diff --git a/B08_Quantity/B08_Quantity_UI_Drawing.css b/B08_Quantity/B08_Quantity_UI_Drawing.css
index 4d0dfee05..43172e579 100644
--- a/B08_Quantity/B08_Quantity_UI_Drawing.css
+++ b/B08_Quantity/B08_Quantity_UI_Drawing.css
@@ -46,3 +46,26 @@
     grid-template-columns: minmax(0, 1fr);
   }
 }
+
+/* 「조합 연결」 칸(154-2) — 시설 이름 · 칸 줄(이름 · 연결 여부 · [선택]) */
+.b08-link__facility {
+  margin: 0;
+  font-weight: var(--font-weight-semibold);
+  color: var(--color-text);
+}
+
+.b08-link__slot {
+  display: grid;
+  grid-template-columns: minmax(120px, 200px) 1fr auto;
+  align-items: center;
+  gap: var(--spacing-8);
+  padding-left: var(--spacing-16);
+}
+
+.b08-link__state {
+  color: var(--color-text-secondary);
+}
+
+.b08-link__state.is-missing {
+  color: var(--color-danger);
+}
diff --git a/B08_Quantity/B08_Quantity_UI_Drawing.ts b/B08_Quantity/B08_Quantity_UI_Drawing.ts
index 60dc1a94e..2e3167817 100644
--- a/B08_Quantity/B08_Quantity_UI_Drawing.ts
+++ b/B08_Quantity/B08_Quantity_UI_Drawing.ts
@@ -6,6 +6,7 @@
  *
  *   원천 = 그 구조물의 프로젝트 사본만(연결된 사본 · PLAN 143-1) — 없으면 「사본 없음」 · 읽기만
  *   조합 목록 = 집계표와 같음(`B08_Quantity_Summary_Data` `combosAt`)
+ *   미연결 시설이 있으면 맨 위 「조합 연결」 칸(`B08_Quantity_UI_Link` · PLAN 154-2) — 저장하면 닫고 다시 셈
  *   카드 · CAD · 스프레드시트는 모달을 열 때만 `import()` · 닫을 때 카드를 모두 정리
  * ========================================================================== */
 
@@ -16,7 +17,13 @@ import { PART_OF, projectItems } from "@ui/ui_template_item_picker_project";
 import type { ItemCardsHandle } from "../M02_MasterTemplete/M02_MasterTemplete_ItemCards";
 import type { ItemSource } from "../M02_MasterTemplete/M02_MasterTemplete_ItemSource";
 import { summaryTooltip, type SummaryItem } from "../common_util/common_util_summary_item";
-import type { ComboLabel, LinkedSnapshot, StationCombo } from "./B08_Quantity_Summary_Data";
+import type {
+  ComboLabel,
+  LinkedSnapshot,
+  StationCombo,
+  UnlinkedFacility,
+} from "./B08_Quantity_Summary_Data";
+import { linkSection } from "./B08_Quantity_UI_Link";
 
 function L(key: keyof typeof ui_locales): string {
   return ui_locales[key][currentLanguageIndex];
@@ -37,6 +44,10 @@ export interface SheetsRequest {
   /** 연결된 사본 `{구조물 id: 사본}`(집계 응답 · 143-1) */
   linked: Record<string, LinkedSnapshot>;
   describe: (item: SummaryItem) => ComboLabel | null;
+  /** 그 측점 미연결 시설(154) */
+  unlinked: UnlinkedFacility[];
+  /** 바로 연결을 저장한 뒤 — 집계표 다시 셈 */
+  onLinked: () => void;
 }
 
 /** 사본 폴더 읽기 — 그 부분 파일이 없으면 던짐(카드가 「없음」). */
@@ -108,15 +119,30 @@ export function openStructureSheets(request: SheetsRequest): void {
       handles.forEach((cards) => cards.destroy());
       return true;
     },
-    mount: (body) => {
-      if (!request.combos.length) return void body.append(note(L("B08_Quantity_Summary_NoCombo")));
-      body.append(note(L("B08_Quantity_Drawing_Loading")));
+    mount: (body, close) => {
+      const linking = request.unlinked.length
+        ? [
+            linkSection(request.projectId, request.unlinked, () => {
+              closed = true;
+              handles.forEach((cards) => cards.destroy());
+              close();
+              request.onLinked();
+            }),
+          ]
+        : [];
+      if (!request.combos.length)
+        return void body.append(
+          ...linking,
+          ...(linking.length ? [] : [note(L("B08_Quantity_Summary_NoCombo"))]),
+        );
+      body.append(...linking, note(L("B08_Quantity_Drawing_Loading")));
       void (async () => {
         try {
           const { createItemCards } =
             await import("../M02_MasterTemplete/M02_MasterTemplete_ItemCards");
           if (closed) return;
           body.replaceChildren(
+            ...linking,
             ...request.combos.map((combo) =>
               comboSection(request, combo, createItemCards, handles),
             ),
@@ -124,7 +150,7 @@ export function openStructureSheets(request: SheetsRequest): void {
