diff --git a/B07_DesignDetail/B07_DesignDetail_UI_Page.ts b/B07_DesignDetail/B07_DesignDetail_UI_Page.ts
index a85e64072..003fd85d3 100644
--- a/B07_DesignDetail/B07_DesignDetail_UI_Page.ts
+++ b/B07_DesignDetail/B07_DesignDetail_UI_Page.ts
@@ -137,6 +137,7 @@ export async function renderB07DesignDetail(root: HTMLElement): Promise<void> {
 
   // 표준도 제원 칸·[여기서 고치기]는 2026-09-13 B08 「구조물도」 탭으로 이관(PLAN 3장 ④).
   const updateInfoPanel = (drawing: DesignDrawingItem, response: DesignDrawingResponse): void => {
+    void fillCrossLayout(drawing);
     if (drawing.kind !== "cross") {
       infoPanelHost.replaceChildren();
       return;
@@ -144,28 +145,37 @@ export async function renderB07DesignDetail(root: HTMLElement): Promise<void> {
     // 장은 id 가 `cross_s…`(여러 측점 묶음), 측점 도면은 `cross_…m` 이다. `chainage_m` 은
     // 장에도 첫 측점 값이 실려 오므로 그것으로는 갈리지 않는다.
     const scope = isCrossSheet(drawing) ? "sheet" : "station";
-    const panel = buildDesignInfoPanel(drawing.label, response.design ?? null, scope);
-    infoPanelHost.replaceChildren(panel);
-    if (scope === "sheet") void appendCrossLayout(drawing, panel);
+    infoPanelHost.replaceChildren(
+      buildDesignInfoPanel(drawing.label, response.design ?? null, scope),
+    );
   };
 
-  /** 장 배치 칸(140-3) — 적용 = 서버 쓰기 → 목록 다시 · 같은 장 번호를 다시 엶. */
-  const appendCrossLayout = async (drawing: DesignDrawingItem, panel: HTMLElement) => {
+  /** 장 배치 칸 자리(153-1) — 횡단도 묶음 맨 아래 · 정보 칸을 다시 그려도 남음. */
+  const crossLayoutSlot = document.createElement("div");
+  crossLayoutSlot.className = "b07-cross-layout-slot";
+  let crossLayoutRequest: Promise<CrossLayout> | undefined;
+
+  /** 장 배치 칸(140-3) — 적용 = 서버 쓰기 → 목록 다시 · 같은 장 번호를 다시 엶. 장 아니면 기본값 · [이 장] 꺼짐. */
+  const fillCrossLayout = async (drawing: DesignDrawingItem) => {
     if (!projectId) return;
-    const number = drawings.filter(isCrossSheet).findIndex((item) => item.id === drawing.id) + 1;
     let layout: CrossLayout;
     try {
-      layout = await fetchCrossLayout(projectId);
+      layout = await (crossLayoutRequest ??= fetchCrossLayout(projectId));
     } catch {
+      crossLayoutRequest = undefined;
       return; // 배치 칸만 빠짐 — 도면 보기는 그대로
     }
-    if (currentDrawing?.id !== drawing.id || !panel.isConnected) return;
+    if (currentDrawing?.id !== drawing.id) return;
+    const number = isCrossSheet(drawing)
+      ? drawings.filter(isCrossSheet).findIndex((item) => item.id === drawing.id) + 1
+      : 0;
     const save = async (next: CrossLayout) => {
       if (!mayDiscardEdits()) return;
       showLoadingOverlay();
       try {
         await saveCrossLayout(projectId, next);
-        reopenCrossSheet = number;
+        reopenCrossSheet = number || undefined;
+        reopenDrawingId = number ? undefined : currentDrawing?.id;
         cad.destroy();
         void renderB07DesignDetail(root);
       } catch (error) {
@@ -174,10 +184,12 @@ export async function renderB07DesignDetail(root: HTMLElement): Promise<void> {
         hideLoadingOverlay();
       }
     };
-    panel.append(
+    crossLayoutSlot.replaceChildren(
       buildCrossLayoutControls(
-        layout.sheets[String(number)] ?? layout.default,
-        (grid) => void save({ ...layout, sheets: { ...layout.sheets, [String(number)]: grid } }),
+        (number && layout.sheets[String(number)]) || layout.default,
