diff --git a/B05_Profile/B05_Profile_UI_Corridor_Structures.ts b/B05_Profile/B05_Profile_UI_Corridor_Structures.ts
index fbdeb6050..866093597 100644
--- a/B05_Profile/B05_Profile_UI_Corridor_Structures.ts
+++ b/B05_Profile/B05_Profile_UI_Corridor_Structures.ts
@@ -22,17 +22,17 @@
 
 import { structureHashParts, wallSweepAt } from "./logic/B05_Profile_UI_Corridor_Structures_Hash";
 import type { CrossSection, CulvertSideSpec } from "../B06_Section/B06_Section_Api_Fetch";
-import { computeCulvertLayout } from "../B06_Section/B06_Section_UI_Cross_Culvert";
+import { computeCulvertLayout } from "../B06_Section/logic/B06_Section_Cross_Culvert";
 import {
   culvertOwnerFor,
   ownWallsDrawAt,
   restrictToSide,
   tierSpanOf,
-} from "../B06_Section/B06_Section_UI_Cross_Culvert_Wire";
+} from "../B06_Section/logic/B06_Section_Cross_Culvert_Wire";
 import { pipeWallThicknessM } from "../B06_Section/logic/B06_Section_UI_Cross_Culvert_Const";
-import type { CulvertLayout } from "../B06_Section/B06_Section_UI_Cross_Culvert";
-import { computeFordLayout, fordAdjustOf } from "../B06_Section/B06_Section_UI_Cross_Ford";
-import type { FordLayout } from "../B06_Section/B06_Section_UI_Cross_Ford";
+import type { CulvertLayout } from "../B06_Section/logic/B06_Section_Cross_Culvert";
+import { computeFordLayout, fordAdjustOf } from "../B06_Section/logic/B06_Section_Cross_Ford_Geom";
+import type { FordLayout } from "../B06_Section/logic/B06_Section_Cross_Ford_Geom";
 import {
   boreBandAt,
   boreRingChainages,
@@ -40,8 +40,11 @@ import {
   splitByBand,
 } from "./B05_Profile_UI_Corridor_Structures_Box";
 import type { SectionPolygon } from "./B05_Profile_UI_Corridor_Structures_Box";
-import { computeBoxLayout, DEFAULT_BOX_SIDE_ADJUST } from "../B06_Section/B06_Section_UI_Cross_Box";
-import type { BoxAdjust, BoxLayout } from "../B06_Section/B06_Section_UI_Cross_Box";
+import {
+  computeBoxLayout,
+  DEFAULT_BOX_SIDE_ADJUST,
+} from "../B06_Section/logic/B06_Section_Cross_Box_Geom";
+import type { BoxAdjust, BoxLayout } from "../B06_Section/logic/B06_Section_Cross_Box_Geom";
 import { buildWingSolids } from "./logic/B05_Profile_UI_Corridor_Structures_Wing";
 import {
   buildWallPath,
diff --git a/B05_Profile/B05_Profile_UI_Corridor_Structures_Box.ts b/B05_Profile/B05_Profile_UI_Corridor_Structures_Box.ts
index 347f64537..f52e7ddec 100644
--- a/B05_Profile/B05_Profile_UI_Corridor_Structures_Box.ts
+++ b/B05_Profile/B05_Profile_UI_Corridor_Structures_Box.ts
@@ -12,8 +12,8 @@
  * ========================================================================== */
 
 import type { CrossSection } from "../B06_Section/B06_Section_Api_Fetch";
-import { computeBoxLayout } from "../B06_Section/B06_Section_UI_Cross_Box";
-import type { BoxAdjust } from "../B06_Section/B06_Section_UI_Cross_Box";
+import { computeBoxLayout } from "../B06_Section/logic/B06_Section_Cross_Box_Geom";
+import type { BoxAdjust } from "../B06_Section/logic/B06_Section_Cross_Box_Geom";
 import type { CorridorStructure, StructureFrame } from "./B05_Profile_UI_Corridor_Structures";
 import { buildWingSolids } from "./logic/B05_Profile_UI_Corridor_Structures_Wing";
 import { chuteBands } from "./B05_Profile_UI_Corridor_Structures_Chute";
diff --git a/B05_Profile/B05_Profile_UI_Corridor_Structures_Chute.ts b/B05_Profile/B05_Profile_UI_Corridor_Structures_Chute.ts
index cedbba41f..5d52fcdfb 100644
--- a/B05_Profile/B05_Profile_UI_Corridor_Structures_Chute.ts
+++ b/B05_Profile/B05_Profile_UI_Corridor_Structures_Chute.ts
@@ -9,13 +9,13 @@
  * ========================================================================== */
 
 import type { ChuteSpec, CrossSection } from "../B06_Section/B06_Section_Api_Fetch";
-import type { OffsetPoint } from "../B06_Section/B06_Section_UI_Cross_Culvert_Types";
+import type { OffsetPoint } from "../B06_Section/logic/B06_Section_Cross_Culvert_Types";
 import {
   chuteBandOutline,
   chuteRun,
   groundLine,
 } from "../B06_Section/B06_Section_UI_Cross_Wall_Hatch";
-import { outletFillLine } from "../B06_Section/B06_Section_UI_Cross_Ford_Pavement";
+import { outletFillLine } from "../B06_Section/logic/B06_Section_Cross_Ford_Pavement";
 
 /** 성토 조각 하나 — B06 오버레이가 띠를 그리는 선(절토 조각은 뺀다). */
 interface FillSegment {
diff --git a/B05_Profile/B05_Profile_UI_Corridor_Structures_Path.ts b/B05_Profile/B05_Profile_UI_Corridor_Structures_Path.ts
index 1ae8dd7a6..7235b747c 100644
--- a/B05_Profile/B05_Profile_UI_Corridor_Structures_Path.ts
+++ b/B05_Profile/B05_Profile_UI_Corridor_Structures_Path.ts
@@ -11,16 +11,16 @@
  * ========================================================================== */
 
 import type { CrossSection } from "../B06_Section/B06_Section_Api_Fetch";
-import type { CulvertLayout } from "../B06_Section/B06_Section_UI_Cross_Culvert";
-import { computeCulvertLayout } from "../B06_Section/B06_Section_UI_Cross_Culvert";
+import type { CulvertLayout } from "../B06_Section/logic/B06_Section_Cross_Culvert";
+import { computeCulvertLayout } from "../B06_Section/logic/B06_Section_Cross_Culvert";
 import { bodyAbsolute } from "../B06_Section/B06_Section_UI_Cross_Body_Guard";
-import type { WallAdjust } from "../B06_Section/B06_Section_UI_Cross_Culvert_Types";
-import { ZERO_ADJUST } from "../B06_Section/B06_Section_UI_Cross_Culvert_Types";
+import type { WallAdjust } from "../B06_Section/logic/B06_Section_Cross_Culvert_Types";
+import { ZERO_ADJUST } from "../B06_Section/logic/B06_Section_Cross_Culvert_Types";
 import {
   culvertOwnerFor,
   culvertReach,
   restrictToSide,
-} from "../B06_Section/B06_Section_UI_Cross_Culvert_Wire";
+} from "../B06_Section/logic/B06_Section_Cross_Culvert_Wire";
 
 /** 단면 폴리곤 [offset, 표고][] — 코리도 솔리드가 쓰는 그 형식. */
 export type SectionPolygon = Array<[number, number]>;
diff --git a/B05_Profile/B05_Profile_UI_RouteEdit_Cross_Card.ts b/B05_Profile/B05_Profile_UI_RouteEdit_Cross_Card.ts
index f99e4050e..cb1ed51c5 100644
--- a/B05_Profile/B05_Profile_UI_RouteEdit_Cross_Card.ts
+++ b/B05_Profile/B05_Profile_UI_RouteEdit_Cross_Card.ts
@@ -24,10 +24,13 @@ import {
   inletStructure,
   revetOffset,
 } from "../B06_Section/B06_Section_Structure_Layouts";
-import { DEFAULT_BOX_SIDE_ADJUST } from "../B06_Section/B06_Section_UI_Cross_Box_Geom";
+import { DEFAULT_BOX_SIDE_ADJUST } from "../B06_Section/logic/B06_Section_Cross_Box_Geom";
 import type { BoxControl } from "../B06_Section/B06_Section_UI_Cross_Box_Panel";
-import { culvertLinkFor, type CulvertLink } from "../B06_Section/B06_Section_UI_Cross_Culvert_Wire";
-import { fordAdjustOf } from "../B06_Section/B06_Section_UI_Cross_Ford_Geom";
+import {
+  culvertLinkFor,
+  type CulvertLink,
+} from "../B06_Section/logic/B06_Section_Cross_Culvert_Wire";
+import { fordAdjustOf } from "../B06_Section/logic/B06_Section_Cross_Ford_Geom";
 import type { FordControl } from "../B06_Section/B06_Section_UI_Cross_Ford_Panel";
 import { createCrossSectionCard } from "../B06_Section/B06_Section_UI_Cross_View";
 import type { RockBoundaryControl } from "../B06_Section/B06_Section_UI_Cross_Design";
diff --git a/B06_Section/B06_Section_Api_Types.ts b/B06_Section/B06_Section_Api_Types.ts
index dde05d7ba..8c25ad53b 100644
--- a/B06_Section/B06_Section_Api_Types.ts
+++ b/B06_Section/B06_Section_Api_Types.ts
@@ -58,7 +58,7 @@ export type {
 } from "@util/common_util_mass_haul_types";
 