         } catch (error) {
           if (closed) return;
           const reason = error instanceof Error ? error.message : String(error);
-          body.replaceChildren(note(`${L("B08_Quantity_Drawing_Failed")} — ${reason}`));
+          body.replaceChildren(...linking, note(`${L("B08_Quantity_Drawing_Failed")} — ${reason}`));
         }
       })();
     },
diff --git a/B08_Quantity/B08_Quantity_UI_Link.ts b/B08_Quantity/B08_Quantity_UI_Link.ts
new file mode 100644
index 000000000..b7f9df6cb
--- /dev/null
+++ b/B08_Quantity/B08_Quantity_UI_Link.ts
@@ -0,0 +1,102 @@
+/* =============================================================================
+ * B08_Quantity_UI_Link.ts
+ * 구조물도 모달 맨 위 「조합 연결」 칸(PLAN 154-2) — 그 측점 미연결 시설의 칸 전부 + 연결 여부.
+ *
+ *   [선택] → 공용 고르기 모달(`openItemPicker` · 누를 때 `import()`) → 바로 저장
+ *     = PUT …/items/{사본 id}/link(그 칸 하나만 정본에 · 서버가 사본 맞춤) → 집계표 다시 셈
+ *   B05/B06 세션 초안(구조물 · 관)이 있으면 막고 알림 — 그쪽 [저장]이 목록 통째로 덮어 연결이 사라짐
+ * ========================================================================== */
+
+import { ui_locales, currentLanguageIndex } from "@ui/ui_template_locale";
+import { createButton, showToast } from "@ui/ui_template_elements";
+import { projectItems } from "@ui/ui_template_item_picker_project";
+import { readPendingStructures } from "../B05_Profile/B05_Profile_Api_Structures";
+import { readPendingPipes } from "../B05_Profile/B05_Profile_Api_Pipes_Draft";
+import type { SummaryItem } from "../common_util/common_util_summary_item";
+import type { UnlinkedFacility, UnlinkedSlot } from "./B08_Quantity_Summary_Data";
+
+function L(key: keyof typeof ui_locales): string {
+  return ui_locales[key][currentLanguageIndex];
+}
+
+/** B05/B06 에 저장 안 한 구조물 · 관 조작이 있나(세션 초안). */
+export const hasPendingDesign = (projectId: string): boolean =>
+  readPendingStructures(projectId) !== null || readPendingPipes(projectId) !== null;
+
+/** 칸 하나 고르고 바로 저장 — 저장했으면 true(취소 · 막힘 · 실패 = false). */
+async function pickAndLink(
+  projectId: string,
+  facility: UnlinkedFacility,
+  slot: UnlinkedSlot,
+): Promise<boolean> {
+  if (hasPendingDesign(projectId)) {
+    showToast(L("B08_Quantity_Link_Pending"), "warning", 5000);
+    return false;
+  }
+  const { openItemPicker } = await import("@ui/ui_template_item_picker");
+  const result = await openItemPicker({
+    current: slot.item,
+    canCopy: true,
+    projectId,
+    structureId: slot.copy,
+  });
+  if (result.action === "cancel") return false;
+  const item: SummaryItem | null = result.action === "apply" ? result.item : null;
+  try {
+    const failed = await projectItems(projectId).link(slot.copy, facility.facility, item);
+    if (failed.length)
+      showToast(`${L("B08_Quantity_Link_CopyFailed")} — ${failed.join(", ")}`, "warning");
+    else showToast(L("B08_Quantity_Link_Saved"), "success");
+    return true;
+  } catch (error) {
+    showToast(`${L("B08_Quantity_Link_Failed")} — ${String(error)}`, "error");
+    return false;
+  }
+}
+
+/** 「조합 연결」 칸 — 시설마다 이름 + 칸 줄(이름 · 연결 여부 · [선택]). `onLinked` = 저장 뒤(모달 닫고 다시 셈). */
+export function linkSection(
+  projectId: string,
+  facilities: readonly UnlinkedFacility[],
+  onLinked: () => void,
+): HTMLElement {
+  const section = document.createElement("section");
+  section.className = "b08-sheets__combo b08-link";
+  section.dataset.b08Link = "section";
+  const title = document.createElement("h4");
+  title.className = "b08-sheets__title";
+  title.textContent = L("B08_Quantity_Link_Title");
+  section.append(title);
+  for (const facility of facilities) {
+    const head = document.createElement("p");
+    head.className = "b08-link__facility";
+    head.textContent = facility.name;
+    section.append(head);
+    for (const slot of facility.slots) {
+      const row = document.createElement("div");
+      row.className = "b08-link__slot";
+      row.dataset.b08LinkSlot = slot.copy;
+      const name = document.createElement("span");
