(str(project_id)):
+        return await _migrate_structures(project_id, payload)
+
+
+async def _migrate_structures(project_id: UUID, payload: StructureMigrateRequest) -> JSONResponse:
     """구 비정규 측점(자유 텍스트)을 구조물 정본으로 옮긴다. 멱등 — 이미 정본에 있는
     (타입, 위치)는 건너뛰고, 배관은 관 지점 정본 소관이라 옮기지 않는다
     (2026-08-17 컨테이너 병합 3단계, 매핑은 `B05_Profile_Structures_Migration` 정의)."""
@@ -320,15 +337,38 @@ async def migrate_structures(project_id: UUID, payload: StructureMigrateRequest)
                 plus_chainages(root),
             )
         ]
-        legacy = await _saved_irregular_stations(project_id, root, payload.route_id)
-        plan = migrate_irregular_stations(legacy, planted)
+        legacy, standing = await _saved_irregular_stations(project_id, root, payload.route_id)
+
         # 표식 = "타입@위치". 원천(종단 정본의 비정규 측점)은 원복용으로 그대로 두고,
         # 옮긴 이력만 남긴다 — 그래야 사용자가 지운 구조물이 재진입 때 되살아나지 않는다
         # (2026-08-24 사용자: 초기 계산값은 원복용, 사용자 수정 1세트가 최종본).
-
         def key_of(item: StructureInstance) -> str:
             return f"{item.type_id}@{round(item.anchor_m(), 3)}"
 
+        # 옛 이관이 만든 「기타 구조물」(이름 없는 측점 · 메모 없음) — 지우지 않고 알림만(280-3)
+        legacy_etc = [
+            round(item.anchor_m(), 3)
+            for item in existing
+            if item.type_id == "etc"
+            and key_of(item) in migrated_before
+            and str(item.options.get("name") or "기타 구조물") == "기타 구조물"
+            and not item.memo
+        ]
+        # 종단 정본이 지금 심는 자리를 다 못 세움 = 낡음(저장 도중 끊김 · 다른 탭 [저장] 도중) —
+        # 낡은 측점을 「기타」로 옮기지 않음(280-3)
+        if any(all(abs(at - s) >= SAME_STATION_M for s in standing) for at in planted):
+            return JSONResponse(
+                content={
+                    "status": "success",
+                    "migrated": 0,
+                    "revision": revision,
+                    "pipe_facilities": 0,
+                    "skipped": "stale_longitudinal",
+                    "legacy_etc": legacy_etc,
+                }
+            )
+        plan = migrate_irregular_stations(legacy, planted)
+
         occupied = {key_of(item) for item in existing}
         fresh = [
             item
@@ -360,6 +400,7 @@ async def migrate_structures(project_id: UUID, payload: StructureMigrateRequest)
                     "migrated": moved_pipes,
                     "revision": revision,
                     "pipe_facilities": moved_pipes,
+                    "legacy_etc": legacy_etc,
                 }
             )
         new_revision = save_structures(
@@ -381,6 +422,7 @@ async def migrate_structures(project_id: UUID, payload: StructureMigrateRequest)
                 "migrated": len(fresh) + moved_pipes,
                 "revision": new_revision,
                 "pipe_facilities": moved_pipes,
+                "legacy_etc": legacy_etc,
             }
         )
     except LookupError:
diff --git a/B06_Section/B06_Section_Router_Stations.py b/B06_Section/B06_Section_Router_Stations.py
index a72d0eee1..f3da5105a 100644
--- a/B06_Section/B06_Section_Router_Stations.py
+++ b/B06_Section/B06_Section_Router_Stations.py
@@ -296,13 +296,19 @@ async def _regenerate_structure_stations(
     return made
 
 
+class StationsUnsynced(RuntimeError):
+    """맞출 구조물 측점이 있는데 샘플링 조건이 없음 — 저장은 그대로 · 부른 쪽이 「맞춤 실패」
+    알림(280-3)."""
+
+
 async def ensure_structure_stations(project_id: UUID) -> int:
     """빠진 구조물 측점을 세우고 낡은 것을 지운다 — 횡단 저장마다 부름(맞출 것이 있을 때만 돎).
     곡선 측점이 지금 관 · 구조물과 어긋나도 맞춤(407-3 · [저장] 의 관 · 구조물 차례 뒤).
 
     옮긴 관 · 구조물 측점은 B05 확정 전이면 종단 측점 · 횡단 파일 · DB 행이 없어, 그 자리
     횡단 수정이 받을 곳 없이 버려진다. [측점 만들기] 단추와 같은 조건으로 세운다.
-    만들 수 없으면(노선 · 샘플링 조건 없음 · 빠진 것 없음) 0 — 저장을 막지 않는다.
+    노선이 없거나 맞출 것이 없으면 0 · 맞출 것이 있는데 샘플링 조건이 없으면 `StationsUnsynced`
+    (부른 쪽이 저장은 그대로 두고 응답 `stations_synced` 거짓 · 280-3).
