diff --git a/A00_Common/design/design_pipeline_page.ts b/A00_Common/design/design_pipeline_page.ts
index 53974f7fe..976fd250e 100644
--- a/A00_Common/design/design_pipeline_page.ts
+++ b/A00_Common/design/design_pipeline_page.ts
@@ -38,6 +38,7 @@ import type {
 import { useDesignStore, type DesignStoreValues } from "./design_store";
 import {
   followStructures,
+  placeOnLine,
   type FollowingStructure,
 } from "../../common_util/common_util_route_follow";
 import { fetchDetailPipePoints } from "../../B04_PreProcess/B04_PreProcess_Api_Fetch";
@@ -291,23 +292,42 @@ function createPagePipeline(
   const groundDeps = groundStageDeps(projectId);
   const crossStage = createCrossStage({ grid: groundDeps.grid }); // 미교차 넓힘 = 같은 지형 격자(349-0j)
   const haulStage = createHaulStage(projectId, () => savedSource().routeId ?? undefined);
+  const followStage = createFollowStage({
+    savedLine,
+    saved: () => {
+      const before = beforeDraft ?? facilitiesNow();
+      return {
+        pipes: before.pipes ?? savedPipes,
+        structures: before.structures ?? savedStructures,
+        alignment: savedEdits(),
+      };
+    },
+  });
+  /** 좌표 없는 관 · 구조물(세션 초안 — 배수유역도 · 구조물 목록이 정본 PUT 꼴로 씀)은 앞 노선 위 그 누가거리
+   *  자리에서 따라감 — 안 붙이면 측점이 그대로 남음(349-0u). */
+  const placed = (list: unknown, line: Vertex[]): unknown =>
+    Array.isArray(list)
+      ? placeOnLine(
+          list as FollowingStructure[],
+          line.map(([x, y]) => ({ x, y })),
+        )
+      : list;
   const pipe = createDesignPipeline({
     stages: {
       route: createRouteStage({
         minRadiusM: () => plan?.min_radius_m ?? 0,
         savedLine: () => plan && { line: savedLine()!, curves: savedCurves() },
       }),
-      follow: createFollowStage({
-        savedLine,
-        saved: () => {
-          const before = beforeDraft ?? facilitiesNow();
-          return {
-            pipes: before.pipes ?? savedPipes,
-            structures: before.structures ?? savedStructures,
-            alignment: savedEdits(),
-          };
-        },
-      }),
+      follow: (ctx) => {
+        const line = ctx.before.route?.line ?? savedLine() ?? [];
+        const { pipes, structures } = ctx.inputs;
+        const inputs = {
+          ...ctx.inputs,
+          pipes: placed(pipes, line),
+          structures: placed(structures, line),
+        };
+        return followStage({ ...ctx, inputs });
+      },
       stations: createStationsStage({ intervalM: options.stationIntervalM, types: () => types }),
       ground: createGroundStage(groundDeps),
       planline: createPlanlineStage({ savedBase: () => savedSource().base, savedLine }),
diff --git a/common_util/common_util_route_follow.ts b/common_util/common_util_route_follow.ts
index 3736d9f2d..6cbb10665 100644
--- a/common_util/common_util_route_follow.ts
+++ b/common_util/common_util_route_follow.ts
@@ -9,6 +9,7 @@
  *   - `followStructures` ↔ 파이썬 `common_util_route_follow.follow_structures`(+ 0 ~ 연장 자름 ·
  *     노선과 거리 · `STRUCTURE_ROUTE_DRIFT_MAX_M` 넘으면 「노선에서 멀어짐」 · 버리지 않음).
  *   - `projectOnPolyline` = shapely `LineString.project`(가장 가까운 첫 선분) · `distance`.
+ *   - `placeOnLine` 은 TS 만 — 좌표 없는 세션 초안(정본 PUT 꼴)을 따라가기 전 노선 위 자리로(349-0u).
  * 거울 시험 = resources/tester/test_344_2_route_pairs.py.
