diff --git a/A00_Common/design/logic/design_calc_node.ts b/A00_Common/design/logic/design_calc_node.ts
index 779411db1..78ed19b3c 100644
--- a/A00_Common/design/logic/design_calc_node.ts
+++ b/A00_Common/design/logic/design_calc_node.ts
@@ -12,7 +12,8 @@
  *          excavation?: { pipes: [{ diameter_mm }] · walls: [{ height_m · average_thickness_m ·
  *          has_foundation }] } ·
  *          cross_design?: { standard: 표준 횡단(config 위에 저장분 덮은 한 벌) ·
- *          stations: [{ samples · design_elevation_m · options: 파이썬 `compute_cross_design` 키 }] } ·
+ *          stations: [{ samples · design_elevation_m · options: 파이썬 `compute_cross_design` 키 ·
+ *          chainage_m? }] · facilities?: { pipes · structures }(시설 구간 · 511-B B-4) } ·
  *          berm?: { structures: 구조물 정본 목록 · chainages: [측점 m] } ·
  *          rebase? · carry?(노선 바뀐 [저장] · `design_calc_node_carry.ts`) ·
  *          stages?(묶음 단계 · `design_calc_node_stages.ts` · 511-B) ·
@@ -26,9 +27,9 @@
 
 import { readFileSync, writeFileSync } from "node:fs";
 import { bermSpansFromStructures, bermSpecAt } from "@util/common_util_berm_spans";
-import type { BermSpec } from "@util/common_util_cross_berm";
 import { computeCrossDesign } from "@util/common_util_cross_design";
 import type { CrossDesignOptions, CrossGroundSample } from "@util/common_util_cross_design";
+import type { CulvertPipePoint } from "@util/common_util_culvert_sets";
 import { pipeTrenchWidthM, wallTrenchAreaM2, wallTrenchWidthM } from "@util/common_util_excavation";
 import { computeMassHaul, massHaulPayload } from "@util/common_util_mass_haul";
 import type { MassHaulResult } from "@util/common_util_mass_haul";
@@ -37,6 +38,12 @@ import type { RoutePoint } from "../../../B05_Profile/B05_Profile_Api_Fetch";
 import { buildCorridor } from "../../../B05_Profile/B05_Profile_UI_Corridor_Build";
 import { corridorHash, serialize } from "../../../B05_Profile/B05_Profile_UI_Corridor_Envelope";
 import type { SectionDetailResponse } from "../../../B06_Section/B06_Section_Api_Fetch";
+import {
+  facilityAt,
+  facilityRanges,
+  type FacilityStructure,
+} from "../../../B06_Section/logic/B06_Section_Cross_Enforce";
+import { crossOptions } from "../../../B06_Section/logic/B06_Section_Cross_Save";
 import {
   applyStructureAreaRows,
   extraWallRows,
@@ -85,59 +92,14 @@ interface CalcInputs extends FollowInputs, CarryInputs, TrialInputs, StagesInput
       samples: CrossGroundSample[];
       design_elevation_m: number | null;
       options: Record<string, unknown>;
+      /** 시설 구간을 얹을 누가거리(`facilities` 와 함께 · 511-B B-4) */
+      chainage_m?: number;
     }>;
+    /** 관 지점 · 구조물 정본 → 측점마다 포장 · 기울임 · 세월교 하강(`facilityRanges` · C3) */
+    facilities?: { pipes: CulvertPipePoint[]; structures: FacilityStructure[] };
   };
 }
 
-/** 파이썬 `compute_cross_design` 키 → TS 짝 키(거울 시험 test_b06_cross_design_mirror 표와 같음). */
-const CROSS_OPTION_KEYS: Record<string, keyof CrossDesignOptions> = {
-  ground_type: "groundType",
-  section_mode: "sectionMode",
-  ditch_side: "ditchSide",
-  ditch_type: "ditchType",
-  paved: "paved",
-  rock_boundary_offset_m: "rockBoundaryOffsetM",
-  two_stage_slope: "twoStageSlope",
-  cut_slope_ratio: "cutSlopeRatio",
-  ditch_enabled: "ditchEnabled",
-  ditch_choice: "ditchChoice",
-  surface_drop_m: "surfaceDropM",
-  plan_radius_m: "planRadiusM",
-  curve_outer_side: "curveOuterSide",
-  curve_widening_m: "curveWideningM",
-  shoulder_extend_left_m: "shoulderExtendLeftM",
-  shoulder_extend_right_m: "shoulderExtendRightM",
-  tilted: "tilted",
-  tilt_pct: "tiltPct",
-};
-
-/** 파이썬 BermSpec(NamedTuple → dict) → TS BermSpec. */
-function bermOf(value: unknown): BermSpec | null {
-  if (!value || typeof value !== "object") return null;
-  const berm = value as Record<string, number | null>;
-  return {
-    widthM: berm.width_m as number,
-    intervalM: berm.interval_m as number,
-    slopeDeg: berm.slope_deg as number,
-    depthM: berm.depth_m as number,
-    depthLeftM: berm.depth_left_m ?? null,
-    depthRightM: berm.depth_right_m ?? null,
-  };
-}
-
-function crossOptions(
-  raw: Record<string, unknown>,
-  standard: CrossDesignOptions["standard"],
-): CrossDesignOptions {
-  const options: Record<string, unknown> = { standard };
-  for (const [key, value] of Object.entries(raw)) {
-    if (key === "berm") options.berm = bermOf(value);
-    else if (key in CROSS_OPTION_KEYS) options[CROSS_OPTION_KEYS[key]] = value;
-    else throw new Error(`모르는 횡단 설계 키: ${key}`);
-  }
-  return options as unknown as CrossDesignOptions;
-}
-
 /** 한 번 돌림 — 같은 id 는 한 번만 셈(memo) · 앞 id 는 `need` 로 · 단계 id 는 약속(기다림). */
 async function runDesignCalc(run: readonly string[], inputs: CalcInputs) {
   const memo = new Map<string, unknown>();
@@ -208,9 +170,15 @@ async function runDesignCalc(run: readonly string[], inputs: CalcInputs) {
     // 측점마다 TS 짝(`computeCrossDesign`) — 못 세우면 그 자리 { error }(파이썬은 ValueError 로 되던짐).
     "cross.design": () => {
       const batch = inputs.cross_design;
+      const ranges = batch?.facilities
+        ? facilityRanges(batch.facilities.pipes, batch.facilities.structures)
+        : null;
       return (batch?.stations ?? []).map((station) => {
         try {
-          const options = crossOptions(station.options, batch!.standard);
+          const options = {
+            ...crossOptions(station.options, batch!.standard),
+            ...(ranges && station.chainage_m != null ? facilityAt(ranges, station.chainage_m) : {}),
+          };
           return computeCrossDesign(station.samples, station.design_elevation_m, options);
         } catch (error) {
           return { error: error instanceof Error ? error.message : String(error) };
diff --git a/B05_Profile/B05_Profile_Router_Confirm.py b/B05_Profile/B05_Profile_Router_Confirm.py
index 53ab71b6c..2a7aa7ec0 100644
--- a/B05_Profile/B05_Profile_Router_Confirm.py
+++ b/B05_Profile/B05_Profile_Router_Confirm.py
@@ -110,11 +110,11 @@ async def sync_uphill_overrides_into_designs(
     """
     # 지연 import — B06 라우터 모듈 로드는 이 함수가 실제 불릴 때만 필요하다.
     from B06_Section.B06_Section_Engine_Design import (
-        compute_cross_design,
         curve_widening_args,
         stored_shoulder_extend,
         stored_tilt,
     )
+    from B06_Section.B06_Section_Engine_Design_Node import DesignJob, compute_cross_designs
     from B06_Section.B06_Section_Repository import get_cross_section_designs
     from B06_Section.B06_Section_Repository_Bulk import merge_cross_section_designs
     from B06_Section.B06_Section_Router_Design import (
@@ -164,20 +164,17 @@ async def sync_uphill_overrides_into_designs(
         longitudinal_json = json.loads(longitudinal_path.read_text(encoding="utf-8"))
         preloaded = (longitudinal_path, longitudinal_json, pavement_suggestions(longitudinal_json))
         ford_drops = ford_surface_drops(root)
-        out: list[tuple[float, dict[str, Any]]] = []
+        picked: list[tuple[float, dict[str, Any], bool, DesignJob]] = []
         for chainage, design, next_mode, side in jobs:
             samples, design_elevation, pavement_suggested, cross_record = read_cross_design_inputs(
                 root, longitudinal_file_path, float(chainage), preloaded
             )
-            next_design = compute_cross_design(
-                samples,
-                design_elevation,
+            options = dict(
                 ground_type=str(design.get("ground_type", "soil")),
                 section_mode=next_mode,
                 ditch_side=side,
                 ditch_type=str(design.get("ditch_type") or "standard"),  # 측구 끔 = None 저장분
                 paved=bool(design.get("paved", False)),
-                standard=stored_standard,
                 rock_boundary_offset_m=design.get("rock_boundary_offset_m"),
                 two_stage_slope=bool(design.get("two_stage_slope", False)),
                 cut_slope_ratio=stored_cut_slope(design),  # 측점별 깎기 경사(429 ⑤)
@@ -189,13 +186,24 @@ async def sync_uphill_overrides_into_designs(
                 **stored_shoulder_extend(design),  # 노견 확장(139-6)
                 **stored_tilt(design),  # 물넘이 · 맹암거 자리 측구 없음 · 기울기(286-2 · 287-4)
             )
+            picked.append(
+                (float(chainage), design, pavement_suggested, (samples, design_elevation, options))
+            )
+        # 측점 묶음 Node 한 번(TS 짝 · 511-B B-4) · 못 세운 측점 = 저장분 그대로(옛 ValueError 자리)
+        results = compute_cross_designs([job for *_rest, job in picked], stored_standard)
+        out: list[tuple[float, dict[str, Any]]] = []
+        for (chainage, design, pavement_suggested, _job), next_design in zip(
+            picked, results, strict=True
+        ):
+            if next_design is None:
+                continue
             next_design["status"] = design.get("status", "provisional")
             next_design["pavement_suggested"] = design.get("pavement_suggested", pavement_suggested)
             # 사용자 조작값 승계(조절 · 소단 · 깎기 경사 · 글) — `enforce_design_lines` 와 같음
             for key in USER_TOUCHED_KEYS:
                 if design.get(key) is not None:
                     next_design[key] = design[key]
-            out.append((float(chainage), next_design))
+            out.append((chainage, next_design))
         return out
 