     """
     paths = await _project_paths(project_id)
     if paths is None:
@@ -326,10 +332,9 @@ async def ensure_structure_stations(project_id: UUID) -> int:
         return 0
     snapshot = await _sampling_conditions(project_id, project_root)
     if snapshot is None:
-        logger.warning(
-            "B06 저장: 구조물 측점 %d곳을 못 맞춤 — 샘플링 조건 없음", len(missing) or stale
+        raise StationsUnsynced(
+            f"구조물 측점 {len(missing) or stale}곳을 못 맞춤 — 샘플링 조건 없음"
         )
-        return 0
     await _regenerate_structure_stations(project_id, project_root, route, snapshot)
     return len(missing) or stale
 
@@ -447,14 +452,23 @@ async def put_plus_stations(project_id: UUID, request: PlusStationsRequest) -> J
             return save_plus_stations(project_root, chainages, xy)
 
         saved = await asyncio.to_thread(_save)
-        await ensure_structure_stations(project_id)
+        synced = True
+        try:
+            await ensure_structure_stations(project_id)
+        except StationsUnsynced:
+            logger.warning(
+                "B06 추가 측점: 측점 맞춤 실패(저장은 그대로): project_id=%s", project_id
+            )
+            synced = False
     except Exception:
         logger.exception("B06 추가 측점 저장 실패: project_id=%s", project_id)
         return JSONResponse(
             status_code=500,
             content={"status": "error", "message": "추가 측점을 저장하지 못했습니다."},
         )
-    return JSONResponse(content={"status": "success", "chainages": saved})
+    return JSONResponse(
+        content={"status": "success", "chainages": saved, "stations_synced": synced}
+    )
 
 
 #: 한 번에 미리 뜨는 자리 수 상한 — 화면 초안 한 벌이면 충분 · 큰 요청으로 서버를 붙잡지 않게.
diff --git a/B06_Section/B06_Section_Section_Store.ts b/B06_Section/B06_Section_Section_Store.ts
index c1b91e2d1..4fdce6dd3 100644
--- a/B06_Section/B06_Section_Section_Store.ts
+++ b/B06_Section/B06_Section_Section_Store.ts
@@ -93,7 +93,7 @@ async function withDraftWalls(
   await loadSavedPlusStations(projectId);
   // 노선 초안 동안 틀(280-3) — 저장 정본 · 초안 전 상세 = 옛 노선 틀 · 그 밖 = 묶음이 갈아끼운 새 노선 틀
   const frame =
-    useDesignStore(projectId, null).get("routeDraft") === null
+    readState("route-draft", projectId) === null // 가게 `routeDraft` 칸(세션)
       ? null
       : detail === savedSectionDetail(projectId, routeId) ||
           detail === heldSectionDetail(projectId, routeId)
diff --git a/B07_DesignDetail/B07_DesignDetail_UI_Settings.ts b/B07_DesignDetail/B07_DesignDetail_UI_Settings.ts
index adc8dc874..c33e455d8 100644
--- a/B07_DesignDetail/B07_DesignDetail_UI_Settings.ts
+++ b/B07_DesignDetail/B07_DesignDetail_UI_Settings.ts
@@ -4,7 +4,7 @@
  *
  *   평면도 = 평면도 관리 모달 그대로(`openPlanManager`)
  *   횡단도 = 장 배치(열 · 행 · [이 장] · [모든 장]) · 표 배율 · [안내선 숨기기] — 좌측 카드 밑에서 옮김
- *   구조물 도면 = 「M02 그림 — 축척 없음」 한 줄 · 종단 · 토적 · 전개도 = 몸 비움(축척 칸은 485-2)
+ *   구조물 도면 = 「M02 그림 — 축척 없음」 한 줄 · 종단 · 횡단 · 토적 · 전개도 = X · Y 축척 칸(`_UI_Settings_Scale`)
  *   [원본에서 다시 그리기] = 지금 연 도면이 그 묶음일 때만 켬
  * ========================================================================== */
 
@@ -17,6 +17,7 @@ import {
   isCrossSheet,
 } from "./B07_DesignDetail_UI_Panels";
 import { openPlanManager, type PlanManageControls } from "./B07_DesignDetail_UI_PlanManage";
+import { mountDrawingScale } from "./B07_DesignDetail_UI_Settings_Scale";
 
 type Kind = DesignDrawingItem["kind"];
 
@@ -81,6 +82,7 @@ export function openDrawingSettings(kind: Kind, deps: DrawingSettingsDeps): void
       closeModal = close;
       if (mine) body.append(note(`지금 도면: ${current?.label}`));
       if (kind === "structure") body.append(note("M02 그림 — 축척 없음"));
+      mountDrawingScale(body, kind, deps, close);
       if (kind === "cross") mountCross(body, deps, close);
     },
   });
diff --git a/B07_DesignDetail/B07_DesignDetail_UI_Settings_Scale.ts b/B07_DesignDetail/B07_DesignDetail_UI_Settings_Scale.ts
new file mode 100644
index 000000000..28352bd08
--- /dev/null
+++ b/B07_DesignDetail/B07_DesignDetail_UI_Settings_Scale.ts
@@ -0,0 +1,157 @@
+/* =============================================================================
+ * B07_DesignDetail_UI_Settings_Scale.ts
+ * ⚙ 모달 X · Y 축척 칸(485-2 · 요구 280-5) — 종단 · 횡단 · 토적 · 전개도만.