 /** 물넘이포장 제원 — 정의처는 렌더 모듈이다(사본 금지, 타입 전용 import라 순환 없음). */
-import type { FordPavementSpec } from "./B06_Section_UI_Cross_Ford_Pavement";
+import type { FordPavementSpec } from "./logic/B06_Section_Cross_Ford_Pavement";
 import type { RevetmentSpec } from "./B06_Section_UI_Cross_Revetment";
 import type { PavementEntry } from "@util/common_util_structure_pavement";
 import type { UnderdrainSpec } from "@util/common_util_structure_underdrain";
diff --git a/B06_Section/B06_Section_Route_Carry_Patch.ts b/B06_Section/B06_Section_Route_Carry_Patch.ts
index e365281ef..a527d7d3b 100644
--- a/B06_Section/B06_Section_Route_Carry_Patch.ts
+++ b/B06_Section/B06_Section_Route_Carry_Patch.ts
@@ -16,14 +16,14 @@ import type {
   CrossSectionPatch,
   SectionDetailResponse,
 } from "./B06_Section_Api_Fetch";
-import { DEFAULT_BASIN_ADJUST, ZERO_ADJUST } from "./B06_Section_UI_Cross_Culvert_Types";
-import type { WallAdjust } from "./B06_Section_UI_Cross_Culvert_Types";
-import { fordAdjustOf } from "./B06_Section_UI_Cross_Ford_Geom";
-import { DEFAULT_BOX_SIDE_ADJUST } from "./B06_Section_UI_Cross_Box_Geom";
+import { DEFAULT_BASIN_ADJUST, ZERO_ADJUST } from "./logic/B06_Section_Cross_Culvert_Types";
+import type { WallAdjust } from "./logic/B06_Section_Cross_Culvert_Types";
+import { fordAdjustOf } from "./logic/B06_Section_Cross_Ford_Geom";
+import { DEFAULT_BOX_SIDE_ADJUST } from "./logic/B06_Section_Cross_Box_Geom";
 import { PIPE_MATCH_M } from "../common_util/common_util_pipe_match";
 import { inferStationInterval } from "../common_util/common_util_svg";
 import { applySpanPatch, WALL_MIN_PURE_HEIGHT_M } from "./logic/B06_Section_UI_Cross_Culvert_Const";
-import { tierSpanOf } from "./B06_Section_UI_Cross_Culvert_Wire";
+import { tierSpanOf } from "./logic/B06_Section_Cross_Culvert_Wire";
 import { computeStoredLayouts } from "./B06_Section_Structure_Layouts";
 import { ROW_CARRY_KEYS } from "./logic/B06_Section_Station_Swap";
 import { mergeCrossPatches } from "./logic/B06_Section_UI_Page_Patches";
diff --git a/B06_Section/B06_Section_Structure_Layouts.ts b/B06_Section/B06_Section_Structure_Layouts.ts
index abe2571dc..7bb97e3c1 100644
--- a/B06_Section/B06_Section_Structure_Layouts.ts
+++ b/B06_Section/B06_Section_Structure_Layouts.ts
@@ -13,25 +13,25 @@
 import { computeStructureAreas, wallBodyInFillM2 } from "@util/common_util_cross_structure_areas";
 import type { CrossSection } from "./B06_Section_Api_Fetch";
 import { withoutGuardedFill } from "./B06_Section_UI_Cross_Body_Guard";
-import { computeBoxLayout, DEFAULT_BOX_SIDE_ADJUST } from "./B06_Section_UI_Cross_Box_Geom";
-import type { BoxLayout } from "./B06_Section_UI_Cross_Box_Geom";
+import { computeBoxLayout, DEFAULT_BOX_SIDE_ADJUST } from "./logic/B06_Section_Cross_Box_Geom";
+import type { BoxLayout } from "./logic/B06_Section_Cross_Box_Geom";
 import { REVET_EMBED_DEPTH_M } from "./logic/B06_Section_UI_Cross_Culvert_Const";
 import { groundInterpolator } from "./logic/B06_Section_UI_Cross_Culvert_Solve";
-import { DEFAULT_BASIN_ADJUST, ZERO_ADJUST } from "./B06_Section_UI_Cross_Culvert_Types";
-import type { BasinShape, WallAdjust, WallLayout } from "./B06_Section_UI_Cross_Culvert_Types";
+import { DEFAULT_BASIN_ADJUST, ZERO_ADJUST } from "./logic/B06_Section_Cross_Culvert_Types";
+import type { BasinShape, WallAdjust, WallLayout } from "./logic/B06_Section_Cross_Culvert_Types";
 import {
   computeCardCulvert,
   culvertLinkFor,
   ownWallsDrawAt,
   tierSpanOf,
-} from "./B06_Section_UI_Cross_Culvert_Wire";
+} from "./logic/B06_Section_Cross_Culvert_Wire";
 import type {
   ExtraWallControl,
   InletStructureControl,
   RevetOffsetControl,
-} from "./B06_Section_UI_Cross_Culvert_Wire";
-import { computeFordLayout, fordAdjustOf } from "./B06_Section_UI_Cross_Ford_Geom";
-import type { FordLayout } from "./B06_Section_UI_Cross_Ford_Geom";
+} from "./logic/B06_Section_Cross_Culvert_Wire";
+import { computeFordLayout, fordAdjustOf } from "./logic/B06_Section_Cross_Ford_Geom";
+import type { FordLayout } from "./logic/B06_Section_Cross_Ford_Geom";
 import { computeRevetmentLayout } from "./B06_Section_UI_Cross_Revetment";
 
 /** 같은 측점으로 볼 누가거리 오차(m) — 정본 반올림 자릿수보다 크게 잡는다. */
diff --git a/B06_Section/B06_Section_UI_Cross_Body_Guard.ts b/B06_Section/B06_Section_UI_Cross_Body_Guard.ts
index 83e6b671b..c5cbe4ceb 100644
--- a/B06_Section/B06_Section_UI_Cross_Body_Guard.ts
+++ b/B06_Section/B06_Section_UI_Cross_Body_Guard.ts
@@ -11,8 +11,8 @@
  * ========================================================================== */
 
 import type { CrossSection, SectionSample } from "./B06_Section_Api_Fetch";
-import { computeBoxLayout, DEFAULT_BOX_SIDE_ADJUST } from "./B06_Section_UI_Cross_Box_Geom";
-import type { BoxLayout } from "./B06_Section_UI_Cross_Box_Geom";
+import { computeBoxLayout, DEFAULT_BOX_SIDE_ADJUST } from "./logic/B06_Section_Cross_Box_Geom";
+import type { BoxLayout } from "./logic/B06_Section_Cross_Box_Geom";
 import { FILL_SLOPE_RATIO_MIN } from "./logic/B06_Section_UI_Cross_Culvert_Const";
 import type {
   CulvertDesignTrim,
@@ -20,9 +20,9 @@ import type {
   OffsetPoint,
   WallAdjust,
   WallLayout,
-} from "./B06_Section_UI_Cross_Culvert_Types";
-import { computeFordLayout, fordAdjustOf } from "./B06_Section_UI_Cross_Ford_Geom";
-import type { FordLayout } from "./B06_Section_UI_Cross_Ford_Geom";
+} from "./logic/B06_Section_Cross_Culvert_Types";
+import { computeFordLayout, fordAdjustOf } from "./logic/B06_Section_Cross_Ford_Geom";
+import type { FordLayout } from "./logic/B06_Section_Cross_Ford_Geom";
 import { buildRevetWallGeometry } from "./B06_Section_UI_Cross_Wall";
 
 type Role = "inlet" | "outlet";
diff --git a/B06_Section/B06_Section_UI_Cross_Box.ts b/B06_Section/B06_Section_UI_Cross_Box.ts
index 72132057b..109a85975 100644
--- a/B06_Section/B06_Section_UI_Cross_Box.ts
+++ b/B06_Section/B06_Section_UI_Cross_Box.ts
@@ -2,7 +2,7 @@
  * B06_Section_UI_Cross_Box.ts
  * BOX암거 측점 횡단 카드의 구체(에이프런·저판·상판·내공·성토선) **오버레이 그리기**.
  *
- * 기하 계산은 `B06_Section_UI_Cross_Box_Geom.ts`가 맡는다(700줄 제한 분리).
+ * 기하 계산은 `logic/B06_Section_Cross_Box_Geom.ts`가 맡는다(700줄 제한 분리).
  * 여기서는 계산 결과(`BoxLayout`)를 SVG 도형으로 옮기기만 한다 — 치수 결정 금지.
  *
  * 그리는 순서 = 시공 순서: ① 에이프런 → ② 저판 → ③ 상판 → ④ 내공 윤곽 → ⑤ 성토선.
@@ -10,22 +10,22 @@
  * ========================================================================== */
 
 import { pipeTagId, tagShape } from "../common_util/common_util_pick_tag";
-import type { BoxLayout, BoxSideRole } from "./B06_Section_UI_Cross_Box_Geom";
-import type { OffsetPoint } from "./B06_Section_UI_Cross_Culvert_Types";
+import type { BoxLayout, BoxSideRole } from "./logic/B06_Section_Cross_Box_Geom";
+import type { OffsetPoint } from "./logic/B06_Section_Cross_Culvert_Types";
 import { appendChuteBand } from "./B06_Section_UI_Cross_Wall_Hatch";
 
 export {
   computeBoxLayout,
   DEFAULT_BOX_ADJUST,
   DEFAULT_BOX_SIDE_ADJUST,
-} from "./B06_Section_UI_Cross_Box_Geom";
+} from "./logic/B06_Section_Cross_Box_Geom";
 export type {
   BoxAdjust,
   BoxLayout,
   BoxSideAdjust,
   BoxSideLayout,
   BoxSideRole,
-} from "./B06_Section_UI_Cross_Box_Geom";
+} from "./logic/B06_Section_Cross_Box_Geom";
 
 const SVG_NS = "http://www.w3.org/2000/svg";
 
diff --git a/B06_Section/B06_Section_UI_Cross_Box_Panel.ts b/B06_Section/B06_Section_UI_Cross_Box_Panel.ts
index ac1f08861..cbaf947c3 100644
--- a/B06_Section/B06_Section_UI_Cross_Box_Panel.ts
+++ b/B06_Section/B06_Section_UI_Cross_Box_Panel.ts
@@ -8,7 +8,7 @@
  * CSS 클래스와 조작 관례는 세월교·배수관 조정창과 같다.
  * ========================================================================== */
 