  * ========================================================================== */
 
@@ -46,6 +47,29 @@ export function projectOnPolyline(
   return best && walked > 0 ? { ...best, length_m: walked } : null;
 }
 
+/** 좌표 없는 관 · 구조물(세션 초안 = 정본 PUT 꼴 · 좌표 뺌)에 그 누가거리의 `line` 위 자리를 붙인 사본 —
+ *  좌표가 있거나 누가거리가 없으면 그대로(같은 객체). 연장 밖 누가거리는 끝 선분 위로 자름. */
+export function placeOnLine<S extends FollowingStructure>(
+  items: ReadonlyArray<S>,
+  line: ReadonlyArray<XY>,
+): S[] {
+  return items.map((item) => {
+    if ((item.x != null && item.y != null) || item.chainage_m == null) return item;
+    let walked = 0;
+    for (let index = 1; index < line.length; index += 1) {
+      const a = line[index - 1];
+      const b = line[index];
+      const span = Math.hypot(b.x - a.x, b.y - a.y);
+      if (span > 0 && (walked + span >= item.chainage_m || index === line.length - 1)) {
+        const t = Math.min(1, Math.max(0, (item.chainage_m - walked) / span));
+        return { ...item, x: a.x + (b.x - a.x) * t, y: a.y + (b.y - a.y) * t };
+      }
+      walked += span;
+    }
+    return item;
+  });
+}
+
 export interface FollowingPoint {
   chainage_m: number;
   x?: number | null;
diff --git a/resources/tester/helper_349_0u_follow_draft_xy.cjs b/resources/tester/helper_349_0u_follow_draft_xy.cjs
new file mode 100644
index 000000000..4b0d4e7ef
--- /dev/null
+++ b/resources/tester/helper_349_0u_follow_draft_xy.cjs
@@ -0,0 +1,232 @@
+/* PLAN 349-0u sub7 헬퍼 — 세션 관 · 구조물 초안에 좌표가 없어도(배수유역도 · 구조물 목록이 정본 PUT 꼴로 씀)
+ * 앞쪽 꺾임점을 끌면 follow 가 새 측점을 가게에 바로 · 되돌리기 = 초안 값 · 다시하기 = 다시 밂 · 조작 하나 =
+ * 묶음 한 번. 나머지 틀 = `helper_349_0d_follow_store.cjs` 그대로. 짝 = `test_349_0u_follow_draft_xy.py`. */
+const fs = require("fs");
+const path = require("path");
+const ts = require(path.join(__dirname, "..", "..", "config", "node_modules", "typescript"));
+const CATALOG = require("./helper_322_catalog_module.cjs");
+
+const ROOT = path.join(__dirname, "..", "..");
+const job = JSON.parse(fs.readFileSync(process.argv[2], "utf8"));
+
+function memoryStorage() {
+  const map = new Map();
+  return {
+    getItem: (key) => (map.has(key) ? map.get(key) : null),
+    setItem: (key, value) => map.set(key, String(value)),
+    removeItem: (key) => map.delete(key),
+    key: (index) => [...map.keys()][index] ?? null,
+    get length() {
+      return map.size;
+    },
+  };
+}
+globalThis.window = {
+  sessionStorage: memoryStorage(),
+  localStorage: memoryStorage(),
+  setTimeout,
+  clearTimeout,
+};
+
+// 흙 배분 서버 — 늦게 답함 · 끊기면 버림
+globalThis.fetch = (url, init) =>
+  new Promise((resolve, reject) => {
+    const timer = setTimeout(
+      () => resolve({ ok: true, json: async () => ({ haul_plan: { blocks: [], url } }) }),
+      20,
+    );
+    init.signal.addEventListener("abort", () => {
+      clearTimeout(timer);
+      reject(new Error("aborted"));
+    });
+  });
+
+const STUBS = {};
+const cache = new Map();
+function loadTs(full) {
+  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 (CATALOG.isCatalogRequest(request)) return CATALOG;
+    const key = Object.keys(STUBS).find((name) => request.endsWith(name));
+    if (key) return STUBS[key];
+    if (request.startsWith("@config/")) return { API_BASE_URL: "http://fake" };