+ *
+ *   칸 = 분모 정수 · 범위 밖 = 칸 붉게 + [축척 저장] 꺼짐 · 기본이 자동인 칸(토적 X · 전개도) = 「자동」
+ *   [축척 저장] = 그 종류 저장본이 있으면 n 장 물음(취소 = 그대로) → PUT → 화면 다시 세움(도면 다시 그림)
+ *   [기본값] = 칸만 기본으로 채움 — 저장은 [축척 저장]
+ * ========================================================================== */
+
+import { createCheckbox } from "@ui/ui_template_checkbox";
+import {
+  createButton,
+  createInputField,
+  hideLoadingOverlay,
+  showConfirmDialog,
+  showLoadingOverlay,
+  showToast,
+} from "@ui/ui_template_elements";
+import {
+  type DrawingScaleAxes,
+  type DrawingScaleKind,
+  type DrawingScales,
+  fetchDrawingScales,
+  saveDrawingScales,
+} from "./B07_DesignDetail_Api_Fetch";
+import type { DrawingSettingsDeps } from "./B07_DesignDetail_UI_Settings";
+import { readScaleAxis, scaleToSend } from "./logic/B07_DesignDetail_Scale_Check";
+
+const LABEL: Record<DrawingScaleKind, string> = {
+  longitudinal: "종단도",
+  cross: "횡단도",
+  mass_haul: "토적도",
+  development: "전개도",
+};
+const AXES = [
+  ["x", "X(가로) 1/"],
+  ["y", "Y(세로) 1/"],
+] as const;
+
+const isScaleKind = (kind: string): kind is DrawingScaleKind => kind in LABEL;
+
+/** ⚙ 모달 몸에 축척 칸을 붙임 — 축척 없는 종류는 아무것도 안 함. */
+export function mountDrawingScale(
+  body: HTMLElement,
+  kind: string,
+  deps: DrawingSettingsDeps,
+  close: () => void,
+): void {
+  if (!isScaleKind(kind) || !deps.plan) return;
+  const { projectId, onClosed } = deps.plan;
+  const section = document.createElement("div");
+  section.className = "b07-scale";
+  section.textContent = "축척 받는 중…";
+  body.append(section);
+  void fetchDrawingScales(projectId)
+    .then((data) => {
+      section.textContent = "";
+      buildScaleFields(section, kind, data, async (next) => {
+        const saved = data.saved[kind] ?? 0;
+        const ask = `${LABEL[kind]} 축척을 바꾸면 저장본 ${saved}장이 풀립니다(원본에서 다시 그림). 바꿀까요?`;
+        if (saved > 0 && !(await showConfirmDialog(ask, "바꿈"))) return;
+        showLoadingOverlay();
+        try {
+          await saveDrawingScales(projectId, { [kind]: next });
+          close();
+          showToast(`${LABEL[kind]} 축척을 바꿨습니다.`, "success");
+          onClosed(true, deps.current()?.id); // 목록 · 도면을 서버에서 다시 받아 다시 그림
+        } catch (error) {
+          showToast(
+            error instanceof Error ? error.message : "축척을 저장하지 못했습니다.",
+            "error",
+          );
+        } finally {
+          hideLoadingOverlay();
+        }
+      });
+    })
+    .catch(() => {
+      section.textContent = "축척을 받지 못했습니다.";
+    });
+}
+
+function buildScaleFields(
+  section: HTMLElement,
+  kind: DrawingScaleKind,
+  data: DrawingScales,
+  save: (next: DrawingScaleAxes) => Promise<void>,
+): void {
+  const fields = AXES.map(([axis, label]) => {
+    const fallback = data.defaults[kind][axis];
+    const range = data.ranges[kind][axis];
+    const [min, max] = range;
+    const field = createInputField({ label, type: "number", compact: true, min, max });
+    field.root.classList.add("b07-scale__field");
+    const auto = fallback === null ? createCheckbox("자동") : undefined;
+    if (auto) field.root.append(auto.root);
+    const set = (value: number | null): void => {
+      field.input.value = value === null ? "" : String(value);
+      if (auto) auto.input.checked = value === null;
+      field.input.disabled = value === null && !!auto;
+    };
+    set(data.scales[kind][axis]);
+    const read = () => readScaleAxis(field.input.value, !!auto?.input.checked, range);
+    return { axis, field, auto, fallback, set, read };
+  });
+
+  const saveButton = createButton({
+    label: "축척 저장",
+    onClick: () => {
+      const [x, y] = fields.map((f) => f.read()) as [number | null, number | null];
+      const now = data.scales[kind];
+      if (x === now.x && y === now.y) {
+        showToast("바뀐 축척이 없습니다.", "info");
+        return;
+      }
+      void save({ x: scaleToSend(x, fields[0].fallback), y: scaleToSend(y, fields[1].fallback) });