-import type { BoxSideAdjust, BoxSideRole } from "./B06_Section_UI_Cross_Box_Geom";
+import type { BoxSideAdjust, BoxSideRole } from "./logic/B06_Section_Cross_Box_Geom";
 import type { BoxPick } from "./B06_Section_UI_Cross_Box";
 import {
   bindArrowKeys,
diff --git a/B06_Section/B06_Section_UI_Cross_Culvert.ts b/B06_Section/B06_Section_UI_Cross_Culvert.ts
index 5a82725cb..dd6cf157c 100644
--- a/B06_Section/B06_Section_UI_Cross_Culvert.ts
+++ b/B06_Section/B06_Section_UI_Cross_Culvert.ts
@@ -2,7 +2,7 @@
  * B06_Section_UI_Cross_Culvert.ts
  * 배수관 측점 횡단 카드의 배수관 세트(배관·기슭막이·보호공) **오버레이 그리기**.
  *
- * 기하 계산은 `B06_Section_UI_Cross_Culvert_Geom.ts`가 맡는다(700줄 제한 분리).
+ * 기하 계산은 `logic/B06_Section_Cross_Culvert_Geom.ts`가 맡는다(700줄 제한 분리).
  * 여기서는 계산 결과(`CulvertLayout`)를 SVG 도형으로 옮기기만 한다 — 치수 결정 금지.
  *
  * 그리는 순서 = 시공·계산 순서(2026-08-20 사용자 확정):
@@ -15,14 +15,12 @@ import {
   REVET_EMBED_DEPTH_M,
   FILL_SLOPE_RATIO_MIN,
   pipeWallThicknessM,
-} from "./B06_Section_UI_Cross_Culvert_Geom";
-import type {
-  BasinShape,
-  CulvertLayout,
-  PipeEnd,
-  WallLayout,
-} from "./B06_Section_UI_Cross_Culvert_Geom";
-import { appendPipeInfoText, outlineBox } from "./B06_Section_UI_Cross_Culvert_Types";
+} from "./logic/B06_Section_Cross_Culvert_Geom";
+import type { BasinShape, CulvertLayout, WallLayout } from "./logic/B06_Section_Cross_Culvert_Geom";
+import { appendPipeInfoText } from "./B06_Section_UI_Cross_Culvert_Types";
+import { outlineBox } from "./logic/B06_Section_Cross_Culvert_Types";
+import { pipeShellCorners } from "./logic/B06_Section_Cross_Culvert";
+import type { RevetKey, RevetPick } from "./logic/B06_Section_Cross_Culvert";
 import { pipeLengthText } from "./logic/B06_Section_UI_Cross_Culvert_Const";
 import { appendWallTrench, foundationChoice } from "./B06_Section_UI_Cross_Excavation";
 import {
@@ -33,7 +31,7 @@ import {
 
 // 기하 계산 진입점과 공개 상수·타입은 여기서 재수출한다 — B05(최소 토피)와 횡단 뷰가
 // 이 모듈 경로로 이미 참조하고 있어 분리 후에도 import 경로를 바꾸지 않는다.
-export { MIN_PIPE_COVER_M, computeCulvertLayout } from "./B06_Section_UI_Cross_Culvert_Geom";
+export { MIN_PIPE_COVER_M, computeCulvertLayout } from "./logic/B06_Section_Cross_Culvert";
 export type {
   BasinLayout,
   BasinShape,
@@ -41,7 +39,9 @@ export type {
   CulvertLayout,
   EndFace,
   InletStructureChoice,
-} from "./B06_Section_UI_Cross_Culvert_Geom";
+  RevetKey,
+  RevetPick,
+} from "./logic/B06_Section_Cross_Culvert";
 
 const SVG_NS = "http://www.w3.org/2000/svg";
 
@@ -59,13 +59,6 @@ function polygon(
   return shape;
 }
 
-/** 기슭막이 선택 키 — 측점 안에서 어느 벽인지 가린다. 추가 벽은 `extra{n}`. */
-// "own" = 배관과 무관한 **독립 기슭막이**(구조물 정본 D군). 조정창·조작값 저장은
-// 배관 벽과 같은 체계를 그대로 쓴다(2026-08-28 사용자: 배관측점처럼 이동).
-export type RevetKey = "inlet" | "outlet" | "own" | `extra${number}` | `bextra${number}`;
-/** 고름 전용 키 — 벽 키 + 관(118-1) · 도수로 띠(152-4) — 조정창 없음 · 강조만. 조정 함수에는 `RevetKey` 만. */
-export type RevetPick = RevetKey | "pipe" | "chute";
-
 /** 벽 강조를 카드 재생성 없이 갈아 끼우는 setter. */
 export type RevetHighlightSetter = (key: RevetPick | null) => void;
 
@@ -88,7 +81,7 @@ export function appendCulvertOverlay(
   /** 옆 측점에서 연동으로 넘어온 벽 — 주 형상과 색을 갈라 그림(79-6). */
   linked?: boolean,
 ): RevetHighlightSetter {
-  const { culvert, pipe, pipeCorners } = layout;
+  const { culvert, pipe } = layout;
   // 신원표(323-5) — 관 세션 id · 부분 = 조정창 부재키
   const ownerId = culvert.chainage_m != null ? pipeTagId(culvert.chainage_m) : null;
   const diameter = culvert.diameter_m;
@@ -292,23 +285,6 @@ export function appendCulvertOverlay(
   }
 
   // ③ 관 — 축 법선 두께의 직사각형. 끝단면은 구조물 계류측 변에서 잘려 온다(Geom).
-  const { axis, normal } = layout.pipeAxis;
-  // 미세한 틈 방지: 양 끝을 축 방향으로 아주 조금만 밀어 넣는다. 벽 전면이 1:0.3으로
-  // 기울어 있어 크게 밀면 관 하단이 벽 **바깥으로 삐져나온다**(2026-08-20 사용자 ③
-  // 위치 어긋남 원인) — 렌더링 틈만 덮을 만큼(2㎝)으로 줄였다.
-  const OVERLAP_M = 0.02;
-  const pushOut = (corner: PipeEnd, dirSign: number): PipeEnd => ({
-    bottom: {
-      offset: corner.bottom.offset + dirSign * axis.offset * OVERLAP_M,
-      elevation: corner.bottom.elevation + dirSign * axis.elevation * OVERLAP_M,
-    },
-    top: {
-      offset: corner.top.offset + dirSign * axis.offset * OVERLAP_M,
-      elevation: corner.top.elevation + dirSign * axis.elevation * OVERLAP_M,
-    },
-  });
-  const inletFinal = pushOut(pipeCorners.inlet, -1);
-  const outletFinal = pushOut(pipeCorners.outlet, 1);
 
   const kindLabel = culvert.pipe_kind ? `${culvert.pipe_kind} ` : "";
   const wallThickness = pipeWallThicknessM(culvert.pipe_kind, diameter);
@@ -321,16 +297,6 @@ export function appendCulvertOverlay(
     ` · 관 두께 ${(wallThickness * 1000).toFixed(1)}㎜(외경선 기준)` +
     ` · 최소 토피 ${culvert.min_cover_m.toFixed(1)}m(별표2 복토 교차 참조)`;
   // 외경(관 두께 바깥) → 내경 순으로 2겹. 도면처럼 관벽 두께가 보이게 한다(사용자 ③).
-  const shifted = (corner: PipeEnd, delta: number): PipeEnd => ({
-    bottom: {
-      offset: corner.bottom.offset - normal.offset * delta,
-      elevation: corner.bottom.elevation - normal.elevation * delta,
-    },
-    top: {
-      offset: corner.top.offset + normal.offset * delta,
-      elevation: corner.top.elevation + normal.elevation * delta,
-    },
-  });
   const pipeShapes: SVGPolygonElement[] = []; // 관 두 겹 — 관 고름 강조(118-1)
   let pipeHitPoints: Array<[number, number]> = [];
   const pipeLayers = hidePipe
@@ -340,8 +306,7 @@ export function appendCulvertOverlay(
         [0, "b06-chart__culvert-pipe"],
       ] as const);
   for (const [delta, cls] of pipeLayers) {
-    const a = shifted(inletFinal, delta);
-    const b = shifted(outletFinal, delta);
+    const [a, b] = pipeShellCorners(layout, delta);
     const points: Array<[number, number]> = [
       [x(a.bottom.offset), toDisplayY(a.bottom.elevation)],
       [x(b.bottom.offset), toDisplayY(b.bottom.elevation)],
diff --git a/B06_Section/B06_Section_UI_Cross_Culvert_Types.ts b/B06_Section/B06_Section_UI_Cross_Culvert_Types.ts
index ac4aec3d0..c0f224860 100644
--- a/B06_Section/B06_Section_UI_Cross_Culvert_Types.ts
+++ b/B06_Section/B06_Section_UI_Cross_Culvert_Types.ts
@@ -1,55 +1,8 @@
 /* =============================================================================
  * B06_Section_UI_Cross_Culvert_Types.ts
- * 배수관 세트 기하 **자료형** — 기하 계산(`_Cross_Culvert_Geom.ts`)에서 분리했다
- * (700줄 제한). 계산·그리기 양쪽이 함께 쓴다.
+ * 배수관 · 세월교 관 정보 글 그리기 — 자료형은 `logic/B06_Section_Cross_Culvert_Types.ts`.
  * ========================================================================== */
 