+      name.textContent = slot.group ?? L("B08_Quantity_Link_Body");
+      const state = document.createElement("span");
+      state.className = slot.linked ? "b08-link__state" : "b08-link__state is-missing";
+      state.textContent = slot.linked
+        ? `${L("B08_Quantity_Link_Linked")} · ${slot.item?.name ?? ""}`
+        : L("B08_Quantity_Summary_Unlinked");
+      const button = createButton({
+        label: L("B08_Quantity_Link_Pick"),
+        variant: "ghost",
+        size: "sm",
+        onClick: () => {
+          button.disabled = true;
+          void pickAndLink(projectId, facility, slot).then((saved) =>
+            saved ? onLinked() : (button.disabled = false),
+          );
+        },
+      });
+      row.append(name, state, button);
+      section.append(row);
+    }
+  }
+  return section;
+}
diff --git a/B08_Quantity/B08_Quantity_UI_Summary.ts b/B08_Quantity/B08_Quantity_UI_Summary.ts
index 1f3424ec7..b32efc609 100644
--- a/B08_Quantity/B08_Quantity_UI_Summary.ts
+++ b/B08_Quantity/B08_Quantity_UI_Summary.ts
@@ -12,6 +12,7 @@
  *     조합 열에서 뺌 · 다른 구조물 열은 조합 그대로
  *   열 폭 = 맨 아래 단 글(+ 칸 값)만 잼 · 위 단 머리는 줄바꿈(`B08_Quantity_UI_Page.css` · 120-2)
  *   줄을 누르면 그 측점의 구조물도 모달(PLAN 95-3 · `B08_Quantity_UI_Drawing` 은 누를 때 `import()`)
+ *     미연결 시설 = 모달 맨 위 「조합 연결」 → 바로 저장 → 탭 몸통을 새로 그림(154-2)
  *   커플링 열 = 좌측 패널 1본 길이로 바로 다시 셈(관마다 길이 `pipes` · `recountCouplings` · PLAN 122)
  * ========================================================================== */
 
@@ -35,12 +36,12 @@ import {
   type ComboLabel,
   type LinkedSnapshot,
   type PlacedItem,
-  type StationCombo,
   type UnlinkedFacility,
   unlinkedAt,
   widthOf,
 } from "./B08_Quantity_Summary_Data";
 import { recountCouplings, type PipeLength } from "./B08_Quantity_Options_Calc";
+import type { SheetsRequest } from "./B08_Quantity_UI_Drawing";
 import { liveOnePipe, onOptionsChange } from "./B08_Quantity_UI_Options";
 
 function L(key: keyof typeof ui_locales): string {
@@ -179,16 +180,10 @@ function buildTable(
 }
 
 /** 행 누름 — 카드 · CAD 묶음은 이때 처음 받음. */
-async function openSheets(
-  projectId: string,
-  station: string,
-  combos: StationCombo[],
-  linked: Record<string, LinkedSnapshot>,
-  describe: (item: SummaryItem) => ComboLabel | null,
-): Promise<void> {
+async function openSheets(request: SheetsRequest): Promise<void> {
   try {
     const { openStructureSheets } = await import("./B08_Quantity_UI_Drawing");
-    openStructureSheets({ projectId, station, combos, linked, describe });
+    openStructureSheets(request);
   } catch (error) {
     showToast(`${L("B08_Quantity_Drawing_Failed")} — ${String(error)}`, "error");
   }
@@ -246,7 +241,20 @@ export async function renderStructureSummary(host: HTMLElement, projectId: strin
     const draw = (): HTMLElement =>
       stations.length
         ? buildTable(stations, columns, live(), comboPath, interval, unlinked, (station, label) =>
-            openSheets(projectId, label, combosAt(things, station), linked, describe),
+            openSheets({
+              projectId,
+              station: label,
+              combos: combosAt(things, station),
+              linked,
+              describe,
+              unlinked: unlinkedAt(unlinked, station),
+              // 새 몸통에 다시 그림 — 옛 몸통은 떨어져 옵션 듣기가 스스로 빠짐(겹침 없음)
+              onLinked: () => {
+                const fresh = document.createElement("div");
+                host.replaceWith(fresh);
+                void renderStructureSummary(fresh, projectId);
+              },
+            }),
           )
         : note(L("B08_Quantity_Summary_NoStation"));
     let table = draw();
diff --git a/M02_MasterTemplete/M02_Item_Copy.py b/M02_MasterTemplete/M02_Item_Copy.py
index a6fef7c8f..5f211bd52 100644
--- a/M02_MasterTemplete/M02_Item_Copy.py
+++ b/M02_MasterTemplete/M02_Item_Copy.py
@@ -1,5 +1,5 @@
-"""구조물 집계 항목 복사본 읽기 · 쓰기 · 재적용 · 미리 가져오기 · 개인에 저장 · 새 항목 · 계산
-(PLAN 25-2b · 26-2b).