     # 쓰기도 한 문장으로 — 행마다 내면 원격 DB 왕복이 측점 수만큼 난다(건당 24.5ms).
diff --git a/B06_Section/B06_Section_Api_Fetch.ts b/B06_Section/B06_Section_Api_Fetch.ts
index 42f2182c0..5832adb4a 100644
--- a/B06_Section/B06_Section_Api_Fetch.ts
+++ b/B06_Section/B06_Section_Api_Fetch.ts
@@ -18,7 +18,6 @@
 
 import { API_BASE_URL, API_TIMEOUT_MS } from "@config/config_frontend";
 import { t as L } from "@ui/ui_template_locale";
-import type { CrossDesignChoice } from "./B06_Section_Cross_Design_Session";
 import type {
   CrossDesign,
   CrossSection,
@@ -239,67 +238,6 @@ export async function getCompanyStandard(
   );
 }
 
-/** 계획선 편집 델타(자동 선형 대비 계획고 델타 + 종단곡선 반경). B05 편집 스토어와 같은 모양. */
-export interface ProfileAlignmentEdits {
-  station_offsets: Record<string, number>;
-  curve_radii: Record<string, number>;
-}
-
-/**
- * 계획선 편집 프리뷰 결과 — **바뀌는 것만** 온다.
- * 횡단 지반선 원시 샘플은 계획고와 무관해 그대로이므로 싣지 않는다(응답 1MB → 수십 KB).
- */
-export interface CrossDesignPreviewResponse {
-  status: string;
-  /** 유토곡선이 읽는 설계 필드만 담긴 부분 갱신값(설계선 좌표 등은 오지 않는다). */
-  designs: Array<{ chainage_m: number; design: Partial<CrossDesign> }>;
-}
-
-/**
- * 계획선 편집을 반영해 **계획선 + 전 측점 횡단 설계**를 다시 계산해 받는다(서버 저장 없음).
- *
- * B05에서 계획고를 끄는 동안 횡단 단면적이 함께 움직여야 횡단 기준 유토곡선이 따라온다.
- * 측점마다 따로 부르면 수십 번 왕복하므로 한 번에 계산한다. 영속화는 각 페이지의
- * 임시저장·확정이 맡는다.
- */
-export async function previewCrossDesigns(
-  projectId: string,
-  routeId: number,
-  edits: ProfileAlignmentEdits,
-  standardCrossSection?: StandardCrossSection,
-  options?: {
-    /** true면 설계 전체(설계선 좌표 포함)를 받는다 — B06 진입 시 stale 일괄 재계산용. */
-    fullDesigns?: boolean;
-    /** 측점별 암 경계 오프셋 세션값(chainage 키 → m). DB 저장분보다 우선한다. */
-    rockBoundaryOffsets?: Record<string, number>;
-    /** 측점별 소단 제원(chainage 키 → 폭·간격·기울기). 값이 없는 측점은 소단 없음. */
-    berms?: Record<
-      string,
-      { width_m: number; interval_m: number; slope_deg: number; depth_m?: number }
-    >;
-    /** 측점별 암 절토 경사비(chainage 키 → 1:n 의 n). 0 은 「표준값을 씀」이다. */
-    cutSlopeRatios?: Record<string, number>;
-    /** 측점별 카드 선택(chainage 키 → 지반 · 측구 · 복합경사 …) 세션값 — 저장분 위에 얹음(439). */
-    designChoices?: Record<string, CrossDesignChoice>;
-  },
-): Promise<CrossDesignPreviewResponse> {
-  return requestJson<CrossDesignPreviewResponse>(
-    `/projects/${projectId}/sections/${routeId}/cross-design/preview`,
-    {
-      method: "POST",
-      body: JSON.stringify({
-        ...edits,
-        standard_cross_section: standardCrossSection ?? null,
-        full_designs: options?.fullDesigns ?? false,
-        rock_boundary_offsets: options?.rockBoundaryOffsets ?? null,
-        berms: options?.berms ?? null,
-        cut_slope_ratios: options?.cutSlopeRatios ?? null,
-        design_choices: options?.designChoices ?? null,
-      }),
-    },
-  );
-}
-
 /** B07 횡단 수량표 한 장(138-4 · 서버 `cross_quantity_sheet`) — 값 · 글 · 칸 배치. */
 export interface CrossQuantitySheet {
   quantity_table: Record<string, number | null>;
diff --git a/B06_Section/B06_Section_Cross_Refresh.ts b/B06_Section/B06_Section_Cross_Refresh.ts
index c8659360c..d41bb1491 100644
--- a/B06_Section/B06_Section_Cross_Refresh.ts
+++ b/B06_Section/B06_Section_Cross_Refresh.ts
@@ -10,7 +10,7 @@
  *
  * 그래서 설계 계산은 `common_util_cross_design.ts`(파이썬 `B06_Section_Engine_Design.py`
  * 의 미러)로 옮겼고, 여기서는 **입력을 모아 전 측점을 돌리고 제자리 반영**만 한다.
- * 서버 프리뷰는 선형 저장분이 없어 계획고를 못 푸는 **옛 데이터 폴백**으로만 남는다.
+ * 옛 데이터 서버 프리뷰(`/cross-design/preview`)는 걷음(511-B B-4) — 선형 저장분이 없으면 셈 없음.
  *
  * ⚠ 두 벌 계산 주의 — TS 미러(`common_util_cross_design*.ts`)와 파이썬 엔진
  *   (`B06_Section_Engine_Design.py`·`B06_Section_Engine_Areas.py`)은 한 벌이다.
@@ -26,11 +26,9 @@
 
 import { computeCrossDesign } from "@util/common_util_cross_design";
 import type { CrossDesignOptions, StandardCrossSectionSpec } from "@util/common_util_cross_design";
-import { previewCrossDesigns } from "./B06_Section_Api_Fetch";
 import type { CrossSection, SectionDetailResponse } from "./B06_Section_Api_Fetch";
 import {
   bermSpecAt,
-  readBermSpans,
   readCutSlopeSession,
   readRockBoundarySession,
 } from "./B06_Section_UI_Page_Persist";
@@ -50,12 +48,7 @@ import {
   readBermDepths,
   readShoulderExtends,
 } from "./B06_Section_Cross_Design_Session";
-import {
-  effectiveStandardCross,
-  readRockBoundaryDefault,
-  readStandardCrossSession,
-  readStoredStandard,
-} from "./B06_Section_UI_Standard_Panel";
+import { effectiveStandardCross, readRockBoundaryDefault } from "./B06_Section_UI_Standard_Panel";
 import {
   buildAlignment,
   planElevationAt,
@@ -90,11 +83,6 @@ export interface CrossRefreshInput {
   edits: CrossRefreshEdits;
   /** 화면이 쥔 계획선(측점 한 벌 · 342-1) — 없으면 종단도가 맡긴 선 → 저장분 + `edits`. */
   alignment?: ProfileAlignment | null;
-  /**
-   * 결과를 **아직 써도 되는지** 묻는다(false면 반영하지 않는다). 로컬 계산은 즉시 끝나
-   * 늦은 응답이 없지만, 옛 데이터 폴백(서버 프리뷰)에서는 여전히 문지기가 필요하다.
-   */
-  shouldApply?: () => boolean;
 }
 
 /** 계산이 만들지 않는 **사용자 값** — 목록 한 벌 = `logic/B06_Section_Design_Keys`(서버 Node 입구도 · 472-6). */
@@ -176,7 +164,7 @@ export async function refreshCrossDesigns(input: CrossRefreshInput): Promise<num
   useStationKeys(input.projectId, input.routeId, input.detail); // 세션 고침을 이 측점 목록으로 읽음(344-3)
   await withPipeOptions(input.detail, input.projectId, true); // 관 옵션을 고친 뒤도 면적이 따라옴(387-4b)
   const before = new Map(sections.map((section) => [section, JSON.stringify(section.design)]));
-  if (!refreshLocally(input)) await refreshFromServer(input);
+  refreshLocally(input); // 선형 저장분 · 표준값이 없으면 셈 없음(옛 서버 폴백 걷음 · 511-B B-4)
   // 구조물이 선 측점은 폐회로 면적이 정본이다 — **이 자리 한 곳**에서 늘 다시 얹는다(387-4 · 카드 그리기는
   // 안 얹음 · 설계가 그대로여도 조정창 4축 · 구조물 제원이 바뀌면 면적이 바뀜 · 6 ms/67 측점).
   // 계산 자리 quantity = server 면 잠잠 뒤 서버 값만 · 밀린 부름은 안 얹음(새 부름이 얹음 · 511-A)
@@ -219,33 +207,6 @@ function readRockOffsets(projectId: string, routeId: number): Map<number, number
   return offsets;
 }
 