-import type { CulvertSet } from "./B06_Section_Api_Fetch";
-import type { RevetMaterial } from "./logic/B06_Section_UI_Cross_Culvert_Const";
-
-/**
- * 기슭막이 1매의 사용자 조작값(2026-08-22 확정 4축):
- *   x = 좌우(m, + = 계류측 바깥) — 노견(또는 윗단 시작점 수평선)을 늘려 평행이동,
- *       성토선 물매 1:1.2 불변.
- *   d = 상하(m, 수평 성분, + = 사면 아래) — 성토선을 타고 대각 이동.
- *       **배관(유입·유출) 벽**은 0점 = 성토선 길이 0 지점(벽 상단 = 노견)인
- *       절대값(2026-08-23 사용자 확정), null = 기본 자리(성토선 0 지점 · 79-5).
- *       추가 벽은 종전대로 자동 자리 기준 상대값(null = 0).
- *   h = 높이(m). 배관 벽은 **순수 높이**(바닥~상단, 관 아래 0.5 포함 —
- *       2026-08-23), 추가 벽은 계산용(근입 0.5 위 기준선~상단). null = 기본값
- *       (배관 관경+1.0·일반 1.5, 재질 한계로 잘림).
- *   m = 재질. null = 기본값(메쌓기). 한계: 메 2.0 / 찰 3.0 / 콘크리트 5.0.
- */
-export interface WallAdjust {
-  x: number;
-  d: number | null;
-  h: number | null;
-  /** 형태(`REVET_FORMS` 문자열). 옛 저장분은 재질 코드(dry/wet/concrete) — `revetFormOf`가 옮긴다. */
-  m: string | null;
-}
-
-/** 조작값 기본(전부 자동). */
-export const ZERO_ADJUST: WallAdjust = { x: 0, d: null, h: null, m: null };
-
-export interface OffsetPoint {
-  offset: number;
-  elevation: number;
-}
-
-/** 점들을 감싸는 가상 사각형 — 고르기 판정면만(그림 아님) · 세월교 측벽 ㄴ(79-6) · 집수정(190-1). */
-export function outlineBox(points: OffsetPoint[]): OffsetPoint[] {
-  const offsets = points.map((point) => point.offset);
-  const elevations = points.map((point) => point.elevation);
-  const [left, right] = [Math.max(...offsets), Math.min(...offsets)];
-  const [top, bottom] = [Math.max(...elevations), Math.min(...elevations)];
-  return [
-    { offset: left, elevation: top },
-    { offset: right, elevation: top },
-    { offset: right, elevation: bottom },
-    { offset: left, elevation: bottom },
-  ];
-}
-
 /**
  * 관 정보 글(세월교 · 관 자리) — 노폭 · 노견 라벨(`.b06-chart__carriageway-label`) 바로 위 줄(225-1).
  * 같은 그림에 그 라벨이 없으면(B07 덧그림) `fallback` 자리 · fallback 도 없으면 안 그림.
@@ -74,198 +27,3 @@ export function appendPipeInfoText(
   label.textContent = text;
   (road?.parentNode ?? layer).appendChild(label);
 }
-
-/** 설계선(성토 경사) 트림 범위 — 이 밖은 벽·보호공이 대신하므로 그리지 않는다. */
-export interface CulvertDesignTrim {
-  minOffset: number;
-  maxOffset: number;
-  /** 트림 경계에서 성토 경사선이 **닿아야 할 표고**(= 벽 이음선 상단점). 없으면 설계선 그대로. */
-  minElevation?: number;
-  maxElevation?: number;
-  /**
-   * 노견 → (노폭 연장) → 벽 이음선 상단점 폴리라인. 물매가 1:1.2 고정이라 벽이 밖으로
-   * 나간 만큼 **노폭이 늘어난다** — 그 연장 구간이 가운데 점으로 들어온다.
-   */
-  minSlope?: { points: OffsetPoint[] };
-  maxSlope?: { points: OffsetPoint[] };
-}
-
-export interface WallLayout {
-  role: "inlet" | "outlet" | "extra";
-  /** 추가 기슭막이 번호(role === "extra"일 때만) — 조정창 키 `extra{n}`이 된다. */
-  extraIndex?: number;
-  form: string | null;
-  lengthM: number | null;
-  /** 배면(도로측) 바닥 offset. */
-  backOffset: number;
-  /** 전면(계류측) 바닥 offset. */
-  outerOffset: number;
-  base: number;
-  /** 벽 높이(m) = **계산용**(관 invert~상단, 근입 제외 — 2026-08-22 사용자 확정).
-   *  기초는 시공 시 묻히는 부분이라 높이 표기·한계 검사(찰 3.0/메 2.0) 모두 이 기준. */
-  height: number;
-  /**
-   * 바닥이 원지반에서 뜬 간격(m, 2026-08-22 사용자 확정). 손으로 안쪽에 당겨 높이
-   * 한계로도 사면선에 못 닿을 때 바닥을 띄워 최소 노견을 확보한다 — 뜬 공간은
-   * 별도 지지 구조물로 메운다(추가 예정). 0이면 지반 위(근입 0.5m).
-   */
-  floatGapM: number;
-  /** 좌우 이동의 **하한**(m, 2026-09-07). 선반 길이가 음수가 되지 않게 x 는 최소
-   *  `1.2 × 상하 내림`까지 따라 나간다. 요청이 이 값보다 작으면 눌러도 벽이 안 움직임 —
-   *  그 까닭을 툴팁으로 알린다. */
-  shiftFloorM?: number;
-  /** 재질(메/찰/콘크리트) — 높이 한계를 정한다(2026-08-22 사용자). */
-  material: RevetMaterial;
-  /** 전면 기울기 1:n 의 n — 품셈 13-4-4 [주]⑪ 표준경사(`wallLeanRatio`, B08 과 한 벌 · 2026-09-14). */
-  lean: number;
-  outward: number;
-  /** 합성 단면(하부 사다리꼴 + 상부 평행사변형) 꼭짓점 — 데이터 좌표. */
-  points: OffsetPoint[];
-  /** 상단 배면 꼭짓점 — 성토 사면선과의 접점(설계선 트림 경계). */
-  topBack: OffsetPoint;
-  /** 이음선 상단점(평행사변형↔사다리꼴 상단 교차점) — 안 무늬 이음선 자리. */
-  topJoint: OffsetPoint;
-  /** 성토 위 이음 — 윗면 사면 쪽 끝에서 0.1 m 안(371-1). 성토 사면선이 여기서 끝난다. */
-  fillTop: OffsetPoint;
-  /** 하단선 양 끝 — **수평 기초**(2026-08-22 사용자 확정): 발자국 최저 지반(또는 관
-   *  invert) − 0.5m 표고의 수평선. 전면 발끝은 1:0.3 경사선을 하단까지 연장한 자리다. */
-  bottomBack: OffsetPoint;
-  bottomFront: OffsetPoint;
-  /** 옹벽(구조물 `retaining_wall`) — 안 무늬에 물빼기 파이프 단면을 더함(73-2). */
-  retaining?: boolean;
-}
-
-/**
- * 유입 집수정 단면 — 실무 도면(2026-08-20 사용자 제공 L형 확대본) 기준.
- *   · **I형** = 기슭막이와 같은 **평행사변형 벽 1매**만.
- *   · **ㄴ(L)형** = I형 + **바닥판**.
- *   · **ㄷ형** = ㄴ형 + I형 **반대측 막음벽**.
- * 돌 표현은 재질 확정 시 반영 예정(성토부 기슭막이와 동일 규칙) — 지금은 윤곽만.
- */
-export type BasinShape = "I" | "L" | "U";
-
-export interface BasinLayout {
-  shape: BasinShape;
-  /** 부재별 폴리곤(벽·바닥·막음벽). 각각 분리 도형으로 그린다. */
-  parts: Array<{ kind: "wall" | "floor"; points: OffsetPoint[] }>;
-  label: OffsetPoint;
-  /** 자동 전환 사유 — 툴팁·라벨에 쓴다(2026-08-22 재정의: 성토사면 ≤3m 기준).
-   *  "cut" = 절토측 유입(성토사면 없음), "short" = 성토사면 3m 이하,
-   *  "manual" = 규칙상 기슭막이 자리지만 사용자가 집수정을 선택. */
-  reason: "cut" | "short" | "manual";
-  /** 집수정이 원지반 안으로 들어갈 때의 절토선 점열(구조물 바깥 끝 → 복합경사 → 지반 교차점 · 91-4). */
-  cutLine: OffsetPoint[] | null;
-  /** 구조물이 원지반 밖으로 나올 때의 성토(되메움)선 — 경사 5도(임시), 지반 교차점까지. */
-  fillLine: { from: OffsetPoint; to: OffsetPoint } | null;
-}
-
-/** 측점별 집수정 조정값. 위치값은 기본 배치 기준이며 +는 계류측/사면 아래 방향이다. */
-export interface BasinAdjust {
-  innerWidthM: number;
-  innerHeightM: number;
-  lateralM: number;
-  slopeM: number;
-}
-
-export const DEFAULT_BASIN_ADJUST: BasinAdjust = {
-  innerWidthM: 1.0,
-  innerHeightM: 1.2,
-  lateralM: 0,
-  slopeM: 0,
-};
-
-/** 관 끝단을 자를 마감면 — 구조물(기슭막이·집수정)의 계류측 변을 **그대로 복사**한다. */
-export interface EndFace {
-  base: OffsetPoint;
-  direction: { offset: number; elevation: number };
-}
-
-/** 관 한쪽 끝단의 두 꼭짓점(마감면에서 자른 결과). */
-export interface PipeEnd {
-  bottom: OffsetPoint;
-  top: OffsetPoint;
-}
-
-/**
- * 유출측 **성토부선** 한 구간(2026-08-22 사용자 — 보호공 삭제, 윗면 선만 성토부선으로).
- * 관 하단 꼭짓점(또는 앞 추가 벽 전면 상단)에서 1:1.2로 원지반(또는 다음 벽)까지.
- */
-export interface OutletFillSegment {
-  points: OffsetPoint[];
-  lengthM: number;
-  /** 구간 물매(1:n) — 벽 사이 구간은 높이 역산으로 정확히 1.2다. */
-  ratio?: number;
-  /** 선 성격(2026-08-22 사용자 ②③): fill = 성토선(기본), cut = 0도/접속 절토선. */
-  kind?: "fill" | "cut";
-  /** 사면길이 5m 이상 — 기슭막이 의무 구간(별표2·성토_비탈면 §2). */
-  overLimit: boolean;
-}
-
-export interface CulvertLayout {
-  culvert: CulvertSet;
-  /** 원지반 — 도수로 · 돌붙임 길이가 사면보다 길면 이어 그림(294-4). */
-  ground?: OffsetPoint[];
-  pipe: { inlet: OffsetPoint; outlet: OffsetPoint; lengthM: number; slopePct: number };
-  /** 관 축·법선 단위벡터(그리기가 두께 방향으로 밀 때 쓴다). */
-  pipeAxis: { axis: OffsetPoint; normal: OffsetPoint };
-  /** 관 양 끝단 꼭짓점 — 보호공 시작점이 유출 하단 꼭짓점을 그대로 쓴다. */
-  pipeCorners: { inlet: PipeEnd; outlet: PipeEnd };
-  walls: WallLayout[];
-  /** 유출측 성토사면 — 경사길이(m)·법정 5m 충족 여부(별표2)·풀어낸 물매(1:n). */
-  fillSlope: {
-    lengthM: number;
-    withinLimit: boolean;
-    /** 사면선이 벽 이음선 상단점을 지나도록 역산한 물매. 범위 밖이면 끝값으로 고정. */
-    ratio: number;
-    /** 물매가 1.2~2.0 범위를 벗어났는지 — 도면 경고용. */
-    ratioClamped: boolean;
-    /** 물매 1:1.2를 지키려고 늘린 **노폭 연장량**(m, 편측). 0이면 연장 없음. */
-    roadWideningM: number;
-    /**
-     * 기슭막이만으로는 성토를 받을 수 없는 자리(성토고 3m↑인데 사면 5m·물매 1:1.2를
-     * 동시에 만족하는 벽 자리가 없다) — **옹벽·석축 등 구조물 검토 대상**
-     * (`성토_비탈면.md` §2 "5m 초과 시 구조물 설치 의무").
-     */
-    structureRequired: boolean;
-  };
-  /** 유출측 성토부선(보호공 대체 — 2026-08-22). 끝 구간이 5m 이상이면 추가 가능. */
-  outletFill: { segments: OutletFillSegment[]; addable: boolean };
-  /** 유입 집수정(ㄴ·ㄷ형) 계류측 성토부선 — 유출측과 같은 체계(2026-08-22 사용자). */
-  basinFill: { segments: OutletFillSegment[]; addable: boolean };
-  /** 집수정 계류측 다단 기슭막이 — 조정창 키 `bextra{n}`. */
-  basinExtras: WallLayout[];
-  /** 한계에 잘린 뒤의 **실제 적용된** 집수정 조작값 — 조정창이 되받는다. */
-  basinAdjust: BasinAdjust;
-  /** 유입 기슭막이의 관 시작 접속선(2026-08-22 ②) — 위면 0도 성토선(지반 정지),
-   *  아래면 0도 1m 후 표준 절토 경사선. 집수정·접속 불필요면 null. */
-  inletFill: OutletFillSegment | null;
-  /** 추가 기슭막이(배관 없는 벽 — 계단식). 조정창 키 = `extra{n}`. */
-  extraWalls: WallLayout[];
-  /** 유입 집수정 단면(있을 때만). */
-  basin: BasinLayout | null;
-  designTrim: CulvertDesignTrim | null;
-  /**
-   * **실제 적용된** 기슭막이 이동량(m, + = 계류측 바깥). 요청값이 노견·사면 역전·사면 끝
-   * 한계에 걸리면 잘려 들어온다 — 조정창은 이 값을 보여 주고 저장한다. 그러지 않으면
-   * 눌러도 안 움직이는데 숫자만 계속 커진다(2026-08-21 사용자 지적).
-   */
-  revetShift: {
-    inlet: WallAdjust;
-    outlet: WallAdjust;
-    extras: WallAdjust[];
-    /** 집수정 계류측 다단의 적용 조작값. */
-    basinExtras: WallAdjust[];
-  };
-  /**
-   * 조정창 드롭다운 선택지 가용성(2026-08-22 사용자 — 상황에 안 맞는 선택지 숨김):
-   * revetAllowed = 기슭막이+배관(배관이 원지반에 안 묻힐 때만),
-   * basinLUAllowed = 집수정 ㄴ·ㄷ형(구조물이 원지반으로 밀고 들어갈 때만).
-   */
-  inletOptions: { revetAllowed: boolean; basinLUAllowed: boolean };
-  /** 세월교 · 박스 흙막이(73-4) — 본체 끝 자리의 배관 4축 x(적용 x 의 0점). 본체 없으면 없음. */
-  bodyX?: { inlet: number; outlet: number } | null;
-  /** 유입 · 유출 벽의 순수 높이(m) — 높이 빈 칸인 연동 옆 카드가 물려받음(152-2). */
-  pureHeights?: { inlet: number; outlet: number };
-}
-/** 유입측 구조물 사용자 선택 — auto = 규칙 기반 자동 선택. */
-export type InletStructureChoice = "auto" | "revet" | "I" | "L" | "U";
diff --git a/B06_Section/B06_Section_UI_Cross_Excavation.ts b/B06_Section/B06_Section_UI_Cross_Excavation.ts
index a432f412d..ba0a8dff5 100644
--- a/B06_Section/B06_Section_UI_Cross_Excavation.ts
+++ b/B06_Section/B06_Section_UI_Cross_Excavation.ts
@@ -20,7 +20,7 @@ import {
   WALL_FOUNDATION_WIDTH_M,
   WALL_TRENCH_CLEARANCE_M,
 } from "@util/common_util_excavation";
-import type { WallLayout } from "./B06_Section_UI_Cross_Culvert_Types";
+import type { WallLayout } from "./logic/B06_Section_Cross_Culvert_Types";
 