+"""구조물 집계 항목 복사본 읽기 · 쓰기 · 재적용 · 미리 가져오기 · 개인에 저장 · 새 항목 · 계산 ·
+바로 연결(PLAN 25-2b · 26-2b · 154-2).
 
 복사본 = `{프로젝트}/templates/structures/{구조물 id}/`
 (`M02_Item_Snapshot`) · 길의 폴더 = 구조물 id.
@@ -15,7 +15,10 @@ from collections.abc import Callable
 from pathlib import Path
 from typing import Any
 
+from B05_Profile.B05_Profile_Structures_Repository import load_structures, save_structures
+from common_util.common_util_drainage_pipes import pipe_points_path_in
 from common_util.common_util_json import atomic_write_json
+from common_util.common_util_summary_item import GROUP_JOIN
 from M02_MasterTemplete import M02_Item_Personal as personal
 from M02_MasterTemplete import M02_Item_Prices as prices
 from M02_MasterTemplete import M02_Template_Layers as layers
@@ -342,3 +345,62 @@ def calc(project_root: str | Path, folder: str) -> dict[str, Any]:
         read_json(target / PICKS_FILE) or {},
         read_json(target / KINDS["면적"]),
     )
+
+
+def _put(record: dict[str, Any], gid: str, item: dict[str, Any] | None) -> None:
+    """조합 칸 하나 — 본체 = `summary_item` · 그룹 = `group_items[gid]` · None = 연결 풀기."""
+    if not gid:
+        record["summary_item"] = item
+        return
+    groups = dict(record.get("group_items") or {})
+    if item is None:
+        groups.pop(gid, None)
+    else:
+        groups[gid] = item
+    record["group_items"] = groups or None
+
+
+def link(
+    project_root: str | Path, copy: str, facility: str | None, item: dict[str, Any] | None
+) -> None:
+    """B08 바로 연결(154-2) — 그 시설 조합 칸 하나만 정본에 씀 · 다른 칸 · 시설 그대로.
+
+    `copy` = 사본 id(본체 = 시설 id · 그룹 = `{id}__{그룹}`) · 관 지점(`pipe@측점`)은 같은 측점
+    박스 + 관을 `facility` 로 가름 → `pipe_points.json`(노선 지문 그대로) · 구조물 →
+    `structures.json`(판번호 +1). 사본 맞춤(`safe_sync`)은 부른 쪽."""