-/**
- * 소단 구간을 **측점별 제원**으로 편다 — 서버는 측점키로 받기 때문이다.
- * 구간 자체는 세션에 그대로 두어 「어디부터 어디까지 놓았나」를 잃지 않는다.
- */
-function bermPayload(
-  projectId: string,
-  routeId: number,
-  detail: SectionDetailResponse,
-): Record<string, BermSessionSpec & Partial<Record<`berm_depth_${Side}_m`, number>>> {
-  const spans = readBermSpans(projectId, routeId);
-  const out: Record<string, BermSessionSpec & Partial<Record<`berm_depth_${Side}_m`, number>>> = {};
-  if (!spans.length) return out;
-  const depthAt = bermDepthReader(projectId, routeId);
-  for (const section of detail.cross_sections) {
-    const spec = bermSpecAt(spans, section.chainage_m);
-    if (!spec) continue;
-    const design = (section.design ?? {}) as Record<string, unknown>;
-    const sides: Partial<Record<`berm_depth_${Side}_m`, number>> = {};
-    for (const side of SIDES) {
-      const own = depthAt(section.chainage_m, design, side);
-      if (own !== null) sides[`berm_depth_${side}_m`] = own;
-    }
-    out[rockKey(section.chainage_m).toFixed(2)] = { ...spec, ...sides };
-  }
-  return out;
-}
-
 type Side = "left" | "right";
 const SIDES: Side[] = ["left", "right"];
 
@@ -506,46 +467,3 @@ function refreshLocally(input: CrossRefreshInput): number[] | null {
   }
   return updated;
 }
-
-/** 옛 데이터 폴백 — 선형 저장분이 없어 브라우저가 계획고를 풀 수 없을 때만 쓴다. */
-async function refreshFromServer(input: CrossRefreshInput): Promise<number[]> {
-  const { projectId, routeId, detail, edits, shouldApply } = input;
-  const choices = crossDesignChoices(projectId, routeId);
-  const response = await previewCrossDesigns(
-    projectId,
-    routeId,
-    edits,
-    // 세션 고침 → 저장분(세션에 안 베낌 · 272) — 둘 다 없으면 서버 config
-    readStandardCrossSession(projectId) ?? readStoredStandard(projectId) ?? undefined,
-    {
-      fullDesigns: true,
-      rockBoundaryOffsets: readRockBoundarySession(projectId, routeId),
-      berms: bermPayload(projectId, routeId, detail),
-      // 측점별 암 절토 경사도 세션값이라 함께 싣는다 — 안 실으면 서버 폴백에서만
-      // 사용자 경사가 조용히 표준값으로 되돌아간다(2026-09-07).
-      cutSlopeRatios: readCutSlopeSession(projectId, routeId),
-      // 카드 단추 선택(지반 · 측구 · 복합경사)도 — 안 실으면 폴백에서만 단추가 안 먹음(439) · 열쇠 = 측점 자리
-      designChoices: Object.fromEntries(
-        detail.cross_sections.flatMap((section) => {
-          const choice = choices.get(rockKey(section.chainage_m));
-          return choice ? [[section.chainage_m.toFixed(3), choice]] : [];
-        }),
-      ),
-    },
-  );
-  if (shouldApply && !shouldApply()) return [];
-  const designByChainage = new Map(
-    response.designs.map((entry) => [entry.chainage_m.toFixed(3), entry.design]),
-  );
-  const updated: number[] = [];
-  for (const section of detail.cross_sections) {
-    const next = designByChainage.get(section.chainage_m.toFixed(3));
-    if (!next) continue;
-    section.design = preserveUserFields(
-      next as NonNullable<CrossSection["design"]>,
-      section.design,
-    );
-    updated.push(section.chainage_m);
-  }
-  return updated;
-}
diff --git a/B06_Section/B06_Section_Engine_Design_Node.py b/B06_Section/B06_Section_Engine_Design_Node.py
index 2f67bc54a..8cf5a24a0 100644
--- a/B06_Section/B06_Section_Engine_Design_Node.py
+++ b/B06_Section/B06_Section_Engine_Design_Node.py
@@ -52,10 +52,59 @@ def _python(job: DesignJob, standard: dict[str, Any] | None) -> dict[str, Any] |
         return None
 
 
+# 시설 구간(포장 · 기울임 · 세월교 하강) = TS `facilityRanges` — (프로젝트 뿌리, 측점 누가거리)
+Facilities = tuple[Path, list[float]]
+
+
+def facility_inputs(project_root: Path) -> dict[str, list[dict[str, Any]]]:
+    """TS `facilityRanges` 입력 — 관 = 지금 노선에 얹은 관 지점(`route_pipe_points`) · 구조물 정본.
+
+    못 읽은 쪽은 빈 목록(파이썬 `pavement_ranges` · `ford_surface_drops` 의 비치명 태도 그대로)."""
+    from dataclasses import asdict
+
+    from B05_Profile.B05_Profile_Engine_Sections import route_pipe_points
+    from B05_Profile.B05_Profile_Structures_Repository import load_structures
+
+    try:
+        pipes = [asdict(point) for point in route_pipe_points(project_root)]
+    except Exception:  # noqa: BLE001 — 정본을 못 읽어도 설계 계산은 이어 간다
+        logger.exception("B06 관 지점을 읽지 못했습니다 (시설 구간 없음으로 본다)")
+        pipes = []
+    try:
+        structures = [s.model_dump(mode="json") for s in load_structures(str(project_root))[1]]
+    except Exception:  # noqa: BLE001
+        logger.exception("B06 구조물 정본을 읽지 못했습니다 (포장 · 맹암거 구간 없음으로 본다)")
+        structures = []
+    return {"pipes": pipes, "structures": structures}
+
+
+def _python_facility(root: Path) -> Any:
+    """Node 를 못 부를 때 — 파이썬 구간 짝(`Router_Design_Ranges` · `Engine_Tilt`)."""
+    from B06_Section.B06_Section_Engine_Tilt import tilt_args, tilt_ranges
+    from B06_Section.B06_Section_Router_Design_Ranges import (
+        ford_drop_at,
+        ford_surface_drops,
+        paved_at,
+        pavement_ranges,
+    )
+
+    paved, tilts, drops = pavement_ranges(root), tilt_ranges(root), ford_surface_drops(root)
+    return lambda c: {
+        "paved": paved_at(c, paved),
+        "surface_drop_m": ford_drop_at(c, drops),
+        **tilt_args(c, tilts),
+    }
+
+
 def compute_cross_designs(
-    jobs: list[DesignJob], standard: dict[str, Any] | None
+    jobs: list[DesignJob],
+    standard: dict[str, Any] | None,
+    facilities: Facilities | None = None,
 ) -> list[dict[str, Any] | None]:
-    """측점 묶음 횡단 설계 — 차례 그대로 결과 · None = 못 세움(파이썬 ValueError 자리)."""
+    """측점 묶음 횡단 설계 — 차례 그대로 결과 · None = 못 세움(파이썬 ValueError 자리).
+
+    `facilities` = (뿌리, 누가거리) 면 포장 · 기울임 · 세월교 하강을 TS 구간이 측점마다 얹음
+    (511-B B-4 · C3)."""
     if not jobs:
         return []
     stations = [
@@ -69,12 +118,18 @@ def compute_cross_designs(
         }
         for samples, elevation, options in jobs
     ]
-    results = run_calc(
-        ["cross.design"],
-        {"cross_design": {"standard": full_standard(standard), "stations": stations}},
-    )
+    batch: dict[str, Any] = {"standard": full_standard(standard), "stations": stations}
+    if facilities is not None:
+        root, chainages = facilities
+        batch["facilities"] = facility_inputs(root)
+        for station, chainage in zip(stations, chainages, strict=True):
+            station["chainage_m"] = chainage
+    results = run_calc(["cross.design"], {"cross_design": batch})
     if results is None:
         logger.warning("Node 횡단 설계 실패 — 파이썬 짝으로 셈(%d 측점)", len(jobs))
+        if facilities is not None:
+            at = _python_facility(facilities[0])
+            jobs = [(s, z, {**o, **at(c)}) for (s, z, o), c in zip(jobs, facilities[1])]
         return [_python(job, standard) for job in jobs]
     return [None if "error" in row else row for row in results["cross.design"]]
 
diff --git a/B06_Section/B06_Section_Router.py b/B06_Section/B06_Section_Router.py
index 76195d937..18b0648c4 100644
--- a/B06_Section/B06_Section_Router.py
+++ b/B06_Section/B06_Section_Router.py
@@ -14,7 +14,6 @@ from fastapi import APIRouter, Depends, Request
 from fastapi.responses import JSONResponse, Response
 