 const SVG_NS = "http://www.w3.org/2000/svg";
 
diff --git a/B06_Section/B06_Section_UI_Cross_Ford.ts b/B06_Section/B06_Section_UI_Cross_Ford.ts
index dda7e6a5f..d21005bc7 100644
--- a/B06_Section/B06_Section_UI_Cross_Ford.ts
+++ b/B06_Section/B06_Section_UI_Cross_Ford.ts
@@ -2,7 +2,7 @@
  * B06_Section_UI_Cross_Ford.ts
  * 세월교 측점 횡단 카드의 구체(측벽·바닥판·관·성토 채움) **오버레이 그리기**.
  *
- * 기하 계산은 `B06_Section_UI_Cross_Ford_Geom.ts`가 맡는다(700줄 제한 분리).
+ * 기하 계산은 `logic/B06_Section_Cross_Ford_Geom.ts`가 맡는다(700줄 제한 분리).
  * 여기서는 계산 결과(`FordLayout`)를 SVG 도형으로 옮기기만 한다 — 치수 결정 금지.
  *
  * 그리는 순서 = 시공 순서: ① 바닥판 → ② 측벽(ㄴ형 집수정 재사용) → ③ 관 →
@@ -10,12 +10,9 @@
  * ========================================================================== */
 
 import { pipeTagId, tagShape } from "../common_util/common_util_pick_tag";
-import type { FordLayout, FordWallRole } from "./B06_Section_UI_Cross_Ford_Geom";
-import {
-  appendPipeInfoText,
-  outlineBox,
-  type OffsetPoint,
-} from "./B06_Section_UI_Cross_Culvert_Types";
+import type { FordLayout, FordWallRole } from "./logic/B06_Section_Cross_Ford_Geom";
+import { appendPipeInfoText } from "./B06_Section_UI_Cross_Culvert_Types";
+import { outlineBox, type OffsetPoint } from "./logic/B06_Section_Cross_Culvert_Types";
 import { appendChuteBand } from "./B06_Section_UI_Cross_Wall_Hatch";
 
 export {
@@ -24,14 +21,14 @@ export {
   DEFAULT_FORD_WALL_ADJUST,
   fordAdjustOf,
   fordDropOf,
-} from "./B06_Section_UI_Cross_Ford_Geom";
+} from "./logic/B06_Section_Cross_Ford_Geom";
 export type {
   FordAdjust,
   FordLayout,
   FordSideLayout,
   FordWallAdjust,
   FordWallRole,
-} from "./B06_Section_UI_Cross_Ford_Geom";
+} from "./logic/B06_Section_Cross_Ford_Geom";
 
 const SVG_NS = "http://www.w3.org/2000/svg";
 
diff --git a/B06_Section/B06_Section_UI_Cross_Ford_Panel.ts b/B06_Section/B06_Section_UI_Cross_Ford_Panel.ts
index 9a869638b..4a70e7d7a 100644
--- a/B06_Section/B06_Section_UI_Cross_Ford_Panel.ts
+++ b/B06_Section/B06_Section_UI_Cross_Ford_Panel.ts
@@ -12,7 +12,7 @@
  * 바닥판 연장은 날개벽 길이×cos(각도)가 정하므로 읽기 전용으로 보여 준다.
  * ========================================================================== */
 
-import type { FordAdjust, FordWallAdjust, FordWallRole } from "./B06_Section_UI_Cross_Ford_Geom";
+import type { FordAdjust, FordWallAdjust, FordWallRole } from "./logic/B06_Section_Cross_Ford_Geom";
 import type { FordPick } from "./B06_Section_UI_Cross_Ford";
 import {
   bindArrowKeys,
diff --git a/B06_Section/B06_Section_UI_Cross_Ford_Pavement.ts b/B06_Section/B06_Section_UI_Cross_Ford_Pavement.ts
index bd9d00b8d..11060739e 100644
--- a/B06_Section/B06_Section_UI_Cross_Ford_Pavement.ts
+++ b/B06_Section/B06_Section_UI_Cross_Ford_Pavement.ts
@@ -12,37 +12,13 @@
  * ========================================================================== */
 
 import type { CrossDesign } from "./B06_Section_Api_Fetch";
-import type { OffsetPoint } from "./B06_Section_UI_Cross_Culvert_Types";
+import type { OffsetPoint } from "./logic/B06_Section_Cross_Culvert_Types";
+import { fordEdges, outletFillLine, overflowLine } from "./logic/B06_Section_Cross_Ford_Pavement";
+import type { FordPavementSpec } from "./logic/B06_Section_Cross_Ford_Pavement";
 import { appendPavementOverlay } from "./B06_Section_UI_Cross_Design_Surface";
 import { pipeTagId, tagShape } from "../common_util/common_util_pick_tag";
 import { appendChuteBand, chuteRun } from "./B06_Section_UI_Cross_Wall_Hatch";
 
-/** 백엔드 `section.ford_pavement` 제원(치수 결정은 서버 몫 — 여기서는 좌표만 만든다). */
-export interface FordPavementSpec {
-  /** 관 지점 누가거리 — 폭 절반 걸친 옆 카드도 같은 값. */
-  chainage_m?: number;
-  span_m: number;
-  /** 월류 높이(m) — 노면 위 점선. 없으면 점선을 안 그림(수치를 지어내지 않는다). */
-  depth_m: number | null;
-  /** 노면 경사(%) — 경사각도 환산 · 서버 설계 노면이 이 값으로 기욺. */
-  slope_pct: number | null;
-  /** 정본에 안 적혀 기본값으로 그린 칸 「이름 값」 — 카드 머리에 「기본값(미확정)」. */
-  defaulted?: string[];
-  /** 도수로 · 돌붙임(`ford_chute_{n}_*` · 136-2) — 유출측 성토사면 띠 · 길이 = 사면 따라(286-3 · 비면 원지반까지). */
-  chute?: { structure: string; thickness_m: number; length_m?: number };
-}
-
-/** 유입(상류)이 좌측(+offset)인가 — 기울인 노면이면 높은 노면 끝 · 아니면 설계선 양 끝 표고가 높은
- *  쪽(286-2) · 같으면 단면유형. */
-export function inflowLeft(design: CrossDesign): boolean {
-  const edges = design.road_edges;
-  if (design.tilted && edges && Math.abs(edges.left.elevation_m - edges.right.elevation_m) > 1e-6)
-    return edges.left.elevation_m > edges.right.elevation_m;
-  const line = [...(design.design_line ?? [])].sort((a, b) => a.offset_m - b.offset_m);
-  const gap = line.length >= 2 ? line[line.length - 1].elevation_m - line[0].elevation_m : 0;
-  return Math.abs(gap) > 1e-3 ? gap > 0 : design.section_mode !== "right_cut";
-}
-
 function line(points: string[], className: string): SVGPolylineElement {
   const polyline = document.createElementNS("http://www.w3.org/2000/svg", "polyline");
   polyline.setAttribute("points", points.join(" "));
@@ -134,90 +110,6 @@ export function appendFordPavementOverlay(
   return true;
 }
 