+    owner, _, gid = copy.partition(GROUP_JOIN)
+    root = Path(project_root)
+    if owner.startswith("pipe@"):
+        path = pipe_points_path_in(root)
+        document = read_json(path)
+        points = document.get("points") if isinstance(document, dict) else None
+        at = owner.removeprefix("pipe@")
+        kind = facility or "pipe"
+        found = next(
+            (
+                point
+                for point in points or []
+                if isinstance(point, dict)
+                and f"{round(float(point.get('chainage_m', -1)), 3)}" == at
+                and (point.get("facility") or "pipe") == kind
+            ),
+            None,
+        )
+        if found is None:
+            raise LookupError(f"관 지점이 없음 「{copy}」 ({kind})")
+        _put(found, gid, item)
+        for key in ("summary_item", "group_items"):  # 저장 꼴(`PipePoint.as_dict`) — 빈 칸은 뺌
+            if not found.get(key):
+                found.pop(key, None)
+        atomic_write_json(path, document)
+        return
+    if not owner or owner.startswith("#"):
+        raise ValueError(f"id 없는 옛 구조물은 못 이음 「{copy}」 — B05 에서 한 번 [저장]")
+    revision, structures = load_structures(str(root))
+    target = next((one for one in structures if one.structure_id == owner), None)
+    if target is None:
+        raise LookupError(f"구조물이 없음 「{owner}」")
+    record = {"summary_item": target.summary_item, "group_items": target.group_items}
+    _put(record, gid, item)
+    target.summary_item, target.group_items = record["summary_item"], record["group_items"]
+    save_structures(str(root), structures, base_revision=revision)
diff --git a/M02_MasterTemplete/M02_Project_Items_Router.py b/M02_MasterTemplete/M02_Project_Items_Router.py
index 464ecaab4..0a6188e6b 100644
--- a/M02_MasterTemplete/M02_Project_Items_Router.py
+++ b/M02_MasterTemplete/M02_Project_Items_Router.py
@@ -8,6 +8,8 @@
     PUT  …/items/{폴더}/{종류}              {판, 내용} — 판이 다르면 409 · 면적은 서버 계산값
     POST …/items/{폴더}/reapply             재적용(입력값 · 고른자재는 같은 키면 살림 · `덮임` 알림)
     POST …/items/{폴더}/save-as {to, 경로, 이름}  개인 층에 새 항목으로(단가 묶음은 안 가져감)
+    PUT  …/items/{사본 id}/link {summary_item | null, facility}  B08 바로 연결(154-2) — 그 시설
+        조합 칸 하나만 정본에 씀 → 사본 맞춤 → {폴더, snapshot_failed}
     POST …/items/{폴더}/calc                복사본만으로 계산 — 층 셈 한 벌(142-1 · 줄 · 자재 ·
         기준합 · 반영합 + 알약 · 빠진입력 · 빈 입력 = 자동값)
 종류 = 도면 · 면적 · 입력값 · 고른자재 · 일위대가(읽기만 · 쓰면 400) ·
@@ -29,7 +31,7 @@ from common_util.common_util_summary_item import parse_summary_item
 from M02_MasterTemplete import M02_Item_Copy as copies
 from M02_MasterTemplete import M02_MasterTemplete_Router_Layers as layer_routes
 from M02_MasterTemplete import M02_MasterTemplete_Store as store
-from M02_MasterTemplete.M02_Item_Snapshot import importer
+from M02_MasterTemplete.M02_Item_Snapshot import folder_name, importer, safe_sync
 from M02_MasterTemplete.M02_Item_Source import item_name
 
 router = APIRouter(prefix="/api/projects", tags=["M02 Project Items"])
@@ -59,6 +61,11 @@ class SaveAsBody(BaseModel):
     이름: str | None = None
 
 
+class LinkBody(BaseModel):
+    summary_item: dict[str, Any] | None = None
+    facility: str | None = None  # 관 지점 종류(같은 측점 박스 + 관 가름) · 구조물은 없음
+
+
 class NewBody(BaseModel):
     structure: str
     경로: list[str] = []
@@ -139,6 +146,28 @@ async def read_item_file(
     return await _run(copies.read_file, await _root(session, project_id), folder, kind)
 
 
+@router.put("/{project_id}/items/{copy}/link")  # `{폴더}/{종류}` 길보다 먼저
+async def link_item(
+    project_id: str, copy: str, body: LinkBody, session: dict[str, Any] = Depends(verify_session)
+) -> dict[str, Any]:
+    item = None
+    if body.summary_item is not None:
+        raw = body.summary_item
+        try:  # 모양 먼저(이름은 자리만) — 이름이 없으면 층 SS 줄에서
+            item = parse_summary_item({**raw, "name": raw.get("name") or "-"})
+        except ValueError as error:
+            raise HTTPException(status_code=400, detail=str(error)) from error
+        if not raw.get("name"):
+            try:
+                item["name"] = item_name(item)
+            except LookupError as error:
+                raise HTTPException(status_code=404, detail=str(error)) from error
+    root = await _root(session, project_id)
+    await _run(copies.link, root, copy, body.facility, item)
+    failed = await asyncio.to_thread(safe_sync, root, importer(session))
+    return {"폴더": folder_name(copy), "snapshot_failed": failed}
+
+
 def _recalc(document: dict) -> dict:
     try:
         return spreadsheet.with_server_values(document)
diff --git a/resources/tester/test_154_2_b08_direct_link.py b/resources/tester/test_154_2_b08_direct_link.py
new file mode 100644
index 000000000..12bd79719
--- /dev/null
+++ b/resources/tester/test_154_2_b08_direct_link.py
@@ -0,0 +1,161 @@
+# -*- coding: utf-8 -*-
+"""B08 미연결 구조물 바로 연결(PLAN 154-2) — 임시 저장소.