+    if (request.startsWith("@util/"))
+      return loadTs(path.join(ROOT, "common_util", `${request.slice(6)}.ts`));
+    if (request.startsWith(".")) return loadTs(path.join(path.dirname(full), `${request}.ts`));
+    return require(request);
+  };
+  new Function("exports", "module", "require", js)(box.exports, box, localRequire);
+  return box.exports;
+}
+const load = (...parts) => loadTs(path.join(ROOT, ...parts));
+
+const sampler = load("common_util", "common_util_surface_sampler.ts");
+const bytes = fs.readFileSync(process.argv[3]);
+const grid = sampler.parseDtmGrid(
+  bytes.buffer.slice(bytes.byteOffset, bytes.byteOffset + bytes.length),
+);
+const local = { grid, design: "las" };
+
+STUBS["B05_Profile_Api_Replan"] = {
+  analysisTerrain: () => "las",
+  fetchRoutePlan: async () => ({
+    planned: job.line,
+    curves: job.curves,
+    min_radius_m: job.minRadius,
+    station_snap: job.stationSnap,
+  }),
+};
+STUBS["B05_Profile_Api_Structures"] = {
+  fetchStructures: async () => ({ structures: job.structures }),
+  fetchStructureTypes: async () => job.types,
+};
+STUBS["B05_Profile_Api_TerrainGrid"] = {
+  loadDesignTerrainGrid: async () => local,
+  groundStageDeps: () => ({ grid: () => local, remote: async () => [] }),
+};
+STUBS["B04_PreProcess_Api_Fetch"] = {
+  fetchDetailPipePoints: async () => ({
+    pipe_points: job.pipes.map((pipe) => ({ ...pipe, lonlat: [0, 0] })),
+  }),
+};
+STUBS["B06_Section_UI_Standard_Panel"] = {
+  effectiveStandardCross: () => job.standard,
+  readRockBoundaryDefault: () => -0.5,
+};
+
+const pageMod = load("A00_Common", "design", "design_pipeline_page.ts");
+const storeMod = load("A00_Common", "design", "design_store.ts");
+const alignment = load("B05_Profile", "logic", "B05_Profile_UI_Profile_Alignment.ts");
+const page = load("A00_Common", "b_page_state.ts");
+
+const tick = (ms = 0) => new Promise((resolve) => setTimeout(resolve, ms));
+const runs = () => globalThis.__aisloPipeline?.runs ?? [];
+/** 묶음이 조용해질 때까지 — 마지막 기록이 끝나고 새 기록이 더 안 생김(고리면 계속 생김). */
+async function quiet() {
+  let seen = -1;
+  for (let i = 0; i < 400; i += 1) {
+    await tick(15);
+    const last = runs()[runs().length - 1];
+    const count = runs().length;
+    if (count === seen && (!last || last.outcome !== "running")) return;
+    seen = count;
+  }
+  throw new Error("묶음이 조용해지지 않음");
+}
+const n = job.nodes.length;
+const draftOf = (nodes) => ({
+  nodes,
+  curveOn: Array(n).fill(true),
+  curveRadius: Array(n).fill(null),
+  curveLock: Array(n).fill(null),
+  curveArc: Array(n).fill(null),
+  stationSnap: job.stationSnap,
+});
+const shift = (index, dx, dy) =>
+  job.nodes.map((node, i) => (i === index ? [node[0] + dx, node[1] + dy] : node));
+const chainagesOf = (stations) => (stations ?? []).map((s) => s.chainageM);
+
+const P = "proj-3490u";
+const ids = (list) => (list ?? []).map((item) => [item.id ?? item.structure_id, item.chainage_m]);
+const lengthOf = (line) =>
+  (line ?? []).reduce(
+    (sum, p, i) => (i ? sum + Math.hypot(p[0] - line[i - 1][0], p[1] - line[i - 1][1]) : 0),
+    0,
+  );
+
+async function run() {
+  window.localStorage.setItem("frd_current_project_id", P);
+  const savedAlignment = job.detail.longitudinal.profile_alignment;