+        number
+          ? (grid) => void save({ ...layout, sheets: { ...layout.sheets, [String(number)]: grid } })
+          : null,
         (grid) => void save({ default: grid, sheets: {} }),
       ),
     );
@@ -517,6 +529,7 @@ export async function renderB07DesignDetail(root: HTMLElement): Promise<void> {
           },
         }
       : undefined,
+    crossLayoutSlot,
   );
   drawingListEl = drawingPanel;
   const confirmActions = document.createElement("div");
diff --git a/B07_DesignDetail/B07_DesignDetail_UI_Panels.ts b/B07_DesignDetail/B07_DesignDetail_UI_Panels.ts
index 9fcda741d..83bfd7725 100644
--- a/B07_DesignDetail/B07_DesignDetail_UI_Panels.ts
+++ b/B07_DesignDetail/B07_DesignDetail_UI_Panels.ts
@@ -7,7 +7,7 @@
  * ========================================================================== */
 
 import { attachCollapsible } from "@ui/ui_template_collapsible";
-import { showToast } from "@ui/ui_template_elements";
+import { createButton, createInputField, showToast } from "@ui/ui_template_elements";
 import { currentLanguageIndex, ui_locales } from "@ui/ui_template_locale";
 import type { CrossDesignInfo, DesignDrawingItem } from "./B07_DesignDetail_Api_Fetch";
 import { buildPlanSection } from "./B07_DesignDetail_UI_PlanKinds";
@@ -46,6 +46,8 @@ export function buildDrawingSidePanel(
   errorMessage?: string,
   devBypass = false,
   plan?: PlanManageControls,
+  /** 횡단도 묶음 맨 아래에 붙일 자리(153-1 장 배치 칸) — 내용은 화면 조립이 도면을 열 때마다 채움. */
+  crossTools?: HTMLElement,
 ): HTMLDivElement {
   const panel = document.createElement("div");
   panel.className = "b07-drawing-list";
@@ -147,6 +149,7 @@ export function buildDrawingSidePanel(
       // 횡단면도는 장 단위(여러 측점)라 서버가 준 "N장 (구간)" 라벨을 그대로 쓴다.
       section.append(drawingButton(drawing, drawing.label));
     }
+    if (cross && crossTools) section.append(crossTools);
     panel.append(section);
   }
   attachCollapsible(panel);
@@ -172,54 +175,52 @@ export function isCrossSheet(drawing: DesignDrawingItem): boolean {
   return drawing.kind === "cross" && drawing.id.startsWith("cross_s");
 }
 
-/** 횡단 장 배치 칸(140-3) — 「배치 열 [4] × 행 [4] [적용]」 + [모든 장 기본]. */
+/**
+ * 횡단 장 배치 칸(140-3 · 153-1) — 「배치 열 [4] 행 [4] [이 장] [모든 장]」.
+ * `onApply` 가 없으면(장이 아닌 도면) [이 장]을 끔.
+ */
 export function buildCrossLayoutControls(
   grid: [number, number],
-  onApply: (grid: [number, number]) => void,
+  onApply: ((grid: [number, number]) => void) | null,
   onAllDefault: (grid: [number, number]) => void,
 ): HTMLElement {
   const box = document.createElement("div");
-  box.className = "b07-info__layout";
-  const number = (value: number, label: string): HTMLInputElement => {
-    const input = document.createElement("input");
-    input.type = "number";
-    input.min = "1";
-    input.max = "10";
-    input.step = "1";
-    input.value = String(value);
-    input.ariaLabel = label;
-    return input;
-  };
-  const cols = number(grid[0], "열");
+  box.className = "b07-cross-layout";
+  const number = (value: number, label: string) =>
+    createInputField({
+      label,
+      type: "number",
+      value: String(value),
+      min: 1,
+      max: 10,
+      compact: true,
+    });
+  const cols = number(grid[0], "배치 열");
   const rows = number(grid[1], "행");
   const read = (): [number, number] | null => {