+
+- 서버 `link` = 그 시설 조합 칸 하나만 정본에 씀(구조물 판번호 +1 · 관 지점 노선 지문 그대로)
+- 같은 측점 박스 + 관 = `facility` 로 가름 · 그룹 칸 = `group_items[gid]` · None = 풀기
+- 저장 뒤 사본 맞춤 → 사본 폴더 생김 → 집계 응답 `unlinked` 에서 빠짐
+- 길 차례(`{폴더}/{종류}` 보다 먼저) · 화면 = 초안 있으면 막음 · 고르기 모달 · 다시 그림
+"""
+
+from __future__ import annotations
+
+import json
+import shutil
+from pathlib import Path
+from typing import Any
+
+import pytest
+
+from B08_Quantity import B08_Quantity_Router_Summary as summary
+from config import config_system
+from M02_MasterTemplete import M02_Item_Copy as copies
+from M02_MasterTemplete import M02_Item_Snapshot as snap
+from M02_MasterTemplete import M02_Template_Layers as layers
+from M02_MasterTemplete.StructOptions import M02_SO_Definition as definition
+from resources.tester.helper_m02_master_sample import SAMPLE
+
+ROOT = Path(__file__).resolve().parents[2]
+PIPE = {"layer": "system", "owner": None, "key": "SS000011", "name": "관공 관매설"}
+RV = {"layer": "system", "owner": None, "key": "SS000001", "name": "돌기슭막이 메쌓기 1.2m"}
+MS = {"layer": "system", "owner": None, "key": "SS000022", "name": "돌쌓기"}
+
+POINTS = [
+    {"chainage_m": 100.0, "source": "user", "options": {"pipe_diameter_mm": 800},
+     "group_items": {"grv6lny": PIPE}},
+    {"chainage_m": 100.0, "source": "user", "facility": "box_culvert", "options": {}},
+    {"chainage_m": 200.0, "source": "user", "options": {"pipe_diameter_mm": 800}},
+]  # fmt: skip
+STRUCTURES = [
+    {"structure_id": "st0", "type_id": "open_ditch", "placement": "point", "chainage_m": 300},
+    {"structure_id": "st1", "type_id": "open_ditch", "placement": "point", "chainage_m": 400,
+     "summary_item": MS},
+]  # fmt: skip
+
+
+@pytest.fixture
+def root(tmp_path: Path, monkeypatch) -> Path:
+    system = tmp_path / "master"
+    system.mkdir()
+    shutil.copy2(SAMPLE / layers.COMBO_FILE, system / layers.COMBO_FILE)
+    for kind in ("table", "structure", "area"):
+        shutil.copytree(SAMPLE / kind, system / kind)
+    monkeypatch.setattr(layers, "SYSTEM_ROOT", system)
+    storage = tmp_path / "storage"
+    monkeypatch.setattr(config_system, "STORAGE_BASE_DIR", str(storage))
+    found = storage / "3" / "12" / "proj"
+    edits = found / "B04_PreProcess/drainage/edits"
+    edits.mkdir(parents=True)
+    (edits / "pipe_points.json").write_text(
+        json.dumps({"route_signature": "sig-1", "points": POINTS}, ensure_ascii=False),
+        encoding="utf-8",
+    )
+    route = found / "B05_Profile/route"
+    route.mkdir(parents=True)
+    (route / "structures.json").write_text(
+        json.dumps({"revision": 4, "structures": STRUCTURES}, ensure_ascii=False),
+        encoding="utf-8",
+    )
+    snap.sync_snapshots(found)
+    return found
+
+
+def _points(root: Path) -> dict[str, Any]:
+    path = root / "B04_PreProcess/drainage/edits/pipe_points.json"
+    return json.loads(path.read_text(encoding="utf-8"))
+
+
+def _structures(root: Path) -> dict[str, Any]:
+    path = root / "B05_Profile/route/structures.json"
+    return json.loads(path.read_text(encoding="utf-8"))
+
+
+def test_관_지점_그_칸만_박스_관_가름(root):
+    before = _points(root)
+    copies.link(root, "pipe@100.0", "box_culvert", RV)
+    after = _points(root)
+    assert after["route_signature"] == "sig-1"
+    assert after["points"][1]["summary_item"] == RV  # 박스만
+    assert after["points"][0] == before["points"][0]  # 같은 측점 관 그대로
+    assert after["points"][2] == before["points"][2]
+    copies.link(root, "pipe@100.0__g9lq9uk", "pipe", RV)