+  const savedBase = alignment.toAlignmentBase(savedAlignment);
+  const followed = [];
+  const link = {
+    pipelineSource: () => ({
+      base: savedBase,
+      edits: savedAlignment.edits,
+      detail: job.detail,
+      routeId: 7,
+    }),
+    adoptPipeline: (base, edits, draft) =>
+      pageMod.pipelineGrade(P, draft ? edits : savedAlignment.edits),
+    redraw: () => undefined,
+    side: null,
+  };
+  const store = storeMod.useDesignStore(P, null);
+  // 세션 초안 = 정본 PUT 꼴(좌표 뺌) — 배수유역도 · 구조물 목록이 열 때 · 고칠 때 씀
+  const draftPipes = job.pipes.map(({ x: _x, y: _y, ...pipe }) => pipe);
+  const draftStructures = job.structures.map(({ x: _x, y: _y, ...item }) => item);
+  store.set("pipes", draftPipes);
+  store.set("structures", draftStructures);
+  const bridge = pageMod.routeDraftBridge(P, link, {
+    stationIntervalM: job.interval,
+    onFacilitiesFollowed: (far) => followed.push(far),
+  });
+  pageMod.pipelineEarthwork(P, { conversion: job.conversion });
+  await quiet();
+  const pipe = pageMod.pagePipeline(P);
+  const savedLength = lengthOf(pipe.output("route")?.line);
+  const open = {
+    pipes: ids(store.get("pipes")),
+    structures: ids(store.get("structures")),
+    followed: [...followed],
+  };
+  const snapshot = {};
+  for (let i = 0; i < window.sessionStorage.length; i += 1) {
+    const key = window.sessionStorage.key(i);
+    snapshot[key] = window.sessionStorage.getItem(key);
+  }
+  const step = async (edit) => {
+    const mark = runs().length;
+    const before = followed.length;
+    bridge.edited(edit);
+    await quiet();
+    return {
+      runs: runs()
+        .slice(mark)
+        .map((r) => r.sources),
+      pipes: ids(store.get("pipes")),
+      structures: ids(store.get("structures")),
+      length: lengthOf(pipe.output("route")?.line),
+      followed: followed.slice(before),
+      blocked: pipe.blockedWrites,
+    };
+  };
+  // 앞쪽(시작 쪽) 꺾임점을 크게 끌어 놓음 — 그 뒤 관 · 구조물은 길이가 는 만큼 뒤로
+  const dragged = draftOf(shift(1, job.dx, job.dy));
+  const drag = await step(dragged);
+  // 되돌리기 — 사진첩이 세션을 되쓴 뒤 초안 없음
+  for (const key of Object.keys(snapshot)) window.sessionStorage.setItem(key, snapshot[key]);
+  for (let i = window.sessionStorage.length - 1; i >= 0; i -= 1) {
+    const key = window.sessionStorage.key(i);
+    if (!(key in snapshot)) window.sessionStorage.removeItem(key);
+  }
+  const undo = await step(null);
+  const redo = await step(dragged);
+  const undo2 = await step(null);
+  pageMod.disposePagePipeline(P);
+  return {
+    savedLength,
+    open,
+    drag,
+    undo,
+    redo,
+    undo2,
+    draftPipes: ids(draftPipes),
+    draftStructures: ids(draftStructures),
+  };
+}
+
+run()
+  .then((out) => {
+    process.stdout.write(JSON.stringify(out));
+    process.exit(0);
+  })
+  .catch((error) => {
+    process.stderr.write(String(error && error.stack ? error.stack : error));
+    process.exit(1);
+  });
diff --git a/resources/tester/test_349_0u_follow_draft_xy.py b/resources/tester/test_349_0u_follow_draft_xy.py
new file mode 100644
index 000000000..a7a9219b0
--- /dev/null
+++ b/resources/tester/test_349_0u_follow_draft_xy.py
@@ -0,0 +1,167 @@
+"""PLAN 349-0u sub7 — 세션 관 · 구조물 초안에 좌표가 없어도 노선 따라 측점이 밀림(349-0d 되살림).