-/** 콘크리트 · 노면 양 끝 — 낮은 쪽을 늘였으면(294-3 `tilt_reach`) 그 쪽은 원지반과 만난 자리까지. */
-export function fordEdges(design: CrossDesign): CrossDesign["road_edges"] | undefined {
-  const edges = design.road_edges;
-  const reach = design.tilt_reach;
-  if (!edges || !reach) return edges;
-  const end = { offset_m: reach.offset_m, elevation_m: reach.elevation_m };
-  return reach.side === "left" ? { ...edges, left: end } : { ...edges, right: end };
-}
-
-/**
- * 월류 높이선(315-2) — 노면 양 끝 위 월류 높이 · 노면과 같은 각도. 성토 쪽(노면 끝 밖 설계선이 내려감)은
- * 성토 사면선을 노면 끝 너머 위 · 안쪽으로 늘여 월류 높이선과 만나는 자리에서 끝 → 노면 끝까지 그 연장선.
- * 절토 쪽 · 늘인 노면 끝(294-3)은 노면 끝 위 그대로. 좌(+offset) → 우 차례.
- */
-export function overflowLine(design: CrossDesign, depth: number): OffsetPoint[] {
-  const edges = fordEdges(design);
-  if (!edges) return [];
-  const { left, right } = edges;
-  const span = Math.abs(left.offset_m - right.offset_m);
-  const side = (edge: typeof left, other: typeof left): OffsetPoint[] => {
-    const top = { offset: edge.offset_m, elevation: edge.elevation_m + depth };
-    const outward = Math.sign(edge.offset_m - other.offset_m) || 1;
-    const next = (design.design_line ?? [])
-      .filter((p) => (p.offset_m - edge.offset_m) * outward > 1e-6)
-      .sort((a, b) => (a.offset_m - b.offset_m) * outward)[0];
-    const cut = edge.offset_m === design.tilt_reach?.offset_m; // 늘인 끝 = 원지반(294-3 · 절토)
-    if (cut || !next || next.elevation_m >= edge.elevation_m - 1e-6 || span < 1e-9) return [top];
-    // 안쪽 d m 에서 성토선 = edge + fill·d · 월류선 = edge + depth + road·d → d = depth / (fill − road)
-    const fill = (edge.elevation_m - next.elevation_m) / Math.abs(next.offset_m - edge.offset_m);
-    const road = (other.elevation_m - edge.elevation_m) / span;
-    if (fill <= road + 1e-9) return [top];
-    const d = Math.min(depth / (fill - road), span);
-    const meet = { offset: edge.offset_m - outward * d, elevation: edge.elevation_m + fill * d };
-    return [{ offset: edge.offset_m, elevation: edge.elevation_m }, meet];
-  };
-  return [...side(left, right), ...side(right, left).reverse()];
-}
-
-/** 원지반 꺾은선의 그 오프셋 표고(밖은 끝값). */
-function groundZ(ground: readonly OffsetPoint[], offset: number): number | null {
-  if (!ground.length) return null;
-  if (offset <= ground[0].offset) return ground[0].elevation;
-  for (let i = 1; i < ground.length; i += 1) {
-    const [a, b] = [ground[i - 1], ground[i]];
-    if (offset > b.offset) continue;
-    const span = b.offset - a.offset;
-    return span > 1e-9
-      ? a.elevation + ((b.elevation - a.elevation) * (offset - a.offset)) / span
-      : b.elevation;
-  }
-  return ground[ground.length - 1].elevation;
-}
-
-/**
- * 유출측(낮은 쪽) 성토사면 선(136-2 · 294-4) — 낮은 쪽 끝단(늘인 노면 끝 · 아니면 유출 쪽 노견 끝)에서
- * 설계선을 바깥으로 따라 내려가는 동안만(오르면 절토라 멈춤) · 원지반(`ground`)에 닿으면 끝.
- * 성토가 없으면(끝단이 이미 원지반 · 양측 절토 물넘이) 점 하나 = 띠 없음.
- */
-export function outletFillLine(
-  design: CrossDesign,
-  ground?: readonly OffsetPoint[],
-): OffsetPoint[] {
-  const edges = fordEdges(design);
-  if (!edges || !design.design_line?.length) return [];
-  const reach = design.tilt_reach;
-  const outLeft = reach ? reach.side === "left" : !inflowLeft(design); // +offset = 좌측
-  const outward = outLeft ? 1 : -1;
-  const edge = outLeft
-    ? Math.max(edges.left.offset_m, edges.right.offset_m)
-    : Math.min(edges.left.offset_m, edges.right.offset_m);
-  const points = design.design_line
-    .filter((p) => (p.offset_m - edge) * outward >= -1e-6)
-    .sort((a, b) => (a.offset_m - b.offset_m) * outward);
-  const line: OffsetPoint[] = [];
-  for (const p of points) {
-    const last = line[line.length - 1];
-    if (last && p.elevation_m > last.elevation + 1e-6) break;
-    line.push({ offset: p.offset_m, elevation: p.elevation_m });
-    const z = ground ? groundZ(ground, p.offset_m) : null;
-    if (z !== null && Math.abs(z - p.elevation_m) < 1e-3) break; // 원지반에 닿음 = 끝
-  }
-  return line;
-}
-
 /**
  * 물넘이 도수로 · 돌붙임 선(286-3 · 294-4) — 낮은 쪽 끝단에서 성토사면 따라 · 길이 비움 = 원지반 닿으면 끝 ·
  * 길이 넣음 = 그 길이(사면보다 길면 원지반 따라 이어 · 315-1 이은 조각까지 한 선) · 양측 절토(늘인 노면 끝이
diff --git a/B06_Section/B06_Section_UI_Cross_Revetment.ts b/B06_Section/B06_Section_UI_Cross_Revetment.ts
index 8ac2c4316..0a4223eb4 100644
--- a/B06_Section/B06_Section_UI_Cross_Revetment.ts
+++ b/B06_Section/B06_Section_UI_Cross_Revetment.ts
@@ -29,14 +29,14 @@ import { outlineLeanOf } from "./logic/B06_Section_UI_Cross_Lean";
 import { catalogRow } from "../common_util/common_util_structure_catalog";
 import type { RevetMaterial } from "./logic/B06_Section_UI_Cross_Culvert_Const";
 import { fillWallBaseWidth, groundInterpolator } from "./logic/B06_Section_UI_Cross_Culvert_Solve";
-import { buildExtrasAt } from "./B06_Section_UI_Cross_Culvert_Extra";
+import { buildExtrasAt } from "./logic/B06_Section_Cross_Culvert_Extra";
 import {
   ZERO_ADJUST,
   type CulvertDesignTrim,
   type OutletFillSegment,
   type WallAdjust,
   type WallLayout,
-} from "./B06_Section_UI_Cross_Culvert_Types";
+} from "./logic/B06_Section_Cross_Culvert_Types";
 import { appendWallTrench, foundationChoice } from "./B06_Section_UI_Cross_Excavation";
 import { appendPlanLine, buildRevetWallGeometry, drawRevetWall } from "./B06_Section_UI_Cross_Wall";
 
diff --git a/B06_Section/B06_Section_UI_Cross_Structure_Panel.ts b/B06_Section/B06_Section_UI_Cross_Structure_Panel.ts
index 439d042e5..ab5f585dd 100644
--- a/B06_Section/B06_Section_UI_Cross_Structure_Panel.ts
+++ b/B06_Section/B06_Section_UI_Cross_Structure_Panel.ts
@@ -16,8 +16,8 @@
 
 import type { InletStructureChoice, RevetKey, RevetPick } from "./B06_Section_UI_Cross_Culvert";
 import { REVET_FORMS } from "./logic/B06_Section_UI_Cross_Culvert_Const";
-import type { BasinAdjust, WallAdjust } from "./B06_Section_UI_Cross_Culvert_Types";
-import type { SpanValues } from "./B06_Section_UI_Cross_Culvert_Wire";
+import type { BasinAdjust, WallAdjust } from "./logic/B06_Section_Cross_Culvert_Types";
+import type { SpanValues } from "./logic/B06_Section_Cross_Culvert_Wire";
 import { L } from "./B06_Section_UI_Section_Common";
 import {
   arrowsBelongToProfile,
diff --git a/B06_Section/B06_Section_UI_Cross_Underdrain.ts b/B06_Section/B06_Section_UI_Cross_Underdrain.ts
index 4b43d4798..111df2f66 100644
--- a/B06_Section/B06_Section_UI_Cross_Underdrain.ts
+++ b/B06_Section/B06_Section_UI_Cross_Underdrain.ts
@@ -13,7 +13,7 @@
  * ========================================================================== */
 
 import type { CrossDesign } from "./B06_Section_Api_Fetch";
-import type { OffsetPoint } from "./B06_Section_UI_Cross_Culvert_Types";
+import type { OffsetPoint } from "./logic/B06_Section_Cross_Culvert_Types";
 import { cell, courses, type BandFrame } from "./B06_Section_UI_Cross_Wall_Hatch";
 import type { UnderdrainSpec } from "@util/common_util_structure_underdrain";
 
diff --git a/B06_Section/B06_Section_UI_Cross_View.ts b/B06_Section/B06_Section_UI_Cross_View.ts
index 3f1ad8390..07a63a6f6 100644
--- a/B06_Section/B06_Section_UI_Cross_View.ts
+++ b/B06_Section/B06_Section_UI_Cross_View.ts
@@ -19,7 +19,7 @@ import {
   appendFordPavementOverlay,
   appendFordSurfaceDropPlan,
 } from "./B06_Section_UI_Cross_Ford_Pavement";
-import { ownWallsDrawAt } from "./B06_Section_UI_Cross_Culvert_Wire";
+import { ownWallsDrawAt } from "./logic/B06_Section_Cross_Culvert_Wire";
 import { attachShapePick, shapePickRoute, splitPipePick } from "./B06_Section_UI_Cross_Shape_Pick";
 import { stackPickTargets } from "./B06_Section_UI_Cross_Pick_Order";
 import { appendUnderdrainOverlay } from "./B06_Section_UI_Cross_Underdrain";
@@ -46,16 +46,16 @@ import {
 } from "./B06_Section_UI_Cross_View_Frame";
 import { appendFordOverlay, computeFordLayout } from "./B06_Section_UI_Cross_Ford";
 import type { FordControl } from "./B06_Section_UI_Cross_Ford_Panel";
-import { computeCardCulvert, setCulvertNotice } from "./B06_Section_UI_Cross_Culvert_Wire";
+import { computeCardCulvert, setCulvertNotice } from "./logic/B06_Section_Cross_Culvert_Wire";
 import { showToast } from "@ui/ui_template_elements";
-import type { CulvertLink } from "./B06_Section_UI_Cross_Culvert_Wire";
+import type { CulvertLink } from "./logic/B06_Section_Cross_Culvert_Wire";
 import type {
   ExtraWallControl,
   InletStructureControl,
   RevetLinkControl,
   RevetOffsetControl,
   StructureSpanControl,
-} from "./B06_Section_UI_Cross_Culvert_Wire";
+} from "./logic/B06_Section_Cross_Culvert_Wire";
 import { culvertCardState } from "./B06_Section_UI_Cross_View_Structure";
 import { buildCardPanels, emptyCardCulvertState } from "./B06_Section_UI_Cross_View_Panels";
 import {
@@ -134,7 +134,7 @@ export type {
   SpanRole,
   SpanValues,
   StructureSpanControl,
-} from "./B06_Section_UI_Cross_Culvert_Wire";
+} from "./logic/B06_Section_Cross_Culvert_Wire";
 