+    },
+  });
+  const check = (): void => {
+    let bad = false;
+    for (const f of fields) {
+      const result = f.read();
+      f.field.setError(typeof result === "string" ? result : undefined);
+      bad ||= typeof result === "string";
+    }
+    saveButton.disabled = bad;
+  };
+  for (const f of fields) {
+    f.field.input.addEventListener("input", check);
+    f.auto?.input.addEventListener("change", () => {
+      if (f.auto!.input.checked) f.set(null);
+      else f.field.input.disabled = false; // 빈 칸 — 숫자를 적어야 저장
+      check();
+    });
+  }
+  const reset = createButton({
+    label: "기본값",
+    variant: "ghost",
+    onClick: () => {
+      fields.forEach((f) => f.set(f.fallback));
+      check();
+    },
+  });
+  reset.title = "칸을 기본 축척으로 채움 — [축척 저장]으로 씀";
+
+  const title = document.createElement("p");
+  title.className = "b07-settings__note";
+  title.textContent =
+    kind === "cross" ? "축척 — 횡단도 장(표준 횡단면도 뺌)" : `축척 — ${LABEL[kind]}`;
+  const row = document.createElement("div");
+  row.className = "b07-scale__row";
+  row.append(...fields.map((f) => f.field.root));
+  const buttons = document.createElement("div");
+  buttons.className = "b07-scale__actions";
+  buttons.append(reset, saveButton);
+  section.append(title, row, buttons);
+}
diff --git a/B07_DesignDetail/B07_DesignDetail_UI_Style.css b/B07_DesignDetail/B07_DesignDetail_UI_Style.css
index bd92bbb2c..7ac6e74ca 100644
--- a/B07_DesignDetail/B07_DesignDetail_UI_Style.css
+++ b/B07_DesignDetail/B07_DesignDetail_UI_Style.css
@@ -503,3 +503,27 @@ html.is-bm-route .b07-cad-stack > .cad-tabs {
   gap: var(--spacing-8);
   min-width: 280px;
 }
+
+/* ⚙ 축척 칸(485-2) — X · Y 두 칸 한 줄 · 단추 오른쪽 */
+.b07-scale {
+  display: flex;
+  flex-direction: column;
+  gap: var(--spacing-8);
+  min-width: 280px;
+  margin-bottom: var(--spacing-8);
+}
+
+.b07-scale__row {
+  display: flex;
+  gap: var(--spacing-8);
+}
+
+.b07-scale__field {
+  flex: 1;
+}
+
+.b07-scale__actions {
+  display: flex;
+  justify-content: flex-end;
+  gap: var(--spacing-8);
+}
diff --git a/B07_DesignDetail/logic/B07_DesignDetail_Scale_Check.ts b/B07_DesignDetail/logic/B07_DesignDetail_Scale_Check.ts
new file mode 100644
index 000000000..7c3b2c307
--- /dev/null
+++ b/B07_DesignDetail/logic/B07_DesignDetail_Scale_Check.ts
@@ -0,0 +1,24 @@
+/* =============================================================================
+ * B07_DesignDetail_Scale_Check.ts
+ * ⚙ 축척 칸(485-2) 판정 — 칸 글 → 분모(정수 · 범위 안) · 자동 = null · 틀리면 까닭 글.
+ * 서버 `checked_scales`(`_Router_Support_Scale.py`)와 같은 규칙 — 범위는 서버가 내려 줌.
+ * ========================================================================== */
+
+/** 칸 하나 읽기 — 숫자 · null(자동) · 까닭 글(틀림). */
+export function readScaleAxis(
+  raw: string,
+  auto: boolean,
+  [low, high]: [number, number],
+): number | null | string {
+  if (auto) return null;
+  const text = raw.trim().replace(/,/g, "");
+  const value = Number(text);
+  if (text === "" || !Number.isInteger(value) || value < low || value > high) {
+    return `1/${low.toLocaleString()}~1/${high.toLocaleString()} 사이 정수`;
+  }
+  return value;
+}
+
+/** 보낼 값 — 기본값과 같으면 null(파일엔 기본 그대로 남김). */
+export const scaleToSend = (value: number | null, fallback: number | null): number | null =>
+  value === fallback ? null : value;
diff --git a/resources/tester/helper_280_5_b07_settings.cjs b/resources/tester/helper_280_5_b07_settings.cjs
index 179a6018e..be4ebe47d 100644
--- a/resources/tester/helper_280_5_b07_settings.cjs
+++ b/resources/tester/helper_280_5_b07_settings.cjs
@@ -96,6 +96,27 @@ const modals = [];
 const plans = [];
 const calls = [];
 let failConfirm = false;
+const SCALES = {
+  scales: {
+    longitudinal: { x: 1000, y: 200 },
+    cross: { x: 100, y: 100 },
+    mass_haul: { x: null, y: 50000 },
+    development: { x: null, y: null },
+  },
+  defaults: {
+    longitudinal: { x: 1000, y: 200 },