+    pipe = _points(root)["points"][0]
+    assert pipe["group_items"] == {"grv6lny": PIPE, "g9lq9uk": RV}  # 다른 그룹 그대로
+    assert "summary_item" not in pipe
+    copies.link(root, "pipe@100.0__g9lq9uk", "pipe", None)  # 풀기
+    assert _points(root)["points"][0]["group_items"] == {"grv6lny": PIPE}
+    copies.link(root, "pipe@100.0", "box_culvert", None)
+    assert "summary_item" not in _points(root)["points"][1]
+
+
+def test_구조물_그_칸만_판번호(root):
+    copies.link(root, "st0", None, RV)
+    got = _structures(root)
+    assert got["revision"] == 5
+    st0, st1 = got["structures"]
+    assert st0["summary_item"] == RV and st0["chainage_m"] == 300
+    assert st1["summary_item"] == MS  # 다른 구조물 그대로
+    copies.link(root, "st1__gA", None, RV)
+    got = _structures(root)
+    assert got["revision"] == 6
+    assert got["structures"][1]["group_items"] == {"gA": RV}
+    assert got["structures"][1]["summary_item"] == MS
+
+
+def test_못_잇는_것(root):
+    with pytest.raises(LookupError):
+        copies.link(root, "pipe@999.0", "pipe", RV)
+    with pytest.raises(LookupError):
+        copies.link(root, "pipe@100.0", "ford_bridge", RV)
+    with pytest.raises(LookupError):
+        copies.link(root, "nope", None, RV)
+    with pytest.raises(ValueError):
+        copies.link(root, "#0", None, RV)
+
+
+def test_저장_뒤_사본_생기고_미연결에서_빠짐(root):
+    names = definition.read()["종류"]["pipe"]["이름"]
+    designs = [{"chainage_m": 200.0, "design": {"pipe_length_m": 12}}]
+    first = summary.pipe_summary(root, designs, names, 6.0)
+    assert any(u["id"] == "st0" for u in first["unlinked"])
+    assert any(u["id"] == "pipe@200.0" for u in first["unlinked"])
+    copies.link(root, "st0", None, RV)
+    copies.link(root, "pipe@200.0", "pipe", PIPE)
+    assert snap.safe_sync(root) == []
+    assert (snap.structures_dir(root) / snap.folder_name("st0") / snap.MANIFEST_NAME).is_file()
+    linked = snap.linked_snapshots(root)
+    assert {"st0", "pipe@200.0"} <= set(linked)
+    after = summary.pipe_summary(root, designs, names, 6.0)
+    assert not any(u["id"] == "st0" for u in after["unlinked"])
+    pipe200 = next((u for u in after["unlinked"] if u["id"] == "pipe@200.0"), None)
+    assert pipe200 is None or pipe200["slots"][0]["linked"]  # 본체는 연결됨
+
+
+def test_길_차례_링크가_먼저():
+    from M02_MasterTemplete.M02_Project_Items_Router import router
+
+    paths = [(route.path, sorted(route.methods)) for route in router.routes]
+    link = paths.index(("/api/projects/{project_id}/items/{copy}/link", ["PUT"]))
+    write = paths.index(("/api/projects/{project_id}/items/{folder}/{kind}", ["PUT"]))
+    assert link < write
+
+
+def test_화면_초안이면_막고_고르기_모달_다시_그림():
+    ui = (ROOT / "B08_Quantity/B08_Quantity_UI_Link.ts").read_text(encoding="utf-8")
+    assert "readPendingStructures(projectId) !== null" in ui
+    assert "readPendingPipes(projectId) !== null" in ui
+    assert 'import("@ui/ui_template_item_picker")' in ui
+    assert ".link(slot.copy, facility.facility, item)" in ui
+    api = (ROOT / "ui_template/ui_template_item_picker_project.ts").read_text(encoding="utf-8")
+    assert "/link`" in api
+    page = (ROOT / "B08_Quantity/B08_Quantity_UI_Summary.ts").read_text(encoding="utf-8")
+    assert "host.replaceWith(fresh)" in page and "unlinkedAt(unlinked, station)" in page
diff --git a/ui_template/ui_template_item_picker_project.ts b/ui_template/ui_template_item_picker_project.ts
index d20a9786f..bcf7b5cf0 100644
--- a/ui_template/ui_template_item_picker_project.ts