 export function createCrossSectionCard(
   section: CrossSection,
diff --git a/B06_Section/B06_Section_UI_Cross_View_Panels.ts b/B06_Section/B06_Section_UI_Cross_View_Panels.ts
index 7f53c1105..bf7c4d0ea 100644
--- a/B06_Section/B06_Section_UI_Cross_View_Panels.ts
+++ b/B06_Section/B06_Section_UI_Cross_View_Panels.ts
@@ -7,7 +7,7 @@
 import type { CrossSection } from "./B06_Section_Api_Fetch";
 import type { RevetKey, RevetPick } from "./B06_Section_UI_Cross_Culvert";
 import { REVET_FORM_DEFAULT } from "./logic/B06_Section_UI_Cross_Culvert_Const";
-import type { WallAdjust } from "./B06_Section_UI_Cross_Culvert_Types";
+import type { WallAdjust } from "./logic/B06_Section_Cross_Culvert_Types";
 import type {
   CulvertLink,
   ExtraWallControl,
@@ -15,7 +15,7 @@ import type {
   RevetLinkControl,
   RevetOffsetControl,
   StructureSpanControl,
-} from "./B06_Section_UI_Cross_Culvert_Wire";
+} from "./logic/B06_Section_Cross_Culvert_Wire";
 import { buildStructurePanel } from "./B06_Section_UI_Cross_Structure_Panel";
 import { adoptAdjustPanel, releaseAdjustPanel } from "./B06_Section_UI_Adjust_Dock";
 import { structurePanelDeps } from "./B06_Section_UI_Cross_View_Structure";
diff --git a/B06_Section/B06_Section_UI_Cross_View_Structure.ts b/B06_Section/B06_Section_UI_Cross_View_Structure.ts
index 7eab881c9..a14973fcc 100644
--- a/B06_Section/B06_Section_UI_Cross_View_Structure.ts
+++ b/B06_Section/B06_Section_UI_Cross_View_Structure.ts
@@ -15,8 +15,8 @@ import {
   WALL_MIN_PURE_HEIGHT_M,
 } from "./logic/B06_Section_UI_Cross_Culvert_Const";
 import { clampAxis, type AxisDragSpec } from "./B06_Section_UI_Cross_Panel_Base";
-import type { CulvertLayout } from "./B06_Section_UI_Cross_Culvert_Types";
-import type { WallAdjust } from "./B06_Section_UI_Cross_Culvert_Types";
+import type { CulvertLayout } from "./logic/B06_Section_Cross_Culvert_Types";
+import type { WallAdjust } from "./logic/B06_Section_Cross_Culvert_Types";
 import type { StructurePanelDeps } from "./B06_Section_UI_Cross_Structure_Panel";
 import { showToast } from "@ui/ui_template_elements";
 import { L } from "./B06_Section_UI_Section_Common";
@@ -27,7 +27,7 @@ import type {
   RevetOffsetControl,
   SpanRole,
   StructureSpanControl,
-} from "./B06_Section_UI_Cross_Culvert_Wire";
+} from "./logic/B06_Section_Cross_Culvert_Wire";
 
 /** 다단(추가) 벽 키인가 — 유출측 `extra0…`·유입측 `bextra0…`. */
 export const isTierKey = (key: RevetKey): boolean =>
diff --git a/B06_Section/B06_Section_UI_Cross_Wall.ts b/B06_Section/B06_Section_UI_Cross_Wall.ts
index ae56ba825..82fc28a05 100644
--- a/B06_Section/B06_Section_UI_Cross_Wall.ts
+++ b/B06_Section/B06_Section_UI_Cross_Wall.ts
@@ -18,7 +18,7 @@ import {
   WALL_MIN_PURE_HEIGHT_M,
 } from "./logic/B06_Section_UI_Cross_Culvert_Const";
 import type { RevetMaterial } from "./logic/B06_Section_UI_Cross_Culvert_Const";
-import type { OffsetPoint, WallLayout } from "./B06_Section_UI_Cross_Culvert_Types";
+import type { OffsetPoint, WallLayout } from "./logic/B06_Section_Cross_Culvert_Types";
 import { appendWallHatch } from "./B06_Section_UI_Cross_Wall_Hatch";
 
 const SVG_NS = "http://www.w3.org/2000/svg";
diff --git a/B06_Section/B06_Section_UI_Cross_Wall_Hatch.ts b/B06_Section/B06_Section_UI_Cross_Wall_Hatch.ts
index 38ac262c8..f6836625b 100644
--- a/B06_Section/B06_Section_UI_Cross_Wall_Hatch.ts
+++ b/B06_Section/B06_Section_UI_Cross_Wall_Hatch.ts
@@ -17,7 +17,7 @@
  * ========================================================================== */
 
 import { REVET_THICKNESS_M } from "./logic/B06_Section_UI_Cross_Culvert_Const";
-import type { OffsetPoint, WallLayout } from "./B06_Section_UI_Cross_Culvert_Types";
+import type { OffsetPoint, WallLayout } from "./logic/B06_Section_Cross_Culvert_Types";
 
 const SVG_NS = "http://www.w3.org/2000/svg";
 const HATCH_CLASS = "b06-chart__culvert-stone";
diff --git a/B06_Section/B06_Section_UI_Page_Link_Session.ts b/B06_Section/B06_Section_UI_Page_Link_Session.ts
index 9825a3885..4b2333af9 100644
--- a/B06_Section/B06_Section_UI_Page_Link_Session.ts
+++ b/B06_Section/B06_Section_UI_Page_Link_Session.ts
@@ -7,7 +7,7 @@
 
 import type { CrossSection, StoredWallSpan } from "./B06_Section_Api_Fetch";
 import type { RevetKey } from "./B06_Section_UI_Cross_Culvert";
-import type { WallAdjust } from "./B06_Section_UI_Cross_Culvert_Types";
+import type { WallAdjust } from "./logic/B06_Section_Cross_Culvert_Types";
 import {
   computeCardCulvert,
   culvertLinkFor,
@@ -20,7 +20,7 @@ import {
   type RevetLinkControl,
   type RevetOffsetControl,
   type SpanValues,
-} from "./B06_Section_UI_Cross_Culvert_Wire";
+} from "./logic/B06_Section_Cross_Culvert_Wire";
 import { culvertCardState } from "./B06_Section_UI_Cross_View_Structure";
 import type { PipeRevetChoice } from "../A00_Common/design/design_structure_pipe_calc";
 
diff --git a/B06_Section/B06_Section_UI_Page_Span_Control.ts b/B06_Section/B06_Section_UI_Page_Span_Control.ts
index 1f9117023..28e4d7bf9 100644
--- a/B06_Section/B06_Section_UI_Page_Span_Control.ts
+++ b/B06_Section/B06_Section_UI_Page_Span_Control.ts
@@ -12,7 +12,7 @@ import {
   tierSpanOf,
   type SpanValues,
   type StructureSpanControl,
-} from "./B06_Section_UI_Cross_Culvert_Wire";
+} from "./logic/B06_Section_Cross_Culvert_Wire";
 import * as CulvertConst from "./logic/B06_Section_UI_Cross_Culvert_Const";
 import type { SessionCells } from "./B06_Section_Session_Cells";
 
diff --git a/B06_Section/B06_Section_UI_Page_Station_Controls.ts b/B06_Section/B06_Section_UI_Page_Station_Controls.ts
index 09ec48789..dbb997678 100644
--- a/B06_Section/B06_Section_UI_Page_Station_Controls.ts
+++ b/B06_Section/B06_Section_UI_Page_Station_Controls.ts
@@ -12,8 +12,8 @@ import type {
   StoredWallSpan,
 } from "./B06_Section_Api_Fetch";
 import type { InletStructureChoice, RevetKey, RevetPick } from "./B06_Section_UI_Cross_Culvert";
-import { DEFAULT_BASIN_ADJUST, ZERO_ADJUST } from "./B06_Section_UI_Cross_Culvert_Types";
-import type { BasinAdjust, WallAdjust } from "./B06_Section_UI_Cross_Culvert_Types";
+import { DEFAULT_BASIN_ADJUST, ZERO_ADJUST } from "./logic/B06_Section_Cross_Culvert_Types";
+import type { BasinAdjust, WallAdjust } from "./logic/B06_Section_Cross_Culvert_Types";
 import type {
   ExtraWallControl,
   InletStructureControl,
@@ -23,7 +23,11 @@ import type {
   StationWidthControl,
   StructureSpanControl,
 } from "./B06_Section_UI_Cross_View";
-import { culvertOwnerFor, culvertReach, wallStandsAt } from "./B06_Section_UI_Cross_Culvert_Wire";
+import {
+  culvertOwnerFor,
+  culvertReach,
+  wallStandsAt,
+} from "./logic/B06_Section_Cross_Culvert_Wire";
 import { createCulvertOptionWriter } from "./B06_Section_Api_Culvert_Options";
 import { createBodyControls } from "./B06_Section_UI_Page_Ford_Controls";
 import {
diff --git a/B06_Section/B06_Section_UI_Section_View.ts b/B06_Section/B06_Section_UI_Section_View.ts
index 3fc2d15c8..a6c46b5dc 100644
--- a/B06_Section/B06_Section_UI_Section_View.ts
+++ b/B06_Section/B06_Section_UI_Section_View.ts
@@ -46,8 +46,8 @@ import { cardZoomStates } from "./B06_Section_UI_Cross_View_Zoom";
 import { CROSS_GRID_GAP, CROSS_HEIGHT, createIdleQueue } from "./B06_Section_UI_Section_Common";
 import { eagerCardCount, pendingCard } from "./B06_Section_UI_Section_View_Lazy";
 import type { SectionStructureEdit } from "./B06_Section_UI_Section_View_Menu";
-import { culvertLinkFor as culvertLink } from "./B06_Section_UI_Cross_Culvert_Wire";
-import type { CulvertLink } from "./B06_Section_UI_Cross_Culvert_Wire";
+import { culvertLinkFor as culvertLink } from "./logic/B06_Section_Cross_Culvert_Wire";
+import type { CulvertLink } from "./logic/B06_Section_Cross_Culvert_Wire";
 import {
   CROSS_COLUMNS_BASE,
   CROSS_COLUMNS_MAX,
diff --git a/B06_Section/B06_Section_UI_Cross_Box_Geom.ts b/B06_Section/logic/B06_Section_Cross_Box_Geom.ts
similarity index 95%
rename from B06_Section/B06_Section_UI_Cross_Box_Geom.ts
rename to B06_Section/logic/B06_Section_Cross_Box_Geom.ts
index ff0268907..0d033643e 100644
--- a/B06_Section/B06_Section_UI_Cross_Box_Geom.ts
+++ b/B06_Section/logic/B06_Section_Cross_Box_Geom.ts
@@ -1,5 +1,5 @@
 /* =============================================================================
- * B06_Section_UI_Cross_Box_Geom.ts
+ * B06_Section_Cross_Box_Geom.ts
  * BOX암거 구체 **기하 계산** — 그리기(`_Cross_Box.ts`)와 분리(700줄 제한).
  * 백엔드 `section.box` 제원을 좌표로 옮긴다(치수 결정 금지).
  *
@@ -16,18 +16,18 @@
  * 부재 두께는 세월교 승계(측벽 0.2·상판 0.3·저판 0.3)이며 백엔드가 실어 보낸다.
  * ========================================================================== */
 