 from B03_FileInput.B03_FileInput_Repository import get_project_storage_relative_path
-from B05_Profile.B05_Profile_Engine_Grade_Profile import rebuild_alignment_profile
 from B05_Profile.B05_Profile_Engine_Sections import (
     cross_files_in_order,
     relabel_pipe_stations,
@@ -35,15 +34,9 @@ from B06_Section.B06_Section_Repository import (
     insert_cross_sections,
     list_recent_company_projects,
 )
-from B06_Section.B06_Section_Router_Design import (
-    PREVIEW_DESIGN_FIELDS as _PREVIEW_DESIGN_FIELDS,
-)
 from B06_Section.B06_Section_Router_Design import (
     attach_default_designs as _attach_default_designs,
 )
-from B06_Section.B06_Section_Router_Design import (
-    recompute_designs_for_alignment as _recompute_designs_for_alignment,
-)
 from B06_Section.B06_Section_Router_Design import (
     stored_standard_cross_section as _stored_standard_cross_section,
 )
@@ -55,8 +48,6 @@ from B06_Section.B06_Section_Schema import (
     CompanyStandardListResponse,
     CompanyStandardProject,
     CompanyStandardResponse,
-    CrossDesignPreviewRequest,
-    CrossDesignPreviewResponse,
     HaulEquipmentLimit,
     SectionContextResponse,
     SectionDetailResponse,
@@ -482,104 +473,3 @@ async def regenerate_route_sections(
             status_code=500,
             content={"status": "error", "message": "종횡단 재생성 처리 중 오류가 발생했습니다."},
         )
-
-
-def _with_design_choices(
-    designs: list[dict[str, Any]], choices: dict[str, dict[str, Any]] | None
-) -> list[dict[str, Any]]:
-    """카드 선택 세션값을 저장분 위에 얹은 행 목록(439) — 뒤 행이 같은 측점 앞 행을 덮음."""
-    stored = {round(float(r["chainage_m"]), 3): r.get("design") or {} for r in designs}
-    picked = {round(float(key), 3): choice for key, choice in (choices or {}).items()}
-    return designs + [
-        {"chainage_m": key, "design": {**stored.get(key, {}), **choice}}
-        for key, choice in picked.items()
-    ]
-
-
-@router.post(
-    "/{project_id}/sections/{route_id}/cross-design/preview",
-    response_model=CrossDesignPreviewResponse,
-)
-async def preview_cross_designs(
-    project_id: UUID, route_id: int, request: CrossDesignPreviewRequest
-) -> CrossDesignPreviewResponse | JSONResponse:
-    """계획선 편집 델타로 계획선과 전 측점 횡단 설계를 다시 계산해 돌려준다(저장 없음).
-
-    ⚠ **평상시 조작 경로가 아니다**(2026-09-03 이후). 계획선을 만지는 동안의 재계산은
-    브라우저가 직접 한다(`common_util/common_util_cross_design.ts`) — 조작 중 계산이
-    서버로 나가면 왕복이 조작 속도를 지배하기 때문이다(사용자 확정). 이 엔드포인트는
-    선형 저장분이 없어 브라우저가 계획고를 풀 수 없는 **옛 데이터 폴백**으로만 남는다
-    (`B06_Section_Cross_Refresh.refreshCrossDesigns`).
-
-    영속화는 각 페이지의 임시저장·확정이 맡는다.
-    """
-    pool = get_db_pool()
-    try:
-        async with pool.acquire() as connection:
-            longitudinal_row = await get_longitudinal_section(connection, project_id, route_id)
-            if not longitudinal_row:
-                return JSONResponse(
-                    status_code=404,
-                    content={"status": "error", "message": "종횡단 상세 결과가 없습니다."},
-                )
-            stored_path = await get_project_storage_relative_path(connection, project_id)
-            designs = await get_cross_section_designs(connection, route_id)
-            source = await get_route_generation_source(connection, project_id, route_id)
-        designs = _with_design_choices(designs, request.design_choices)
-        project_root = Path(resolve_stored_project_path(stored_path))
-        detail = await asyncio.to_thread(
-            _read_section_detail,
-            project_root,
-            str(longitudinal_row["longitudinal_file_path"]),
-            (source or {}).get("route_data_path"),
-        )
-
-        def rebuild() -> None:
-            alignment, profile = rebuild_alignment_profile(detail["longitudinal"], request.edits())
-            detail["longitudinal"]["profile_alignment"] = alignment
-            detail["longitudinal"]["design_profiles"] = [profile]
-            _recompute_designs_for_alignment(
-                detail["longitudinal"],
-                detail["cross_sections"],
-                designs,
-                request.standard_cross_section,
-                request.rock_boundary_offsets,
-                project_root,
-                request.berms,
-                request.cut_slope_ratios,
-            )
-
-        await asyncio.to_thread(rebuild)
-        # 계획고를 끄는 동안 오가는 값이라 기본은 **유토곡선이 실제로 읽는 필드만** 싣는다.
-        # 지반선 샘플·설계선 좌표(design_line)·선형 구조를 다 담으면 1MB가 넘어 편집이 굼떠진다
-        # (2026-08-03 사용자 지적). 계획선 자체는 화면이 이미 같은 규칙으로 계산해 들고 있다.
-        # `full_designs`(B06 진입 시 stale 일괄 재계산)일 때만 설계 전체를 1회 싣는다 —
-        # 측점별 순차 호출 N번보다 왕복 1번이 훨씬 싸다(2026-08-04 사용자 확인).
-        return CrossDesignPreviewResponse(
-            designs=[
-                {
-                    "chainage_m": section.get("chainage_m"),
-                    "design": section["design"]
-                    if request.full_designs
-                    else {
-                        key: section["design"].get(key)
-                        for key in _PREVIEW_DESIGN_FIELDS
-                        if key in section["design"]
-                    },
-                }
-                for section in detail["cross_sections"]
-                if section.get("design")
-            ],
-        )
-    except FileNotFoundError as exc:
-        return JSONResponse(status_code=404, content={"status": "error", "message": str(exc)})
-    except (OSError, ValueError, json.JSONDecodeError) as exc:
-        return JSONResponse(status_code=400, content={"status": "error", "message": str(exc)})
-    except Exception:
-        logger.exception(
-            "B06 횡단 설계 프리뷰 실패: project_id=%s route_id=%s", project_id, route_id
-        )
-        return JSONResponse(
-            status_code=500,
-            content={"status": "error", "message": "횡단 설계 프리뷰 계산 중 오류가 발생했습니다."},
-        )
diff --git a/B06_Section/B06_Section_Router_Design.py b/B06_Section/B06_Section_Router_Design.py
index 44500ae1a..43f34f940 100644
--- a/B06_Section/B06_Section_Router_Design.py
+++ b/B06_Section/B06_Section_Router_Design.py
@@ -11,7 +11,6 @@ from typing import Any
 from B05_Profile.B05_Profile_Engine_Sections import find_cross_file
 from B06_Section.B06_Section_Engine_Design import (
     ROUTE_CARRY_KEYS,
-    compute_cross_design,
     curve_widening_args,
     stored_shoulder_extend,
     stored_tilt,
@@ -42,20 +41,6 @@ from common_util.common_util_cross_berm import (
 from common_util.common_util_route_profile import design_elevation_from_longitudinal
 from config.config_system import STANDARD_ROCK_BOUNDARY_DEFAULT_OFFSET_M
 
-PREVIEW_DESIGN_FIELDS = (
-    "ground_type",
-    "roadbed_width_m",
-    "cut_area_m2",
-    "cut_soil_area_m2",
-    "cut_rock_area_m2",
-    "cut_rock_kind",
-    "fill_area_m2",
-    "fill_ground_slope",
-    "design_elevation_m",
-    "slope_unclosed",
-)
-
-
 # 사용자 조작값 — 다시 계산해도 그대로 승계한다. **이 목록이 서버의 유일한 한 벌이다.**
 #
 # 브라우저 쪽 짝은 `B06_Section_Cross_Refresh.ts` 의 `PRESERVED_KEYS` 다(+ `status`·
@@ -375,34 +360,37 @@ def attach_default_designs(
     project_root: Path | None = None,
     standard: dict[str, Any] | None = None,
 ) -> None:
+    """설계 없는 측점 = 기본값 프리뷰 — Node 묶음 한 번(TS 짝 · 시설 구간 TS · 511-B B-4)."""
     modes = default_section_modes(longitudinal)
     pavement = pavement_suggestions(longitudinal)
-    paved_ranges = pavement_ranges(project_root) if project_root else []
-    tilts = tilt_ranges(project_root)
-    ford_drops = ford_surface_drops(project_root)
+    jobs: list[tuple[dict[str, Any], float, DesignJob]] = []
     for section in cross_sections:
         if section.get("design"):
             continue
-        try:
-            chainage = float(section.get("chainage_m", 0.0))
-            suggested = pavement.get(round(chainage, 3), False)
-            design = compute_cross_design(
-                section.get("samples", []),
-                design_elevation_from_longitudinal(longitudinal, chainage),
-                ground_type="ripping_rock",
-                section_mode=modes.get(round(chainage, 3), "left_cut"),
-                # 포장은 사용자 구간 지정만 켠다 — 경사 제안은 경고로만 남는다(2026-08-28).
-                paved=paved_at(chainage, paved_ranges),
-                standard=standard,
-                rock_boundary_offset_m=STANDARD_ROCK_BOUNDARY_DEFAULT_OFFSET_M,
-                surface_drop_m=ford_drop_at(chainage, ford_drops),
-                **curve_widening_args(section),
-                **tilt_args(chainage, tilts),
-            )
-            design.update(status="provisional", pavement_suggested=suggested)
-            section["design"] = design
-        except (ValueError, KeyError):
+        chainage = float(section.get("chainage_m", 0.0))
+        options = dict(
+            ground_type="ripping_rock",
+            section_mode=modes.get(round(chainage, 3), "left_cut"),
+            # 포장은 사용자 구간 지정만 켠다 — 경사 제안은 경고로만 남는다(2026-08-28) · 구간 = TS
+            rock_boundary_offset_m=STANDARD_ROCK_BOUNDARY_DEFAULT_OFFSET_M,
+            **curve_widening_args(section),
+        )
+        elevation = design_elevation_from_longitudinal(longitudinal, chainage)
+        jobs.append((section, chainage, (section.get("samples", []), elevation, options)))
+    if not jobs:
+        return
+    designs = compute_cross_designs(
+        [job for *_rest, job in jobs],
+        standard,
+        (project_root, [c for _s, c, _j in jobs]) if project_root else None,
+    )
+    for (section, chainage, _job), design in zip(jobs, designs, strict=True):
+        if design is None:
             continue
+        design.update(
+            status="provisional", pavement_suggested=pavement.get(round(chainage, 3), False)
+        )
+        section["design"] = design
 
 
 def stored_cut_slope(stored: dict[str, Any]) -> float | None:
@@ -445,96 +433,6 @@ def stored_berm(stored: dict[str, Any]) -> BermSpec | None:
     return berm_from(stored.get("berm"), stored)
 