-    const value: [number, number] = [Number(cols.value), Number(rows.value)];
+    const value: [number, number] = [Number(cols.input.value), Number(rows.input.value)];
     return value.every((n) => Number.isInteger(n) && n >= 1 && n <= 10) ? value : null;
   };
-  const action = (text: string, title: string, run: (grid: [number, number]) => void) => {
-    const node = document.createElement("button");
-    node.type = "button";
-    node.className = "b07-plan-tools__button";
-    node.textContent = text;
-    node.title = title;
-    node.addEventListener("click", () => {
-      const value = read();
-      if (value) run(value);
-      else showToast("열 · 행은 1~10 사이 정수로 적어 주세요.", "error");
+  const action = (label: string, title: string, run: ((grid: [number, number]) => void) | null) => {
+    const button = createButton({
+      label,
+      variant: "ghost",
+      size: "sm",
+      disabled: !run,
+      onClick: () => {
+        const value = read();
+        if (value) run?.(value);
+        else showToast("열 · 행은 1~10 사이 정수로 적어 주세요.", "error");
+      },
     });
-    return node;
+    button.title = title;
+    return button;
   };
-  const label = document.createElement("span");
-  label.textContent = "배치 열";
-  const times = document.createElement("span");
-  times.textContent = "× 행";
   box.append(
-    label,
-    cols,
-    times,
-    rows,
-    action("적용", "이 장만 이 배치로", onApply),
-    action("모든 장 기본", "모든 장을 이 배치로(장마다 값 지움)", onAllDefault),
+    cols.root,
+    rows.root,
+    action("이 장", "이 장만 이 배치로", onApply),
+    action("모든 장", "모든 장을 이 배치로(장마다 값 지움)", onAllDefault),
   );
   return box;
 }
diff --git a/B07_DesignDetail/B07_DesignDetail_UI_Style.css b/B07_DesignDetail/B07_DesignDetail_UI_Style.css
index 3835e57aa..e99f64b41 100644
--- a/B07_DesignDetail/B07_DesignDetail_UI_Style.css
+++ b/B07_DesignDetail/B07_DesignDetail_UI_Style.css
@@ -225,18 +225,41 @@
   color: var(--color-text-muted);
 }
 
-/* 횡단 장 배치(140-3) — 배치 열 [4] × 행 [4] [적용] [모든 장 기본] */
-.b07-info__layout {
+/* 횡단 장 배치(153-1) — 횡단도 묶음 맨 아래 전체 폭: 배치 열 [4] 행 [4] [이 장] [모든 장].
+   좌측이 182px 까지 줄어드니 줄바꿈 허용 · 공용 칸의 오류 자리는 접음. */
+.b07-cross-layout-slot {
+  grid-column: 1 / -1;
+}
+
+.b07-cross-layout-slot:empty {
+  display: none;
+}
+
+.b07-cross-layout {
   display: flex;
   flex-wrap: wrap;
   align-items: center;
-  gap: var(--spacing-4);
-  color: var(--color-text-muted);
-  font-size: var(--text-caption);
+  gap: var(--spacing-4) var(--spacing-8);
 }
 
-.b07-info__layout input {
-  width: 44px;
+.b07-cross-layout > .ui-field {
+  display: flex;
+  flex-direction: row;
+  align-items: center;
+  gap: var(--spacing-4);
+}
+
+.b07-cross-layout .ui-field__label {
+  margin: 0;
+  white-space: nowrap;
+}
+
+.b07-cross-layout .ui-input {
+  width: 48px;
+}
+
+.b07-cross-layout .ui-field__error {
+  display: none;
 }
 
 /* 확정을 건너뛴 개발 상태 알림 — 눈에 띄되 도면 목록을 밀어내지 않게 한 줄만. */
diff --git a/resources/tester/helper_153_b07_cross_layout.cjs b/resources/tester/helper_153_b07_cross_layout.cjs
new file mode 100644
index 000000000..dc221cc88
--- /dev/null
+++ b/resources/tester/helper_153_b07_cross_layout.cjs
@@ -0,0 +1,165 @@
+/* 153-1 B07 횡단 장 배치 칸 헬퍼 — 좌측 「횡단도」 묶음 맨 아래 자리 · 공용 입력칸 · 작은 단추를
+ * Node 로 돌려 표준출력 JSON 한 벌로. TS 는 그 자리에서 트랜스파일 · 화면 그릇(DOM)은 쓰는 만큼만 흉내 ·
+ * 공용 단추 · 입력칸은 진짜(`ui_template_elements`) · 알림만 기록용 가짜.