+    cross: { x: 100, y: 100 },
+    mass_haul: { x: null, y: 50000 },
+    development: { x: null, y: null },
+  },
+  ranges: {
+    longitudinal: { x: [100, 10000], y: [10, 2000] },
+    cross: { x: [10, 1000], y: [10, 1000] },
+    mass_haul: { x: [100, 20000], y: [1000, 1000000] },
+    development: { x: [10, 10000], y: [10, 10000] },
+  },
+  saved: { longitudinal: 2, cross: 0, mass_haul: 0, development: 0 },
+};
 let answer = true;
 
 const button = (opts) => {
@@ -118,13 +139,24 @@ const STUBS = {
       label.className = "ui-field__label";
       label.textContent = opts.label;
       root.append(label, input);
-      return { root, input };
+      const setError = (msg) => (input.error = msg ?? null);
+      return { root, input, setError };
     },
     showToast: (message, kind) => toasts.push([kind, message]),
     showLoadingOverlay: () => calls.push(["overlay+"]),
     hideLoadingOverlay: () => calls.push(["overlay-"]),
     showConfirmDialog: async (message) => (calls.push(["ask", message]), answer),
   },
+  "@ui/ui_template_checkbox": {
+    createCheckbox: (text) => {
+      const root = new FakeNode("label");
+      root.className = "ui-checkbox";
+      const input = new FakeNode("input");
+      input.checked = false;
+      root.append(input);
+      return { root, input };
+    },
+  },
   "@ui/ui_template_modal": {
     openModal: (opts) => {
       const body = new FakeNode("div");
@@ -152,6 +184,9 @@ const STUBS = {
       return { all_confirmed: true };
     },
     invalidateDesignDrawing: async (projectId, id) => calls.push(["invalidate", id]),
+    // 485-2 축척 — 범위 · 기본은 서버(`_Router_Support_Scale.py`)와 같은 값
+    fetchDrawingScales: async () => JSON.parse(JSON.stringify(SCALES)),
+    saveDrawingScales: async (projectId, scales) => calls.push(["scales", scales]),
   },
 };
 
@@ -274,12 +309,14 @@ const drawings = [
   openDrawingSettings("cross", deps);
   await new Promise((r) => setTimeout(r, 0));
   const cross = modals.at(-1);
-  const crossInputs = all(cross.body).filter((n) => n.tagName === "INPUT");
+  const layoutNode = byClass(cross.body, "b07-cross-layout")[0];
+  const crossInputs = all(layoutNode).filter((n) => n.tagName === "INPUT");
   out.crossModal = {
     title: cross.opts.title,
-    labels: byClass(cross.body, "ui-field__label").map((n) => n.textContent),
+    labels: byClass(layoutNode, "ui-field__label").map((n) => n.textContent),
     values: crossInputs.map((n) => n.value),
-    buttons: all(cross.body)
+    scaleTitle: texts(byClass(cross.body, "b07-scale")[0])[0],
+    buttons: all(layoutNode)
       .filter((n) => n.tagName === "BUTTON")
       .map((n) => [n.textContent, n.disabled]),
     guideLast: byClass(cross.body, "b07-cross-layout")[0].children.at(-1) === guideToggle,
@@ -287,7 +324,7 @@ const drawings = [
     notes: texts(cross.body).filter((t) => t.startsWith("지금 도면")),
   };
   crossInputs[0].value = "2";
-  all(cross.body)
+  all(layoutNode)
     .find((n) => n.textContent === "이 장")
     .click();
   out.crossSave = { saved, closed: !cross.open };
@@ -318,6 +355,115 @@ const drawings = [
   openDrawingSettings("cross", deps);
   out.standardInCross = !modals.at(-1).opts.actions[0].disabled;
 
+  // ── 축척 칸(485-2) ─────────────────────────────────────────────────────
+  const closedCalls = [];
+  const scaleDeps = { ...deps, plan: { projectId: "p1", onClosed: (...a) => closedCalls.push(a) } };
+  const tick = () => new Promise((r) => setTimeout(r, 0));
+  const scaleOf = async (kind) => {
+    openDrawingSettings(kind, scaleDeps);
+    await tick();
+    const modal = modals.at(-1);
+    const section = byClass(modal.body, "b07-scale")[0];
+    const inputs = all(section).filter(
+      (n) => n.tagName === "INPUT" && !n.parent.classList.contains("ui-checkbox"),
+    );
+    const autos = byClass(section, "ui-checkbox").map((n) => n.children[0]);
+    const btn = (label) =>