 
-def recompute_designs_for_alignment(
-    longitudinal: dict[str, Any],
-    cross_sections: list[dict[str, Any]],
-    stored_designs: list[dict[str, Any]],
-    standard: dict[str, Any] | None,
-    rock_boundary_offsets: dict[str, float] | None = None,
-    project_root: Path | None = None,
-    berms: dict[str, dict[str, float]] | None = None,
-    cut_slope_ratios: dict[str, float] | None = None,
-) -> None:
-    modes = default_section_modes(longitudinal)
-    pavement = pavement_suggestions(longitudinal)
-    paved_ranges = pavement_ranges(project_root) if project_root else []
-    tilts = tilt_ranges(project_root)
-    ford_drops = ford_surface_drops(project_root)
-    stored_by_chainage = {
-        round(float(record["chainage_m"]), 3): (record.get("design") or {})
-        for record in stored_designs
-    }
-    # 측점별 암 절토 경사(2026-09-07) — 0 은 「표준값을 씀」이라 저장분을 덮어 지운다.
-    session_cut_slopes: dict[float, float] = {}
-    for raw_key, ratio in (cut_slope_ratios or {}).items():
-        try:
-            session_cut_slopes[round(float(raw_key), 3)] = float(ratio)
-        except (TypeError, ValueError):
-            continue
-    session_offsets: dict[float, float] = {}
-    for raw_key, offset in (rock_boundary_offsets or {}).items():
-        try:
-            session_offsets[round(float(raw_key), 3)] = float(offset)
-        except (TypeError, ValueError):
-            continue
-    # 측점별 소단 제원 — 값이 없는 측점은 소단 없음(종전 설계 그대로).
-    session_berms: dict[float, BermSpec] = {}
-    for raw_key, spec in (berms or {}).items():
-        try:
-            parsed = berm_from(spec, spec if isinstance(spec, dict) else {})  # 쪽 깊이도(194-1)
-            if parsed is not None:
-                session_berms[round(float(raw_key), 3)] = parsed
-        except (TypeError, ValueError):
-            continue
-    for section in cross_sections:
-        chainage = float(section.get("chainage_m", 0.0))
-        key = round(chainage, 3)
-        stored = stored_by_chainage.get(key) or {}
-        suggested = pavement.get(key, False)
-        try:
-            design = compute_cross_design(
-                section.get("samples", []),
-                design_elevation_from_longitudinal(longitudinal, chainage),
-                ground_type=str(stored.get("ground_type") or "ripping_rock"),
-                section_mode=str(stored.get("section_mode") or modes.get(key, "left_cut")),
-                ditch_side=stored.get("ditch_side"),
-                ditch_type=str(stored.get("ditch_type") or "standard"),
-                paved=paved_at(chainage, paved_ranges),
-                standard=standard,
-                rock_boundary_offset_m=session_offsets.get(
-                    key,
-                    stored.get("rock_boundary_offset_m", STANDARD_ROCK_BOUNDARY_DEFAULT_OFFSET_M),
-                ),
-                two_stage_slope=bool(stored.get("two_stage_slope", False)),
-                cut_slope_ratio=(
-                    (session_cut_slopes[key] or None)
-                    if key in session_cut_slopes
-                    else stored_cut_slope(stored)
-                ),
-                ditch_enabled=stored.get("ditch_enabled"),
-                ditch_choice=stored.get("ditch_choice"),
-                surface_drop_m=ford_drop_at(chainage, ford_drops),
-                berm=session_berms.get(key) or stored_berm(stored),
-                **curve_widening_args(section),
-                **stored_shoulder_extend(stored),  # 노견 확장(139-6)
-                **tilt_args(chainage, tilts),
-            )
-        except (ValueError, KeyError):
-            continue
-        design.update(status="provisional", pavement_suggested=suggested)
-        if stored.get("display_half_width_m") is not None:
-            design["display_half_width_m"] = stored["display_half_width_m"]
-        if stored.get("inlet_structure") is not None:
-            design["inlet_structure"] = stored["inlet_structure"]
-        if stored.get("basin_adjust") is not None:
-            design["basin_adjust"] = stored["basin_adjust"]
-        if stored.get("ford_adjust") is not None:
-            design["ford_adjust"] = stored["ford_adjust"]
-        if stored.get("box_adjust") is not None:
-            design["box_adjust"] = stored["box_adjust"]
-        section["design"] = design
-
-
 def compute_default_designs(
     project_root: Path,
     longitudinal_file_path: str,
@@ -562,10 +460,7 @@ def compute_default_designs(
     cross_dir = longitudinal_path.parent.parent / "cross_sections"
     default_modes = default_section_modes(longitudinal)
     pavement = pavement_suggestions(longitudinal)
-    paved_ranges = pavement_ranges(root)
-    tilts = tilt_ranges(root)
-    ford_drops = ford_surface_drops(root)
-    results: list[tuple[float, dict[str, Any]]] = []
+    entries: list[tuple[float, dict[str, Any], DesignJob]] = []
     for chainage_m in chainages:
         cross = (crosses or {}).get(round(chainage_m, 3))
         cross_path = find_cross_file(cross_dir, chainage_m)
@@ -577,12 +472,9 @@ def compute_default_designs(
             samples = cross.get("samples")
             if not isinstance(samples, list):
                 continue
-            suggested = pavement.get(round(chainage_m, 3), False)
             user = (carried or {}).get(round(chainage_m, 3)) or {}
             rock_offset = user.get("rock_boundary_offset_m")
-            design = compute_cross_design(
-                samples,
-                design_elevation_from_longitudinal(longitudinal, chainage_m),
+            options = dict(
                 ground_type=str(user.get("ground_type") or "ripping_rock"),
                 # 손 상단측(같은 자리로 넘긴 단면 유형 · 측구 방향 · 요구 275-3) · 없으면 상단측
                 section_mode=user.get("section_mode")
@@ -594,27 +486,32 @@ def compute_default_designs(
                 ),
                 ditch_side=user.get("ditch_side"),
                 ditch_type=str(user.get("ditch_type") or "standard"),
-                # 포장은 사용자 구간 지정만 켠다 — 경사 제안은 경고로만 남는다(2026-08-28).
-                paved=paved_at(chainage_m, paved_ranges),
-                standard=standard,
+                # 포장 · 기울임 · 세월교 하강 = 구간 · 관 지점(TS `facilityRanges` · 511-B B-4)
                 rock_boundary_offset_m=(
                     STANDARD_ROCK_BOUNDARY_DEFAULT_OFFSET_M if rock_offset is None else rock_offset
                 ),
                 two_stage_slope=bool(user.get("two_stage_slope", False)),
                 cut_slope_ratio=stored_cut_slope(user),
                 ditch_choice=user.get("ditch_choice"),
-                surface_drop_m=ford_drop_at(chainage_m, ford_drops),
                 berm=stored_berm(user),
                 **curve_widening_args(cross),
                 **stored_shoulder_extend(user),  # 노선 저장이 넘긴 사면 쉬프트(417)
-                **tilt_args(chainage_m, tilts),
             )
-            for key in ("berm", "cut_slope_ratio_user", *ROUTE_CARRY_KEYS):
-                if user.get(key) is not None:
-                    design[key] = user[key]
-            design["status"] = "provisional"
-            design["pavement_suggested"] = suggested
-            results.append((chainage_m, design))
+            elevation = design_elevation_from_longitudinal(longitudinal, chainage_m)
         except (ValueError, KeyError, OSError, json.JSONDecodeError):
             continue
+        entries.append((chainage_m, user, (samples, elevation, options)))
+    designs = compute_cross_designs(
+        [job for *_rest, job in entries], standard, (root, [c for c, _u, _j in entries])
+    )
+    results: list[tuple[float, dict[str, Any]]] = []
+    for (chainage_m, user, _job), design in zip(entries, designs, strict=True):
+        if design is None:
+            continue  # 계획고 부재 등 — 조용히 건너뜀(확정을 막지 않음)
+        for key in ("berm", "cut_slope_ratio_user", *ROUTE_CARRY_KEYS):
+            if user.get(key) is not None:
+                design[key] = user[key]
+        design["status"] = "provisional"
+        design["pavement_suggested"] = pavement.get(round(chainage_m, 3), False)
+        results.append((chainage_m, design))
     return results
diff --git a/B06_Section/B06_Section_Schema.py b/B06_Section/B06_Section_Schema.py
index 6587430e6..d8e0e5e9c 100644
--- a/B06_Section/B06_Section_Schema.py
+++ b/B06_Section/B06_Section_Schema.py
@@ -367,50 +367,3 @@ class SectionDetailResponse(BaseModel):
     # longitudinal_sections.data.mass_haul.balloon_offsets에 확정 시점에 저장된 값이며,