+ */
+const fs = require("fs");
+const path = require("path");
+const ts = require(path.join(__dirname, "..", "..", "config", "node_modules", "typescript"));
+
+const ROOT = path.join(__dirname, "..", "..");
+const B07 = path.join(ROOT, "B07_DesignDetail");
+const UI = path.join(ROOT, "ui_template");
+const cache = new Map();
+
+class FakeNode {
+  constructor(tag) {
+    this.tagName = tag.toUpperCase();
+    this.children = [];
+    this.dataset = {};
+    this.attrs = {};
+    this.listeners = {};
+    this._text = "";
+    this._classes = new Set();
+    this.value = "";
+    this.disabled = false;
+    const self = this;
+    this.classList = {
+      add: (...names) => names.forEach((n) => self._classes.add(n)),
+      remove: (...names) => names.forEach((n) => self._classes.delete(n)),
+      contains: (name) => self._classes.has(name),
+    };
+  }
+  set className(value) {
+    this._classes = new Set(String(value).split(/\s+/).filter(Boolean));
+  }
+  get className() {
+    return [...this._classes].join(" ");
+  }
+  set textContent(value) {
+    this._text = String(value);
+    this.children = [];
+  }
+  get textContent() {
+    return this._text + this.children.map((c) => c.textContent).join("");
+  }
+  setAttribute(key, value) {
+    this.attrs[key] = String(value);
+  }
+  append(...kids) {
+    kids.forEach((k) => this.children.push(k));
+  }
+  replaceChildren(...kids) {
+    this.children = [...kids];
+  }
+  addEventListener(type, handler) {
+    (this.listeners[type] ||= []).push(handler);
+  }
+  click() {
+    if (!this.disabled) (this.listeners.click || []).forEach((handler) => handler({}));
+  }
+}
+const all = (node) => [node, ...node.children.flatMap(all)];
+const byClass = (node, name) => all(node).filter((n) => n.classList.contains(name));
+
+globalThis.document = { createElement: (tag) => new FakeNode(tag) };
+
+const toasts = [];
+function loadTs(file) {
+  const full = path.resolve(file);
+  if (cache.has(full)) return cache.get(full);
+  const js = ts.transpileModule(fs.readFileSync(full, "utf8"), {
+    compilerOptions: { module: ts.ModuleKind.CommonJS, target: ts.ScriptTarget.ES2020 },
+  }).outputText;
+  const box = { exports: {} };
+  cache.set(full, box.exports);
+  const localRequire = (request) => {
+    if (request === "@ui/ui_template_elements")
+      return {
+        ...loadTs(path.join(UI, "ui_template_elements.ts")),
+        showToast: (message, kind) => toasts.push([kind, message]),
+      };
+    if (request === "@ui/ui_template_collapsible") return { attachCollapsible: () => {} };
+    if (request === "@ui/ui_template_locale")
+      return {
+        currentLanguageIndex: 0,
+        ui_locales: new Proxy({}, { get: (_, key) => [String(key)] }),
+      };
+    if (request.startsWith(".")) {
+      const target = path.join(path.dirname(full), `${request}.ts`);
+      return fs.existsSync(target) ? loadTs(target) : {};
+    }
+    return {}; // 이 시험이 안 부르는 바깥 길(API · 설정 · CAD)
+  };
+  new Function("exports", "module", "require", js)(box.exports, box, localRequire);
+  cache.set(full, box.exports);
+  return box.exports;
+}
+
+const { buildDrawingSidePanel, buildCrossLayoutControls } = loadTs(
+  path.join(B07, "B07_DesignDetail_UI_Panels.ts"),
+);
+
+const out = {};
+const slot = new FakeNode("div");
+slot.className = "b07-cross-layout-slot";
+const panel = buildDrawingSidePanel(
+  [
+    { id: "cross_standard", kind: "cross_standard", label: "표준 횡단면도", confirmed: false },
+    { id: "cross_s1", kind: "cross", label: "1장", confirmed: false },
+    { id: "cross_s2", kind: "cross", label: "2장", confirmed: true },
+  ],
+  () => {},
+  undefined,
+  false,
+  undefined,