+
+· 세션 초안 = 정본 PUT 꼴(좌표 뺌) — 앞쪽 꺾임점을 크게 끌면 그 뒤 관 · 구조물 측점이
+  길이 는 만큼 뒤로
+· 되돌리기 = 초안 값 그대로 · 다시하기 = 다시 밂 · 조작 하나 = 묶음 한 번 · 입력 쓰기 막음 0
+짝: `helper_349_0u_follow_draft_xy.cjs`(실제 TS 를 Node 로 · 서버 창구만 가짜 · 검증_sub7).
+"""
+
+from __future__ import annotations
+
+import csv
+import json
+import math
+import subprocess
+import sys
+import tempfile
+from pathlib import Path
+
+import pytest
+
+HERE = Path(__file__).resolve().parent
+ROOT = HERE.parents[1]
+if str(ROOT) not in sys.path:
+    sys.path.insert(0, str(ROOT))
+
+from B05_Profile.B05_Profile_Structures_Schema import structure_type_map  # noqa: E402
+from common_util.common_util_surface_sampler import dtm_grid_bytes  # noqa: E402
+from config.config_system_design import STANDARD_CROSS_SECTION  # noqa: E402
+
+pytestmark = pytest.mark.skipif(
+    not (ROOT / "config" / "node_modules" / "typescript").is_dir(),
+    reason="프론트엔드 의존성 미설치",
+)
+
+PROJECT = ROOT / "storage/1/3/6d3b2812-6d5a-4168-a932-40e4ae303d5a"  # 검증_sub7
+ROUTE = PROJECT / "B05_Profile/route"
+SECTION = PROJECT / "B06_Section"
+GRID = PROJECT / "B04_PreProcess/models/dtm_classification_smooth.npz"
+ONES = {g: {"loose": 1.0, "compacted": 1.0} for g in ("soil", "ripping_rock", "blasting_rock")}
+
+
+def _csv(path: Path) -> list[list[float]]:
+    with path.open(encoding="utf-8") as handle:
+        return [[float(r["x"]), float(r["y"])] for r in csv.DictReader(handle)]
+
+
+def _json(path: Path):
+    return json.loads(path.read_text(encoding="utf-8"))
+
+
+def _structure(sid: str, line: list[list[float]], ratio: float, off: float) -> dict:
+    """노선 위(off 0) · 옆(off m) 점 구조물 — 저장 노선 누가거리 · 좌표."""
+    lengths = [math.dist(a, b) for a, b in zip(line, line[1:])]
+    at = sum(lengths) * ratio
+    walked = 0.0
+    for (a, b), length in zip(zip(line, line[1:]), lengths):
+        if walked + length >= at:
+            t = (at - walked) / length
+            dx, dy = (b[0] - a[0]) / length, (b[1] - a[1]) / length
+            x, y = a[0] + dx * length * t - dy * off, a[1] + dy * length * t + dx * off
+            break
+        walked += length
+    return {
+        "structure_id": sid,
+        "type_id": "erosion_check",
+        "placement": "point",
+        "chainage_m": round(at, 2),
+        "start_m": None,
+        "end_m": None,
+        "x": x,
+        "y": y,
+        "options": {},
+    }
+
+
+@pytest.fixture(scope="module")
+def r() -> dict:
+    if not (GRID.is_file() and (SECTION / "longitudinal/longitudinal.json").is_file()):
+        pytest.skip("검증_sub7 없음")
+    curves = _json(ROUTE / "planned_route_curves.json")
+    sections = sorted(
+        (_json(p) for p in (SECTION / "cross_sections").glob("cross_*.json")),
+        key=lambda s: s["chainage_m"],
+    )
+    pipes = _json(PROJECT / "B04_PreProcess/drainage/edits/pipe_points.json")["points"]
+    line = _csv(ROUTE / "planned_route.csv")
+    structures = [_structure("s-near", line, 0.5, 0.0), _structure("s-far", line, 0.7, 30.0)]