     # 브라우저가 바뀌어도 같은 자리에 뜨도록 진입 시 프론트 캐시의 씨앗으로 내려보낸다.
     balloon_offsets: dict[str, list[float]] | None = None
-
-
-class CrossDesignPreviewRequest(BaseModel):
-    """계획선 편집 델타로 **전 측점 횡단 설계를 다시 계산**해 달라는 요청(저장 없음).
-
-    B05에서 계획고를 끌면 측점별 횡단 단면적이 함께 바뀌어야 횡단 기준 유토곡선이
-    따라 움직인다. 측점마다 따로 부르면 수십 번 왕복하므로 한 번에 계산한다.
-    사용자가 이미 지정한 지반유형·단면유형·측구·암 경계는 그대로 유지하고
-    **계획고만 새 선형으로 바꿔** 재계산한다.
-    """
-
-    model_config = ConfigDict(extra="forbid")
-
-    station_offsets: dict[str, float] = Field(default_factory=dict)
-    curve_radii: dict[str, float] = Field(default_factory=dict)
-    # B06 설정 패널 편집값(있으면 그 표준단면으로 계산).
-    standard_cross_section: dict[str, Any] | None = None
-    # True면 설계 전체(설계선 좌표 포함)를 돌려준다 — B06 진입 시 stale 설계 일괄 재계산용.
-    # B05 편집 프리뷰(기본 False)는 유토곡선 필드만 받아 응답을 가볍게 유지한다.
-    full_designs: bool = False
-    # 측점별 암 경계 오프셋 세션값(chainage 키 → m). B06이 확정 전 세션에만 들고 있는
-    # 오프셋을 재계산에 반영하기 위한 값 — 없으면 DB 저장분을 쓴다.
-    rock_boundary_offsets: dict[str, float] | None = None
-    # 측점별 소단 제원(chainage 키 → {width_m, interval_m, slope_deg, depth_m}). 위와 같은 성격으로,
-    # 사용자가 구간에 놓은 소단을 확정 전에도 재계산에 반영한다(계획서 3-9).
-    # 값이 없는 측점은 소단 없음 — 종전 설계 그대로다.
-    berms: dict[str, dict[str, float]] | None = None
-    # 측점별 암 절토 경사비(chainage 키 → 1:n 의 n). 위와 같은 성격 — 확정 전 세션값을
-    # 재계산에 반영한다(2026-09-07). **0 은 「표준값을 씀」**(되돌리기)이다.
-    cut_slope_ratios: dict[str, float] | None = None
-    # 측점별 카드 선택(chainage 키 → 지반 · 단면 · 측구 · 복합경사). 위와 같은 성격 — 저장분 위에 얹음(439).
-    design_choices: dict[str, dict[str, Any]] | None = None
-
-    def edits(self) -> dict[str, Any]:
-        return {"station_offsets": self.station_offsets, "curve_radii": self.curve_radii}
-
-
-class CrossDesignPreviewResponse(BaseModel):
-    """계획선 편집 프리뷰 결과 — **바뀌는 것만** 담는다.
-
-    계획고를 끄는 동안 오가는 값이라 **유토곡선이 실제로 읽는 설계 필드만** 담는다.
-    지반선 샘플·설계선 좌표·선형 구조까지 실으면 1MB가 넘어 편집이 굼떠지고
-    (2026-08-03 사용자 지적), 계획선 자체는 화면이 같은 규칙으로 이미 계산해 들고 있다.
-    """
-
-    status: str = "ok"
-    designs: list[dict[str, Any]] = Field(default_factory=list)
diff --git a/B06_Section/logic/B06_Section_Cross_Save.ts b/B06_Section/logic/B06_Section_Cross_Save.ts
new file mode 100644
index 000000000..b9cf7a1d8
--- /dev/null
+++ b/B06_Section/logic/B06_Section_Cross_Save.ts
@@ -0,0 +1,337 @@
+/* =============================================================================
+ * B06_Section_Cross_Save.ts
+ * [저장] · [확정] 서버 횡단 한 바퀴(PLAN 511-B B-4 · 서버 Node `cross.enforce`) — 저장 입력으로 모든 측점 설계선
+ * 다시 냄 → 미교차 넓힘(DTM 격자) → 포장 구간 → 세월교 노면 하강. 차례 · 승계 · 입력 = 파이썬 그대로.
+ *
+ *   ⚠ ① 짝 — `B06_Section_Router_Design.py` `enforce_design_lines` · `enforce_pavement_ranges` ·
+ *     `enforce_ford_surface_drops` + `B06_Section_Engine_SampleExtend.py` `extend_unclosed_sections`
+ *     (서버 `_enforce_stored_designs` 차례 · DTM 아닌 지표면은 파이썬 길) · 저장분 입력 읽기
+ *     (`stored_cut_slope` · `berm_from` · `stored_shoulder_extend` · `stored_tilt` · `curve_widening_args`) ·
+ *     계획고 = `design_elevation_from_longitudinal`. 거울 시험 `test_511_b4_cross_save_mirror.py`.
+ *   crossOptions = 파이썬 `compute_cross_design` 키 → TS 짝 키(Node `cross.design` 도 이것).
+ * 순수 — 화면 · fetch · 세션 없음.
+ * ========================================================================== */
+
+import { bermSpansFromStructures, bermSpecAt } from "@util/common_util_berm_spans";
+import {
+  BERM_DEFAULT_DEPTH_M,
+  BERM_DEFAULT_INTERVAL_M,
+  BERM_DEFAULT_SLOPE_DEG,
+  BERM_DEFAULT_WIDTH_M,
+  type BermSpec,
+} from "@util/common_util_cross_berm";
+import { computeCrossDesign } from "@util/common_util_cross_design";
+import type { CrossDesignOptions, CrossGroundSample } from "@util/common_util_cross_design";
+import type { CulvertPipePoint } from "@util/common_util_culvert_sets";
+import type { DtmGrid } from "@util/common_util_surface_sampler";
+import {
+  extendUnclosed,
+  type CrossGroundPoint,
+  type ExtendInfo,
+  type UnclosedDesign,
+} from "../../B05_Profile/logic/B05_Profile_Sections_Ground";
+import { USER_TOUCHED_KEYS } from "./B06_Section_Design_Keys";
+import { facilityAt, facilityRanges, type FacilityStructure } from "./B06_Section_Cross_Enforce";
+
+type Raw = Record<string, unknown>;
+
+/** 파이썬 `compute_cross_design` 키 → TS 짝 키(거울 시험 test_b06_cross_design_mirror 표와 같음). */
+const CROSS_OPTION_KEYS: Record<string, keyof CrossDesignOptions> = {
+  ground_type: "groundType",
+  section_mode: "sectionMode",
+  ditch_side: "ditchSide",
+  ditch_type: "ditchType",
+  paved: "paved",
+  rock_boundary_offset_m: "rockBoundaryOffsetM",
+  two_stage_slope: "twoStageSlope",
+  cut_slope_ratio: "cutSlopeRatio",
+  ditch_enabled: "ditchEnabled",
+  ditch_choice: "ditchChoice",
+  surface_drop_m: "surfaceDropM",
+  plan_radius_m: "planRadiusM",
+  curve_outer_side: "curveOuterSide",
+  curve_widening_m: "curveWideningM",
+  shoulder_extend_left_m: "shoulderExtendLeftM",
+  shoulder_extend_right_m: "shoulderExtendRightM",
+  tilted: "tilted",
+  tilt_pct: "tiltPct",
+};
+
+/** 파이썬 BermSpec(NamedTuple → dict) → TS BermSpec. */
+function bermOf(value: unknown): BermSpec | null {
+  if (!value || typeof value !== "object") return null;
+  const berm = value as Record<string, number | null>;
+  return {
+    widthM: berm.width_m as number,
+    intervalM: berm.interval_m as number,
+    slopeDeg: berm.slope_deg as number,
+    depthM: berm.depth_m as number,
+    depthLeftM: berm.depth_left_m ?? null,
+    depthRightM: berm.depth_right_m ?? null,
+  };
+}
+
+/** 파이썬 키 입력 → 엔진 입력(모르는 키 = 던짐). */
+export function crossOptions(
+  raw: Raw,
+  standard: CrossDesignOptions["standard"],
+): CrossDesignOptions {
+  const options: Raw = { standard };
+  for (const [key, value] of Object.entries(raw)) {
+    if (key === "berm") options.berm = bermOf(value);
+    else if (key in CROSS_OPTION_KEYS) options[CROSS_OPTION_KEYS[key]] = value;
+    else throw new Error(`모르는 횡단 설계 키: ${key}`);
+  }
+  return options as unknown as CrossDesignOptions;
+}
+
+const isNum = (value: unknown): value is number =>
+  typeof value === "number" && Number.isFinite(value);
+
+/** 파이썬 `stored_cut_slope` — 측점별 암 절토 경사 · 없거나 0 = null. */
+const storedCutSlope = (design: Raw): number | null =>
+  isNum(design.cut_slope_ratio_user) && design.cut_slope_ratio_user > 0
+    ? design.cut_slope_ratio_user
+    : null;
+
+/** 파이썬 `berm_from` — 소단 제원 dict + 쪽마다 옮긴 깊이 → BermSpec(python 키). */
+function bermFrom(spec: unknown, sides: Raw): Raw | null {
+  if (!spec || typeof spec !== "object" || Array.isArray(spec)) return null;
+  const own = (side: string): number | null => {
+    const value = sides[`berm_depth_${side}_m`];
+    return isNum(value) ? Math.max(value, 0) : null;
+  };
+  const s = spec as Raw;
+  const field = (key: string, fallback: number): number => Number(s[key] ?? fallback);
+  const out = {
+    width_m: field("width_m", BERM_DEFAULT_WIDTH_M),
+    interval_m: field("interval_m", BERM_DEFAULT_INTERVAL_M),
+    slope_deg: field("slope_deg", BERM_DEFAULT_SLOPE_DEG),
+    depth_m: Math.max(field("depth_m", BERM_DEFAULT_DEPTH_M), 0),
+  };
+  if (!Object.values(out).every(Number.isFinite)) return null; // 파이썬 TypeError · ValueError
+  return { ...out, depth_left_m: own("left"), depth_right_m: own("right") };
+}
+
+const storedBerm = (design: Raw): Raw | null => bermFrom(design.berm, design);
+
+/** 파이썬 `stored_shoulder_extend` — 없거나 음수 = 0. */
+const storedShoulder = (design: Raw): Raw =>
+  Object.fromEntries(
+    (["left", "right"] as const).map((side) => {
+      const value = design[`shoulder_extend_${side}_m`];
+      return [`shoulder_extend_${side}_m`, isNum(value) ? Math.max(value, 0) : 0];
+    }),
+  );
+
+/** 파이썬 `stored_tilt`. */
+const storedTilt = (design: Raw): { tilted: boolean; tilt_pct: number | null } => ({
+  tilted: Boolean(design.tilted),
+  tilt_pct: isNum(design.tilt_pct) ? design.tilt_pct : null,
+});
+
+/** 파이썬 `curve_widening_args`. */
+const curveArgs = (section: Raw): Raw => ({
+  plan_radius_m: section.plan_radius_m ?? null,
+  curve_outer_side: section.curve_outer_side ?? null,
+  curve_widening_m: section.curve_widening_m ?? null,
+});
+
+/** 파이썬 `design_elevation_from_longitudinal` — 계획선 표본 선형 보간 · 범위 밖 끝값 · 없으면 null. */
+export function elevationAt(
+  samples: ReadonlyArray<{ chainage_m?: unknown; elevation_m?: unknown }>,
+  chainageM: number,
+): number | null {
+  const rows = samples.filter((s) => isNum(s.elevation_m) && isNum(s.chainage_m)) as Array<{
+    chainage_m: number;
+    elevation_m: number;