+++ b/ui_template/ui_template_item_picker_project.ts
@@ -9,6 +9,7 @@
  *     GET|PUT /api/projects/{id}/items/{폴더}/{부분}    → {종류, 판, 내용} · 고침은 {판, 내용}(판이 다르면 409)
  *     POST …/{폴더}/reapply                             재적용 → {폴더, 가져온날, 원본판, 덮임: [부분]}
  *     POST …/{폴더}/save-as {to, 경로, 이름}            개인에 저장 → {key, 열, 이름, summary_item}
+ *     PUT  …/{사본 id}/link {summary_item | null, facility} B08 바로 연결(154-2) — 그 시설 조합 칸 하나만 정본에 → {폴더, snapshot_failed}
  *     POST …/{폴더}/calc                                복사본만으로 계산 — 층 셈 꼴(줄 · 자재 · 기준합 · 반영합) + 알약 · 빠진입력(142-1)
  *   일위대가(39-1c · 142-1) — 모달 일위대가 카드(M02 카드 · 읽기 전용)가 `calcLabor` 로 셈 · 넣을 값 목록은 `fetchLogicInputs`
  * ========================================================================== */
@@ -19,7 +20,7 @@ import { fetchLogicInputs } from "../M02_MasterTemplete/M02_MasterTemplete_Labor
 import type { LaborDoc } from "../M02_MasterTemplete/M02_MasterTemplete_Labor_Api";
 import type { LaborCalc } from "../M02_MasterTemplete/M02_MasterTemplete_Labor_Calc";
 import type { ValueDoc } from "../M02_MasterTemplete/M02_Labor_Values_Model";
-import { layerOf, ownerOf, type PickerRow } from "./ui_template_item_picker_data";
+import { layerOf, ownerOf, type PickerRow, type SummaryItem } from "./ui_template_item_picker_data";
 
 /** 복사본 폴더 안 부분 — 25-1b 약속 그대로 */
 export type ProjectPart = "도면" | "면적" | "입력값" | "고른자재" | "일위대가";
@@ -134,6 +135,9 @@ export interface ProjectItems {
   calc: (folder: string) => Promise<ProjectCalc | null>;
   /** 복사본 셈 답 통째 — 모달 일위대가 카드(Labor_Detail)가 씀 · 못 하면 서버 까닭 그대로 던짐 */
   calcLabor: (folder: string) => Promise<CopyCalc>;
+  /** 바로 연결(154-2) — 시설 조합 칸 하나만 정본에(null = 풀기) · `facility` = 관 지점 종류 ·
+   * 돌려받음 = 못 만든 사본 폴더 · 못 하면 서버 까닭 그대로 던짐 */
+  link: (copy: string, facility: string | null, item: SummaryItem | null) => Promise<string[]>;
 }
 
 const clients = new Map<string, ProjectItems>();
@@ -237,6 +241,15 @@ export function projectItems(projectId: string): ProjectItems {
       };
     },
     calcLabor: (folder) => calcCopy(folder),
+    link: async (copy, facility, item) => {
+      const reply = await call(`${base}/${enc(copy)}/link`, {
+        method: "PUT",
+        body: JSON.stringify({ summary_item: item, facility }),
+      });
+      if (reply.status >= 300) throw new Error(reasonOf(reply));
+      forget(copy);
+      return (reply.body as { snapshot_failed?: string[] } | null)?.snapshot_failed ?? [];
+    },
   };
   clients.set(projectId, client);
   return client;
diff --git a/ui_template/ui_template_locale_b4.ts b/ui_template/ui_template_locale_b4.ts
index b1f33ebab..f7e155491 100644
--- a/ui_template/ui_template_locale_b4.ts
+++ b/ui_template/ui_template_locale_b4.ts
@@ -59,4 +59,18 @@ export const ui_locales_b4 = {
   ],
   B08_Quantity_Summary_Total: ["계", "Total"],
   B08_Quantity_Summary_Unlinked: ["미연결", "Unlinked"],
+  B08_Quantity_Link_Title: ["조합 연결", "Link combinations"],
+  B08_Quantity_Link_Body: ["본체", "Body"],
+  B08_Quantity_Link_Linked: ["연결됨", "Linked"],
+  B08_Quantity_Link_Pick: ["선택", "Select"],
+  B08_Quantity_Link_Saved: ["조합을 연결했습니다.", "Combination linked."],
+  B08_Quantity_Link_Failed: ["조합을 연결하지 못했습니다", "Failed to link the combination"],
+  B08_Quantity_Link_CopyFailed: [
+    "연결은 저장했으나 사본을 못 만듦",
+    "Linked, but the project copy could not be made",
+  ],
+  B08_Quantity_Link_Pending: [
+    "B05 · B06 에 저장 안 한 조작이 있습니다 — B05 · B06 [저장] 먼저 누른 뒤 연결하세요.",
+    "Unsaved edits in B05 · B06 — save there first, then link.",
+  ],
 } as const;