+    job = {
+        "line": line,
+        "structures": structures,
+        "nodes": _csv(ROUTE / "planned_route_nodes.csv"),
+        "curves": [
+            {k: c[k] for k in ("start", "apex", "end", "radius_m")} for c in curves["curves"]
+        ],
+        "stationSnap": bool(curves.get("station_snap")),
+        "minRadius": curves["min_radius_m"],
+        "interval": 20.0,
+        "types": [
+            {"type_id": t.type_id, "group": t.group, "placement": t.placement}
+            for t in structure_type_map().values()
+        ],
+        "pipes": pipes,
+        "dx": -60.0,
+        "dy": 0.0,
+        "standard": STANDARD_CROSS_SECTION,
+        "conversion": ONES,
+        "detail": {
+            "longitudinal": _json(SECTION / "longitudinal/longitudinal.json"),
+            "cross_sections": sections,
+        },
+    }
+    with tempfile.TemporaryDirectory() as folder:
+        path = Path(folder) / "job.json"
+        path.write_text(json.dumps(job), encoding="utf-8")
+        grid = Path(folder) / "grid.bin"
+        grid.write_bytes(dtm_grid_bytes(GRID))
+        proc = subprocess.run(  # noqa: S603 — 고정 실행 파일
+            ["node", str(HERE / "helper_349_0u_follow_draft_xy.cjs"), str(path), str(grid)],
+            capture_output=True,
+            text=True,
+            encoding="utf-8",
+            timeout=300,
+        )
+    assert proc.returncode == 0, proc.stderr
+    return json.loads(proc.stdout)
+
+
+def _moved(before: list, after: list) -> list[float]:
+    return [b[1] - a[1] for a, b in zip(before, after)]
+
+
+def test_앞쪽_꺾임점_끌기_측점_밀림(r):
+    d = r["drag"]
+    assert d["runs"] == [["route"]], d["runs"]
+    assert d["blocked"] == 0
+    grow = d["length"] - r["savedLength"]
+    assert grow > 5, grow  # 앞쪽 길이 늚
+    pipes = _moved(r["draftPipes"], d["pipes"])
+    assert len(d["pipes"]) == len(r["draftPipes"])
+    # 끈 꼭짓점 뒤 관 = 길이 는 만큼(정수 m 맞춤 · 1 m 안) — 대부분 그 뒤
+    tail = [m for (_, c), m in zip(r["draftPipes"], pipes) if c > r["draftPipes"][2][1]]
+    assert tail and all(abs(m - grow) <= 1.0 for m in tail), (grow, pipes)
+    s = _moved(r["draftStructures"], d["structures"])
+    assert all(abs(m - grow) <= 1.0 for m in s), (grow, s)
+    assert len(d["followed"]) == 1
+
+
+def test_되돌리기_초안_값(r):
+    for u in (r["undo"], r["undo2"]):
+        assert u["runs"] == [["route"]], u["runs"]
+        assert u["pipes"] == r["draftPipes"]
+        assert u["structures"] == r["draftStructures"]
+        assert abs(u["length"] - r["savedLength"]) < 1e-6
+        assert u["blocked"] == 0
+
+
+def test_다시하기_다시_밂(r):
+    d, again = r["drag"], r["redo"]
+    assert again["runs"] == [["route"]], again["runs"]
+    assert again["pipes"] == d["pipes"] and again["structures"] == d["structures"]
+    assert again["blocked"] == 0
+
+
+def test_열기만_가게_그대로(r):
+    o = r["open"]
+    assert o["pipes"] == r["draftPipes"] and o["structures"] == r["draftStructures"]
+    assert o["followed"] == []