+  }>;
+  if (!rows.length) return null;
+  if (chainageM <= rows[0].chainage_m) return rows[0].elevation_m;
+  const last = rows[rows.length - 1];
+  if (chainageM >= last.chainage_m) return last.elevation_m;
+  for (let index = 1; index < rows.length; index += 1) {
+    const [previous, current] = [rows[index - 1], rows[index]];
+    if (chainageM > current.chainage_m) continue;
+    const span = current.chainage_m - previous.chainage_m;
+    if (span <= 0) return current.elevation_m;
+    const ratio = (chainageM - previous.chainage_m) / span;
+    return previous.elevation_m + (current.elevation_m - previous.elevation_m) * ratio;
+  }
+  return last.elevation_m;
+}
+
+/** 저장분 공통 입력(파이썬 넷이 같은 꼴로 모음) — 포장 · 하강 · 기울임은 부르는 자리가 덮음. */
+function storedOptions(design: Raw, section: Raw, rockDefaultM: number): Raw {
+  return {
+    ground_type: String(design.ground_type || "ripping_rock"),
+    section_mode: String(design.section_mode || "left_cut"),
+    ditch_side: design.ditch_side ?? null,
+    ditch_type: String(design.ditch_type || "standard"),
+    paved: Boolean(design.paved),
+    rock_boundary_offset_m:
+      "rock_boundary_offset_m" in design ? design.rock_boundary_offset_m : rockDefaultM,
+    two_stage_slope: Boolean(design.two_stage_slope),
+    cut_slope_ratio: storedCutSlope(design),
+    ditch_enabled: design.ditch_enabled ?? null,
+    ditch_choice: design.ditch_choice ?? null,
+    berm: storedBerm(design),
+    ...curveArgs(section),
+    ...storedShoulder(design),
+  };
+}
+
+/** 측점 하나(서버 상세 꼴) — 쓰는 칸만. */
+export interface SaveSection {
+  chainage_m: number;
+  design?: Raw | null;
+  samples?: CrossGroundSample[];
+  frame?: { origin?: { x: number; y: number }; left_xy?: [number, number] };
+  plan_radius_m?: number | null;
+  curve_outer_side?: string | null;
+  curve_widening_m?: number | null;
+}
+
+export interface SaveCrossInput {
+  /** 종단 계획선 표본(`design_profiles[0].samples`). */
+  profile: ReadonlyArray<{ chainage_m?: unknown; elevation_m?: unknown }>;
+  sections: SaveSection[];
+  standard: CrossDesignOptions["standard"];
+  rockDefaultM: number;
+  pipes: readonly CulvertPipePoint[];
+  /** 구조물 정본 — null = 못 읽음(소단 = 저장분 그대로 · 포장 · 맹암거 구간 없음). */
+  structures: readonly FacilityStructure[] | null;
+}
+
+/** 측점마다 결과 — 설계 없는 측점 null · 넓혔으면 표본 · 넓힘 기록. */
+export interface SaveCrossRow {
+  design: Raw;
+  samples?: CrossGroundSample[];
+  extended?: ExtendInfo;
+}
+
+/** [저장] 횡단 한 바퀴 — 파이썬 `_recompute` 의 설계선 · 넓힘 · 포장 · 하강 넷(차례 그대로 · 제자리 아님). */
+export function enforceSavedCross(
+  input: SaveCrossInput,
+  grid: () => DtmGrid | null,
+): Array<SaveCrossRow | null> {
+  const ranges = facilityRanges(input.pipes, input.structures ?? []);
+  const spans = input.structures
+    ? bermSpansFromStructures(input.structures as Parameters<typeof bermSpansFromStructures>[0])
+    : null;
+  const rows = input.sections.map((section): SaveCrossRow | null =>
+    section.design && typeof section.design === "object" ? { design: section.design } : null,
+  );
+  const elevation = (section: SaveSection) => elevationAt(input.profile, section.chainage_m);
+  const compute = (samples: CrossGroundSample[] | undefined, z: number | null, raw: Raw) => {
+    try {
+      return computeCrossDesign(
+        samples ?? [],
+        z,
+        crossOptions(raw, input.standard),
+      ) as unknown as Raw;
+    } catch {
+      return null; // 파이썬 ValueError · Node { error } 자리 — 저장분 그대로
+    }
+  };
+  /** 다시 세운 설계에 사용자 값 · 상태 승계(파이썬 `apply_designs`). */
+  const keep = (next: Raw, from: Raw): Raw => {
+    for (const key of ["status", "pavement_suggested", ...USER_TOUCHED_KEYS])
+      if (from[key] !== undefined && from[key] !== null) next[key] = from[key];
+    return next;
+  };
+  const at = (section: SaveSection) => facilityAt(ranges, section.chainage_m);
+  const sectionRaw = (section: SaveSection) => section as unknown as Raw;
+
+  // ① 모든 측점 설계선(`enforce_design_lines`) — 소단 = 구조물 정본 구간 · 하강 · 기울임 = 지금 시설
+  input.sections.forEach((section, index) => {
+    const row = rows[index];
+    if (!row) return;
+    const design = spans
+      ? { ...row.design, berm: bermSpecAt(spans, section.chainage_m) }
+      : row.design;
+    const facility = at(section);
+    const next = compute(section.samples, elevation(section), {
+      ...storedOptions(design, sectionRaw(section), input.rockDefaultM),
+      surface_drop_m: facility.surfaceDropM,
+      tilted: facility.tilted,
+      tilt_pct: facility.tiltPct,
+    });
+    if (next) row.design = keep(next, design);
+  });
+  // ② 미교차 넓힘(`extend_unclosed_sections`) — 열린 쪽만 +5 m · DTM 격자 · 넓힌 표본으로 다시 셈
+  const open = rows.some((row) => row?.design.slope_unclosed);
+  const map = open ? grid() : null;
+  input.sections.forEach((section, index) => {
+    const row = rows[index];
+    const origin = section.frame?.origin;
+    const left = section.frame?.left_xy;
+    if (!map || !row?.design.slope_unclosed || !origin || !left) return;
+    const design = row.design;
+    const z = elevation(section);
+    const raw = {
+      ...storedOptions(design, sectionRaw(section), input.rockDefaultM),
+      surface_drop_m: at(section).surfaceDropM,
+      ...storedTilt(design),
+    };
+    let wide;
+    try {
+      wide = extendUnclosed(
+        (section.samples ?? []) as Array<Partial<CrossGroundPoint>>,
+        [origin.x, origin.y],
+        left,
+        (samples) => {
+          const next = compute(samples as CrossGroundSample[], z, raw);
+          if (!next) throw new Error("넓힘 셈 못 함");
+          return next as unknown as UnclosedDesign;
+        },
+        map,
+      );
+    } catch {
+      return; // 파이썬 ValueError · KeyError — 그 측점 그대로
+    }
+    if (!wide || (!wide.info.left_m && !wide.info.right_m)) return;
+    const samples = wide.samples as CrossGroundSample[];
+    const next = compute(samples, z, raw);
+    if (!next) return;
+    rows[index] = { design: keep(next, design), samples, extended: wide.info };
+  });
+  const samplesOf = (index: number) => rows[index]?.samples ?? input.sections[index].samples;
+  // ③ 포장 구간(`enforce_pavement_ranges`) — 포장 · 기울임이 저장분과 다른 측점만
+  input.sections.forEach((section, index) => {
+    const row = rows[index];
+    if (!row) return;
+    const design = row.design;
+    const facility = at(section);
+    const tilt = storedTilt(design);
+    if (
+      Boolean(design.paved) === facility.paved &&
+      tilt.tilted === facility.tilted &&
+      tilt.tilt_pct === facility.tiltPct
+    )
+      return;
+    const next = compute(samplesOf(index), elevation(section), {
+      ...storedOptions(design, sectionRaw(section), input.rockDefaultM),
+      paved: facility.paved,
+      surface_drop_m: facility.surfaceDropM,
+      tilted: facility.tilted,
+      tilt_pct: facility.tiltPct,
+    });
+    if (next) row.design = keep(next, design);
+  });
+  // ④ 세월교 노면 하강(`enforce_ford_surface_drops`) — 하강이 저장분과 다른 측점만
+  input.sections.forEach((section, index) => {
+    const row = rows[index];
+    if (!row) return;
+    const design = row.design;
+    const wanted = at(section).surfaceDropM;
+    if (Math.abs(wanted - Number(design.surface_drop_m || 0)) < 1e-6) return;
+    const next = compute(samplesOf(index), elevation(section), {
+      ...storedOptions(design, sectionRaw(section), input.rockDefaultM),
+      surface_drop_m: wanted,
+      ...storedTilt(design),
+    });
+    if (next) row.design = keep(next, design);
+  });
+  return rows;
+}
diff --git a/common_util/common_util_calc_runner.py b/common_util/common_util_calc_runner.py
index 810d1d7e6..094033949 100644
--- a/common_util/common_util_calc_runner.py
+++ b/common_util/common_util_calc_runner.py
@@ -75,8 +75,11 @@ def run_calc(ids: Sequence[str], inputs: dict[str, Any]) -> dict[str, Any] | Non
     unknown = [item for item in ids if item not in NODE_IDS]
     if unknown:
         raise ValueError(f"Node 실행기 아닌 id: {', '.join(unknown)}")
-    output = run_bundle_json(BUNDLE, NPM_SCRIPT, {"run": list(ids), "inputs": inputs})
-    return output.get("results") if isinstance(output, dict) else None
+    # 늘 떠 있는 Node(511-B B-4 · 부름당 새 프로세스 0.1~0.2 s 덞) · 못 띄우면 새 프로세스 한 번
+    answer = _SERVED.call({"run": list(ids), "inputs": inputs})
+    if answer is None:
+        answer = run_bundle_json(BUNDLE, NPM_SCRIPT, {"run": list(ids), "inputs": inputs})
+    return answer.get("results") if isinstance(answer, dict) else None
 