+      all(section).find((n) => n.tagName === "BUTTON" && n.textContent === label);
+    const type = (input, value) => {
+      input.value = value;
+      input.listeners.input.forEach((h) => h());
+    };
+    const toggle = (box) => {
+      box.checked = !box.checked;
+      box.listeners.change.forEach((h) => h());
+    };
+    const state = () => ({
+      values: inputs.map((n) => n.value),
+      errors: inputs.map((n) => n.error ?? null),
+      disabled: inputs.map((n) => !!n.disabled),
+      autos: autos.map((n) => n.checked),
+      save: !btn("축척 저장").disabled,
+    });
+    return { modal, section, inputs, autos, btn, type, toggle, state };
+  };
+  const scale = {};
+  current = drawings[2]; // longitudinal
+  let s = await scaleOf("longitudinal");
+  scale.longLabels = byClass(s.section, "ui-field__label").map((n) => n.textContent);
+  scale.longStart = s.state();
+  s.type(s.inputs[0], "50");
+  scale.longLow = s.state();
+  s.type(s.inputs[0], "500.5");
+  scale.longFrac = s.state();
+  s.type(s.inputs[0], "500");
+  scale.longOk = s.state();
+  calls.length = 0;
+  answer = false;
+  s.btn("축척 저장").click();
+  await tick();
+  scale.cancel = { calls: calls.map((c) => c[0]), open: s.modal.open, closed: closedCalls.length };
+  answer = true;
+  calls.length = 0;
+  s.btn("축척 저장").click();
+  await tick();
+  await tick();
+  scale.save = {
+    ask: calls.find((c) => c[0] === "ask")?.[1],
+    sent: calls.find((c) => c[0] === "scales")?.[1],
+    open: s.modal.open,
+    closed: [...closedCalls],
+  };
+  s = await scaleOf("longitudinal");
+  s.type(s.inputs[1], "300");
+  s.btn("기본값").click();
+  scale.reset = s.state();
+  calls.length = 0;
+  const toastAt = toasts.length;
+  s.btn("축척 저장").click();
+  await tick();
+  scale.same = { calls: calls.length, toasts: toasts.slice(toastAt).map((t) => t[1]) };
+
+  s = await scaleOf("mass_haul");
+  scale.massStart = s.state();
+  s.toggle(s.autos[0]);
+  scale.massManual = s.state();
+  s.type(s.inputs[0], "2000");
+  scale.massTyped = s.state();
+  calls.length = 0;
+  s.btn("축척 저장").click();
+  await tick();
+  await tick();
+  scale.massSent = {
+    ask: calls.filter((c) => c[0] === "ask").length,
+    sent: calls.find((c) => c[0] === "scales")?.[1],
+  };
+  s = await scaleOf("mass_haul");
+  s.toggle(s.autos[0]);
+  s.toggle(s.autos[0]);
+  scale.massBack = s.state();
+
+  s = await scaleOf("development");
+  scale.dev = s.state();
+  openDrawingSettings("structure", scaleDeps);
+  scale.structure = byClass(modals.at(-1).body, "b07-scale").length;
+  out.scale = scale;
+  const Check = loadTs(path.join(B07, "logic", "B07_DesignDetail_Scale_Check.ts"));
+  out.readAxis = [
+    ["1,000", false],
+    [" 99 ", false],
+    ["10001", false],
+    ["12.5", false],
+    ["", false],
+    ["abc", false],
+    ["", true],
+  ].map(([raw, auto]) => Check.readScaleAxis(raw, auto, [100, 10000]));
+  out.toSend = [
+    Check.scaleToSend(200, 200),
+    Check.scaleToSend(500, 200),
+    Check.scaleToSend(null, null),
+  ];
+
   // ── 저장 묶음 ────────────────────────────────────────────────────────────
   const tabsOf = (list, activeId) => ({
     tabs: () => list,
diff --git a/resources/tester/test_280_3_migrate_guard.py b/resources/tester/test_280_3_migrate_guard.py
new file mode 100644
index 000000000..9c2682d15
--- /dev/null
+++ b/resources/tester/test_280_3_migrate_guard.py
@@ -0,0 +1,175 @@
+# -*- coding: utf-8 -*-
+"""요구 280-3 서버 — 옛 비정규 측점 이관 막이 · 이미 생긴 「기타 구조물」 알림 · 맞춤 실패 알림.
+
+못박는 것(임시 폴더 · 공유 storage 안 씀)
+  - 이름 빈 측점(추가 측점 정본 소관) = 이관 0 — 「기타 구조물」로 안 옮김.
+  - 종단 정본이 지금 심는 자리를 다 못 세움(저장 도중 끊김 · 다른 탭 [저장] 도중) = 이관 0.
+  - 정본 맞는 옛 자유 글(「대피로 2.0m」)은 종전대로 옮김.
+  - 옛 이관이 만든 「기타 구조물」(이관 기록 · 이름 그대로 · 메모 없음) = `legacy_etc` · 안 지움.
+  - 이관 = [저장]과 같은 프로젝트 잠금 안(앞 저장이 끝날 때까지 기다림).
+  - 맞출 측점이 있는데 샘플링 조건 없음 = `StationsUnsynced` · 추가 측점 PUT `stations_synced` 거짓.
+판 = `test_452_server_keys_prune_migrate.migrate_client`.