+  slot,
+);
+const cross = all(panel).find((n) => n.dataset.kind === "cross");
+out.slotLast = cross.children.at(-1) === slot;
+out.slotCount = all(panel).filter((n) => n === slot).length;
+
+// 장 — [이 장] 켜짐 · 값 바꿔 누름
+const applied = [];
+const defaults = [];
+slot.replaceChildren(
+  buildCrossLayoutControls(
+    [3, 4],
+    (grid) => applied.push(grid),
+    (grid) => defaults.push(grid),
+  ),
+);
+const box = slot.children[0];
+const buttons = () => all(slot).filter((n) => n.tagName === "BUTTON");
+const inputs = () => all(slot).filter((n) => n.tagName === "INPUT");
+out.sheet = {
+  boxClass: box.className,
+  labels: byClass(slot, "ui-field__label").map((n) => n.textContent),
+  inputs: inputs().map((n) => ({
+    value: n.value,
+    type: n.attrs.type,
+    min: n.attrs.min,
+    max: n.attrs.max,
+    cls: n.className,
+  })),
+  buttons: buttons().map((n) => ({ text: n.textContent, cls: n.className, disabled: n.disabled })),
+};
+inputs()[0].value = "2";
+inputs()[1].value = "5";
+buttons()[0].click();
+buttons()[1].click();
+inputs()[0].value = "11";
+buttons()[0].click();
+out.sheetClicks = { applied, defaults, toasts: [...toasts] };
+
+// 장 아님 — [이 장] 꺼짐 · [모든 장]은 됨
+const defaults2 = [];
+slot.replaceChildren(buildCrossLayoutControls([4, 4], null, (grid) => defaults2.push(grid)));
+buttons()[0].click();
+buttons()[1].click();
+out.notSheet = {
+  disabled: buttons().map((n) => n.disabled),
+  defaults: defaults2,
+  values: inputs().map((n) => n.value),
+};
+
+process.stdout.write(JSON.stringify(out));
diff --git a/resources/tester/test_153_1_b07_cross_layout.py b/resources/tester/test_153_1_b07_cross_layout.py
new file mode 100644
index 000000000..58275b487
--- /dev/null
+++ b/resources/tester/test_153_1_b07_cross_layout.py
@@ -0,0 +1,63 @@
+# -*- coding: utf-8 -*-
+"""153-1 B07 횡단 장 배치 칸.
+
+못박는 것
+  - 배치 칸 자리 = 좌측 「횡단도」 묶음 맨 아래(한 번만) — 정보 칸을 다시 그려도 안 사라짐.
+  - 공용 입력칸(ui-field__label · ui-input--sm · 1~10) 둘 + 작은 ghost 단추 [이 장] [모든 장].
+  - 장이 아니면 [이 장] 꺼짐 · [모든 장]은 됨 · 범위 밖 값 = 알림만.
+
+Node 헬퍼 `helper_153_b07_cross_layout.cjs` 가 화면 그릇 흉내로 돌림. 화면은 사용자 확인.
+"""
+
+import json
+import os
+import subprocess
+
+import pytest
+
+HERE = os.path.dirname(os.path.abspath(__file__))
+
+
+@pytest.fixture(scope="module")
+def out():
+    proc = subprocess.run(
+        ["node", os.path.join(HERE, "helper_153_b07_cross_layout.cjs")],
+        capture_output=True,
+        text=True,
+        encoding="utf-8",
+        timeout=60,
+    )
+    assert proc.returncode == 0, proc.stderr
+    return json.loads(proc.stdout)
+
+
+def test_횡단도_묶음_맨_아래(out):
+    assert out["slotLast"] is True
+    assert out["slotCount"] == 1
+
+
+def test_공용_입력칸과_작은_단추(out):
+    sheet = out["sheet"]
+    assert sheet["boxClass"] == "b07-cross-layout"
+    assert sheet["labels"] == ["배치 열", "행"]
+    assert [i["value"] for i in sheet["inputs"]] == ["3", "4"]
+    for field in sheet["inputs"]:
+        assert field["type"] == "number" and field["min"] == "1" and field["max"] == "10"
+        assert "ui-input--sm" in field["cls"]
+    assert [b["text"] for b in sheet["buttons"]] == ["이 장", "모든 장"]
+    for button in sheet["buttons"]:
+        assert button["cls"] == "ui-btn ui-btn--ghost ui-btn--sm" and not button["disabled"]
+
+
+def test_이_장_모든_장_누름(out):
+    clicks = out["sheetClicks"]
+    assert clicks["applied"] == [[2, 5]]
+    assert clicks["defaults"] == [[2, 5]]
+    assert [t[0] for t in clicks["toasts"]] == ["error"]  # 11 = 범위 밖
+
+
+def test_장_아니면_이_장_꺼짐(out):
+    not_sheet = out["notSheet"]
+    assert not_sheet["disabled"] == [True, False]
+    assert not_sheet["defaults"] == [[4, 4]]
+    assert not_sheet["values"] == ["4", "4"]