 
 class _Served:
diff --git a/resources/tester/helper_266_card_toggle.mjs b/resources/tester/helper_266_card_toggle.mjs
index 33f07986e..477d5aec0 100644
--- a/resources/tester/helper_266_card_toggle.mjs
+++ b/resources/tester/helper_266_card_toggle.mjs
@@ -136,7 +136,7 @@ async function toggles(projectId, shift) {
 
 const out = { same: await toggles("p266a", 0), mismatch: await toggles("p266b", 0.002) };
 
-/* 서버 폴백(선형 저장분 없음) — 카드 선택이 요청에 실림 · 열쇠 = 측점 자리 */
+/* 선형 저장분 없음 — 옛 서버 폴백 걷음(511-B B-4) · 부름 0 */
 {
   const projectId = "p266c";
   m.writeState("std-cross", job.standard, projectId);
@@ -149,7 +149,7 @@ const out = { same: await toggles("p266a", 0), mismatch: await toggles("p266b",
     ditch_choice: false,
   });
   await m.refreshSavedCross({ projectId, routeId: R, detail, edits: EDITS }, [], () => undefined);
-  out.server = { at, choices: previews.at(-1)?.design_choices ?? null };
+  out.server = { at, calls: previews.length };
 }
 
 process.stdout.write(JSON.stringify(out));
diff --git a/resources/tester/test_266_card_toggle_mismatch.py b/resources/tester/test_266_card_toggle_mismatch.py
index 30e03293d..fa3afc410 100644
--- a/resources/tester/test_266_card_toggle_mismatch.py
+++ b/resources/tester/test_266_card_toggle_mismatch.py
@@ -5,7 +5,7 @@
     복합경사 · 측구 · 지반 단추마다 그 측점 설계선 · 면적이 바뀜.
   - 묶음 측점 = 상세 측점이면 돌려줌 · 1 mm 넘게 다르면 null(묶음 엔진) — 그래도 카드 자료는 고침.
   - 사면 이동 한 걸음도 같음 · 걸음마다 받는 쪽(카드 · 종단 · 유토 다시 그림) 한 번(441 · 요구 268-2 · 4).
-  - 서버 폴백(선형 저장분 없음)에도 카드 선택이 실림(열쇠 = 측점 자리) · 서버는 저장분 위에 얹음.
+  - 선형 저장분 없음 = 서버 폴백 없음(511-B B-4 · `/cross-design/preview` 걷음).
 짝: `helper_266_card_toggle.mjs` · 진입점 `helper_266_card_toggle_entry.ts` ·
 지형 · 노선 틀 = `test_346_2_pipeline_cross_page.py`.
 """
@@ -29,7 +29,6 @@ for path in (ROOT, HERE):
 
 from test_346_2_pipeline_cross_page import _fake, _line, _sections  # noqa: E402
 
-from B06_Section.B06_Section_Router import _with_design_choices  # noqa: E402
 from common_util.common_util_surface_sampler import DtmGridSampler  # noqa: E402
 from config.config_system import STANDARD_ROCK_BOUNDARY_DEFAULT_OFFSET_M  # noqa: E402
 from config.config_system_design import STANDARD_CROSS_SECTION  # noqa: E402
@@ -121,19 +120,6 @@ def test_측점_어긋남_카드_자료는_고침_돌려줄_값만_null(r):
     _check_toggles(r["mismatch"], None)
 
 
-def test_서버_폴백에_카드_선택_실음(r):
-    key = f"{r['server']['at']:.3f}"
-    choice = (r["server"]["choices"] or {}).get(key)
-    assert choice is not None, r["server"]
-    assert choice["ground_type"] == "soil"
-    assert choice["two_stage_slope"] is True
-    assert choice["ditch_choice"] is False
-
-
-def test_서버_카드_선택이_저장분_위에_얹힘():
-    stored = [{"chainage_m": 40.0, "design": {"ground_type": "ripping_rock", "berm": {"w": 1}}}]
-    rows = _with_design_choices(stored, {"40.000": {"ground_type": "soil"}, "60.123": {"x": 1}})
-    by_key = {round(float(r["chainage_m"]), 3): r["design"] for r in rows}  # 서버 읽는 꼴
-    assert by_key[40.0] == {"ground_type": "soil", "berm": {"w": 1}}
-    assert by_key[60.123] == {"x": 1}
-    assert _with_design_choices(stored, None) == stored
+def test_선형_저장분_없음_서버_폴백_없음(r):
+    # 511-B B-4 — 옛 데이터 서버 프리뷰(`/cross-design/preview`) 걷음 · 부름 0
+    assert r["server"]["calls"] == 0, r["server"]
diff --git a/resources/tester/test_475_3_seat_carry.py b/resources/tester/test_475_3_seat_carry.py
index c23b0bf56..d5c233ec9 100644
--- a/resources/tester/test_475_3_seat_carry.py
+++ b/resources/tester/test_475_3_seat_carry.py
@@ -201,13 +201,13 @@ def test_기본_설계가_넘긴_손_단면_유형으로_셈(tmp_path, monkeypat
     import B06_Section.B06_Section_Router_Design as design_module
 
     seen: list[tuple[str, object]] = []
-    real = design_module.compute_cross_design
+    real = design_module.compute_cross_designs  # 511-B B-4 — 측점 묶음 Node 한 번
 
-    def spy(*args, **kwargs):
-        seen.append((kwargs["section_mode"], kwargs.get("ditch_side")))
-        return real(*args, **kwargs)
+    def spy(jobs, *args, **kwargs):
+        seen.extend((options["section_mode"], options.get("ditch_side")) for *_, options in jobs)
+        return real(jobs, *args, **kwargs)
 
-    monkeypatch.setattr(design_module, "compute_cross_design", spy)
+    monkeypatch.setattr(design_module, "compute_cross_designs", spy)
     route = tmp_path / "routes" / "r1"
     (route / "longitudinal").mkdir(parents=True)
     (route / "cross_sections").mkdir()
diff --git a/resources/tester/test_masshaul_single_source.py b/resources/tester/test_masshaul_single_source.py
index 4ecb605d0..93fc804a7 100644
--- a/resources/tester/test_masshaul_single_source.py
+++ b/resources/tester/test_masshaul_single_source.py
@@ -46,7 +46,7 @@ def test_b06_context_uses_workflow_route():
 def test_cross_refresh_is_single_entry():
     """횡단 재계산은 한 창구뿐 — 두 화면이 같은 인자를 실어 보낸다."""
     assert "export async function refreshCrossDesigns" in REFRESH
-    assert "readStandardCrossSession(projectId)" in REFRESH
+    assert "effectiveStandardCross(projectId)" in REFRESH  # 옛 서버 폴백 걷음(511-B B-4)
     assert "readRockBoundarySession(projectId, routeId)" in REFRESH
     # 부르는 곳 = 계산 묶음 cross 단계 하나(design_shared savedCross · 387-4) — 화면은 묶음에 부탁
     shared = _read("A00_Common/design/design_shared.ts")