+"""
+
+import asyncio
+import json
+import sys
+from pathlib import Path
+from uuid import UUID
+
+import pytest
+
+HERE = Path(__file__).resolve().parent
+ROOT = HERE.parents[1]
+if str(ROOT) not in sys.path:
+    sys.path.insert(0, str(ROOT))
+
+import test_452_server_keys_prune_migrate as base  # noqa: E402
+
+import B06_Section.B06_Section_Router_Stations as stations  # noqa: E402
+from common_util import common_util_save_guard as guard  # noqa: E402
+from common_util.common_util_drainage_pipes import pipe_points_path_in  # noqa: E402
+
+PROJECT_ID = base.PROJECT_ID
+migrate_client = base.migrate_client  # 판 그대로
+router_module = base.router_module
+_write_longitudinal = base._write_longitudinal
+
+URL = f"/api/projects/{PROJECT_ID}/route/structures/migrate"
+STRUCTURES = Path("B05_Profile") / "route" / "structures.json"
+
+
+def _pipe(project: Path, chainage: float) -> None:
+    path = pipe_points_path_in(project)
+    path.parent.mkdir(parents=True, exist_ok=True)
+    path.write_text(
+        json.dumps({"route_signature": "s", "points": [{"chainage_m": chainage, "id": "p1"}]}),
+        encoding="utf-8",
+    )
+
+
+def _line(*irregular: tuple[float, str]) -> list[dict]:
+    return [
+        {"chainage_m": 0.0, "kind": "bp"},
+        *({"chainage_m": at, "kind": "irregular", "structure": name} for at, name in irregular),
+        {"chainage_m": 400.0, "kind": "ep"},
+    ]
+
+
+def test_이름_빈_측점은_이관_안_함(migrate_client):
+    client, project = migrate_client
+    _write_longitudinal(project, _line((376.0, "")))
+    response = client.post(URL, json={"route_id": None})
+    assert response.status_code == 200, response.text
+    assert response.json()["migrated"] == 0
+    stored = client.get(f"/api/projects/{PROJECT_ID}/route/structures").json()["structures"]
+    assert stored == []
+
+
+def test_낡은_종단은_이관_안_함(migrate_client):
+    client, project = migrate_client
+    _pipe(project, 351.0)  # 지금 관 = 351 · 종단은 옛 자리 330 만(저장 도중 끊김)
+    _write_longitudinal(project, _line((330.0, "파형강관 D800"), (600.0, "맹암거(구판)")))
+    body = client.post(URL, json={"route_id": None}).json()
+    assert body["migrated"] == 0 and body["skipped"] == "stale_longitudinal"
+    assert not (project / STRUCTURES).exists()
+
+
+def test_정본_맞는_옛_자유글은_옮김(migrate_client):
+    client, project = migrate_client
+    _pipe(project, 351.0)
+    _write_longitudinal(project, _line((300.0, "대피로 2.0m"), (351.0, "파형강관 D800")))
+    body = client.post(URL, json={"route_id": None}).json()
+    assert body["migrated"] == 1 and "skipped" not in body
+    stored = client.get(f"/api/projects/{PROJECT_ID}/route/structures").json()["structures"]
+    assert [s["type_id"] for s in stored] == ["refuge"]
+
+
+def test_이미_생긴_기타_구조물은_알림만(migrate_client):
+    client, project = migrate_client
+    _write_longitudinal(project, _line((376.0, "")))
+    path = project / STRUCTURES
+    path.parent.mkdir(parents=True, exist_ok=True)
+    etc = {
+        "structure_id": "e1",
+        "type_id": "etc",
+        "placement": "point",
+        "chainage_m": 376.0,
+        "options": {"name": "기타 구조물"},
+    }
+    named = {**etc, "structure_id": "e2", "chainage_m": 200.0, "options": {"name": "돌망태"}}
+    path.write_text(
+        json.dumps(
+            {
+                "revision": 1,
+                "structures": [etc, named],
+                "migrated_legacy": ["etc@376.0", "etc@200.0"],
+            },
+            ensure_ascii=False,
+        ),
+        encoding="utf-8",
+    )
+    body = client.post(URL, json={"route_id": None}).json()
+    assert body["legacy_etc"] == [376.0]  # 이름 단 것(돌망태)은 사용자 것
+    stored = client.get(f"/api/projects/{PROJECT_ID}/route/structures").json()["structures"]
+    assert sorted(s["structure_id"] for s in stored) == ["e1", "e2"]  # 지우지 않음
+
+
+def test_이관은_저장_잠금을_기다림(monkeypatch):
+    seen: list[str] = []
+
+    async def body(project_id, payload):
+        seen.append("migrate")
+        return "done"
+
+    monkeypatch.setattr(router_module, "_migrate_structures", body)
+
+    async def run() -> None:
+        lock = guard.project_lock(PROJECT_ID)
+        async with lock:
+            task = asyncio.create_task(
+                router_module.migrate_structures(
+                    UUID(PROJECT_ID), router_module.StructureMigrateRequest()
+                )
+            )
+            await asyncio.sleep(0.05)
+            assert seen == []  # 저장 도중 = 기다림
+        assert await task == "done" and seen == ["migrate"]
+
+    asyncio.run(run())
+
+
+def test_샘플링_조건_없으면_맞춤_실패_알림(monkeypatch, tmp_path):
+    from B05_Profile import B05_Profile_Engine_Sections as sections
+    from B05_Profile import B05_Profile_Plus_Stations as plus
+    from B05_Profile import B05_Profile_Router_Confirm as confirm
+
+    async def paths(_project_id):
+        return tmp_path, {"route_data_path": ""}
+
+    async def nothing(*_args, **_kwargs):
+        return None
+
+    monkeypatch.setattr(stations, "_project_paths", paths)
+    monkeypatch.setattr(stations, "_missing_marks", lambda *_: [120.0])
+    monkeypatch.setattr(stations, "_stale_marks", lambda *_: 0)
+    monkeypatch.setattr(stations, "_curve_marks", lambda *_: 0)
+    monkeypatch.setattr(stations, "run_with_connection", nothing)
+    monkeypatch.setattr(stations, "_sampling_conditions", nothing)
+    monkeypatch.setattr(confirm, "_section_options_from_stored", lambda *_: None)
+    with pytest.raises(stations.StationsUnsynced):
+        asyncio.run(stations.ensure_structure_stations(UUID(PROJECT_ID)))
+
+    monkeypatch.setattr(sections, "_load_route_polyline", lambda *_: [])
+    monkeypatch.setattr(plus, "save_plus_stations", lambda _root, chainages, _xy: list(chainages))
+    response = asyncio.run(
+        stations.put_plus_stations(UUID(PROJECT_ID), stations.PlusStationsRequest(chainages=[120]))
+    )
+    body = json.loads(response.body)
+    assert body["status"] == "success" and body["chainages"] == [120]
+    assert body["stations_synced"] is False  # 저장은 그대로 · 맞춤 실패 알림
+
+    monkeypatch.setattr(stations, "_missing_marks", lambda *_: [])
+    assert (
+        asyncio.run(stations.ensure_structure_stations(UUID(PROJECT_ID))) == 0
+    )  # 맞출 것 없음 = 조용
diff --git a/resources/tester/test_280_5_b07_settings.py b/resources/tester/test_280_5_b07_settings.py
index 7ff3cc559..69ba47d16 100644
--- a/resources/tester/test_280_5_b07_settings.py
+++ b/resources/tester/test_280_5_b07_settings.py
@@ -83,6 +83,7 @@ def test_횡단_모달은_배치_칸_표_배율_안내선(out):
     assert cross["guideLast"] is True
     assert cross["head"] == [["원본에서 다시 그리기", False]]
     assert cross["notes"] == ["지금 도면: cross_s1"]
+    assert cross["scaleTitle"] == "축척 — 횡단도 장(표준 횡단면도 뺌)"
     saved = out["crossSave"]
     assert saved["closed"] is True
     assert saved["saved"] == [[{"default": [4, 4], "sheets": {"1": [2, 2]}, "table_scale": 1.2}, 1]]
@@ -93,7 +94,7 @@ def test_구조물_종단_평면도_모달(out):
     assert structure["title"] == "구조물 도면 설정"
     assert structure["notes"] == ["M02 그림 — 축척 없음"]
     assert structure["head"][0][1] is True  # 다른 묶음 도면을 연 중 = 꺼짐
-    assert out["longModal"] == {"title": "종단도 설정", "bodyKids": 0}  # 축척 칸은 485-2
+    assert out["longModal"] == {"title": "종단도 설정", "bodyKids": 1}  # 축척 칸(485-2)
     assert out["planModal"] == {"viaManager": True, "head": [["원본에서 다시 그리기", False]]}
     assert out["planRedraw"] == {"redraws": 1, "closed": True}
     assert out["standardInCross"] is True
@@ -216,3 +217,48 @@ def test_서버_단계_완료(monkeypatch, tmp_path: Path) -> None:
 
     monkeypatch.setattr(router, "_confirmed_source", blocked)
     assert asyncio.run(router.complete_design_stage(project)).status_code == 409
+
+
+RANGE = "1/100~1/10,000 사이 정수"
+
+
+def test_485_2_축척_칸_판정(out):
+    assert out["readAxis"] == [1000, RANGE, RANGE, RANGE, RANGE, RANGE, None]  # 자동 = null
+    assert out["toSend"] == [None, 500, None]  # 기본과 같으면 null
+
+
+def test_485_2_종단_축척_저장(out):
+    scale = out["scale"]
+    assert scale["longLabels"] == ["X(가로) 1/", "Y(세로) 1/"]
+    assert scale["longStart"]["values"] == ["1000", "200"]
+    assert scale["longStart"]["autos"] == []  # 종단 = 자동 없음
+    for bad in ("longLow", "longFrac"):  # 범위 밖 · 소수 = 붉음 + 저장 꺼짐
+        assert scale[bad]["errors"] == [RANGE, None]
+        assert scale[bad]["save"] is False
+    assert scale["longOk"]["errors"] == [None, None] and scale["longOk"]["save"] is True
+    # 저장본 2장 — 물음 [취소] = 요청 없음 · 모달 그대로
+    assert scale["cancel"] == {"calls": ["ask"], "open": True, "closed": 0}
+    save = scale["save"]
+    assert "저장본 2장" in save["ask"]
+    assert save["sent"] == {"longitudinal": {"x": 500, "y": None}}  # Y = 기본 → null
+    assert save["open"] is False
+    assert save["closed"] == [[True, "longitudinal"]]  # 화면 다시 세움 · 같은 도면
+    assert scale["reset"]["values"] == ["1000", "200"]  # [기본값] = 칸만
+    assert scale["same"] == {"calls": 0, "toasts": ["바뀐 축척이 없습니다."]}
+
+
+def test_485_2_토적_전개도_자동(out):
+    scale = out["scale"]
+    assert scale["massStart"] == {
+        "values": ["", "50000"],
+        "errors": [None, None],
+        "disabled": [True, False],
+        "autos": [True],
+        "save": True,
+    }
+    assert scale["massManual"]["errors"][0] and scale["massManual"]["save"] is False  # 빈 칸
+    assert scale["massTyped"]["save"] is True
+    assert scale["massSent"] == {"ask": 0, "sent": {"mass_haul": {"x": 2000, "y": None}}}
+    assert scale["massBack"]["autos"] == [True] and scale["massBack"]["save"] is True
+    assert scale["dev"]["autos"] == [True, True] and scale["dev"]["disabled"] == [True, True]
+    assert scale["structure"] == 0  # 구조물 = 축척 칸 없음