-import { groundLine } from "./B06_Section_UI_Cross_Wall_Hatch";
-import type { BoxSet, CrossSection, SectionSample } from "./B06_Section_Api_Fetch";
+import { groundLine } from "../B06_Section_UI_Cross_Wall_Hatch";
+import type { BoxSet, CrossSection, SectionSample } from "../B06_Section_Api_Fetch";
 import type {
   BasinLayout,
   CulvertDesignTrim,
   OffsetPoint,
   OutletFillSegment,
-} from "./B06_Section_UI_Cross_Culvert_Types";
-import { buildExtrasAt } from "./B06_Section_UI_Cross_Culvert_Extra";
-import { FILL_SLOPE_RATIO_MIN } from "./logic/B06_Section_UI_Cross_Culvert_Const";
-import { designInterpolator, groundInterpolator } from "./logic/B06_Section_UI_Cross_Culvert_Solve";
-import { structureCutPoints, structureCutSpec } from "./logic/B06_Section_UI_Cross_Structure_Cut";
+} from "./B06_Section_Cross_Culvert_Types";
+import { buildExtrasAt } from "./B06_Section_Cross_Culvert_Extra";
+import { FILL_SLOPE_RATIO_MIN } from "./B06_Section_UI_Cross_Culvert_Const";
+import { designInterpolator, groundInterpolator } from "./B06_Section_UI_Cross_Culvert_Solve";
+import { structureCutPoints, structureCutSpec } from "./B06_Section_UI_Cross_Structure_Cut";
 
 /** 구체 한쪽 끝의 조작값 — 좌·우를 따로 잡는다(2026-08-25 사용자). */
 export interface BoxSideAdjust {
diff --git a/B06_Section/logic/B06_Section_Cross_Culvert.ts b/B06_Section/logic/B06_Section_Cross_Culvert.ts
new file mode 100644
index 000000000..0e4098bef
--- /dev/null
+++ b/B06_Section/logic/B06_Section_Cross_Culvert.ts
@@ -0,0 +1,58 @@
+/* =============================================================================
+ * B06_Section_Cross_Culvert.ts
+ * 배수관 세트 기하 입구 — `computeCulvertLayout` · 고름 키 · 관 겹 꼭짓점.
+ * 그리기(`UI_Cross_Culvert.ts`)는 여기서 받은 좌표를 SVG 로 옮기기만 한다.
+ * ========================================================================== */
+
+import type { CulvertLayout, PipeEnd } from "./B06_Section_Cross_Culvert_Types";
+
+export { MIN_PIPE_COVER_M, computeCulvertLayout } from "./B06_Section_Cross_Culvert_Geom";
+export type {
+  BasinLayout,
+  BasinShape,
+  CulvertDesignTrim,
+  CulvertLayout,
+  EndFace,
+  InletStructureChoice,
+} from "./B06_Section_Cross_Culvert_Geom";
+
+/** 기슭막이 선택 키 — 측점 안에서 어느 벽인지 가린다. 추가 벽은 `extra{n}`. */
+// "own" = 배관과 무관한 **독립 기슭막이**(구조물 정본 D군). 조정창·조작값 저장은
+// 배관 벽과 같은 체계를 그대로 쓴다(2026-08-28 사용자: 배관측점처럼 이동).
+export type RevetKey = "inlet" | "outlet" | "own" | `extra${number}` | `bextra${number}`;
+/** 고름 전용 키 — 벽 키 + 관(118-1) · 도수로 띠(152-4) — 조정창 없음 · 강조만. 조정 함수에는 `RevetKey` 만. */
+export type RevetPick = RevetKey | "pipe" | "chute";
+
+// 미세한 틈 방지: 양 끝을 축 방향으로 아주 조금만 밀어 넣는다. 벽 전면이 1:0.3으로
+// 기울어 있어 크게 밀면 관 하단이 벽 **바깥으로 삐져나온다**(2026-08-20 사용자 ③
+// 위치 어긋남 원인) — 렌더링 틈만 덮을 만큼(2㎝)으로 줄였다.
+const OVERLAP_M = 0.02;
+
+/** 관 한 겹의 유입 · 유출 끝 — 축 법선으로 `delta`(m) 벌림(외경 = 관 두께 · 내경 = 0). */
+export function pipeShellCorners(layout: CulvertLayout, delta: number): [PipeEnd, PipeEnd] {
+  const { axis, normal } = layout.pipeAxis;
+  const pushOut = (corner: PipeEnd, dirSign: number): PipeEnd => ({
+    bottom: {
+      offset: corner.bottom.offset + dirSign * axis.offset * OVERLAP_M,
+      elevation: corner.bottom.elevation + dirSign * axis.elevation * OVERLAP_M,
+    },
+    top: {
+      offset: corner.top.offset + dirSign * axis.offset * OVERLAP_M,
+      elevation: corner.top.elevation + dirSign * axis.elevation * OVERLAP_M,
+    },
+  });
+  const shifted = (corner: PipeEnd): PipeEnd => ({
+    bottom: {
+      offset: corner.bottom.offset - normal.offset * delta,
+      elevation: corner.bottom.elevation - normal.elevation * delta,
+    },
+    top: {
+      offset: corner.top.offset + normal.offset * delta,
+      elevation: corner.top.elevation + normal.elevation * delta,
+    },
+  });
+  return [
+    shifted(pushOut(layout.pipeCorners.inlet, -1)),
+    shifted(pushOut(layout.pipeCorners.outlet, 1)),
+  ];
+}
diff --git a/B06_Section/B06_Section_UI_Cross_Culvert_Extra.ts b/B06_Section/logic/B06_Section_Cross_Culvert_Extra.ts
similarity index 98%
rename from B06_Section/B06_Section_UI_Cross_Culvert_Extra.ts
rename to B06_Section/logic/B06_Section_Cross_Culvert_Extra.ts
index facb70214..e5bf3639a 100644
--- a/B06_Section/B06_Section_UI_Cross_Culvert_Extra.ts
+++ b/B06_Section/logic/B06_Section_Cross_Culvert_Extra.ts
@@ -1,5 +1,5 @@
 /* =============================================================================
- * B06_Section_UI_Cross_Culvert_Extra.ts
+ * B06_Section_Cross_Culvert_Extra.ts
  * 유출측 **성토부선 + 추가 기슭막이(다단)** — Geom에서 분리(700줄 제한).
  *
  * 다단 기슭막이는 **1:1.2 고정 물매에서 안정적으로 성토고를 올리는 수단**이다
@@ -23,16 +23,16 @@ import {
   REVET_LEAN_RATIO,
   REVET_THICKNESS_M,
   WALL_MIN_PURE_HEIGHT_M,
-} from "./logic/B06_Section_UI_Cross_Culvert_Const";
+} from "./B06_Section_UI_Cross_Culvert_Const";
 import type {
   OffsetPoint,
   OutletFillSegment,
   WallAdjust,
   WallLayout,
-} from "./B06_Section_UI_Cross_Culvert_Types";
-import { structureCutPoints } from "./logic/B06_Section_UI_Cross_Structure_Cut";
-import type { StructureCutSpec } from "./logic/B06_Section_UI_Cross_Structure_Cut";
-import { buildRevetWallGeometry } from "./B06_Section_UI_Cross_Wall";
+} from "./B06_Section_Cross_Culvert_Types";
+import { structureCutPoints } from "./B06_Section_UI_Cross_Structure_Cut";
+import type { StructureCutSpec } from "./B06_Section_UI_Cross_Structure_Cut";
+import { buildRevetWallGeometry } from "../B06_Section_UI_Cross_Wall";
 
 export interface OutletExtrasInput {
   /** 성토부선 시작점 = 관 유출 하단 꼭짓점(배관 벽의 성토선 시작 자리). */
diff --git a/B06_Section/B06_Section_UI_Cross_Culvert_Geom.ts b/B06_Section/logic/B06_Section_Cross_Culvert_Geom.ts
similarity index 96%
rename from B06_Section/B06_Section_UI_Cross_Culvert_Geom.ts
rename to B06_Section/logic/B06_Section_Cross_Culvert_Geom.ts
index cab7ffa11..78ce55886 100644
--- a/B06_Section/B06_Section_UI_Cross_Culvert_Geom.ts
+++ b/B06_Section/logic/B06_Section_Cross_Culvert_Geom.ts
@@ -1,13 +1,13 @@
 /* =============================================================================
- * B06_Section_UI_Cross_Culvert_Geom.ts
+ * B06_Section_Cross_Culvert_Geom.ts
  * 배수관 세트(배관·기슭막이·성토부) **기하 계산** — 그리기(`_Cross_Culvert.ts`)와 분리.
  * 백엔드 `section.culvert` 제원을 좌표로 옮긴다(치수 결정 금지). 기슭막이는 전면
  * 1:n 평행사변형(n = 품셈 표준경사 · `outlineLeanOf`), 관 끝단면은 구조물 변과 평행, 성토 경사선은 벽 접점에서 끊는다
  * (designTrim). 유입 = 상단측. 집수정은 `_Basin.ts`, 성토부·다단은 `_Extra.ts`.
  * ========================================================================== */
 
-import { groundLine } from "./B06_Section_UI_Cross_Wall_Hatch";
-import type { CrossSection, CulvertSideSpec, SectionSample } from "./B06_Section_Api_Fetch";
+import { groundLine } from "../B06_Section_UI_Cross_Wall_Hatch";
+import type { CrossSection, CulvertSideSpec, SectionSample } from "../B06_Section_Api_Fetch";
 import {
   revetWallSpec,
   pipeWallDefaultD,
@@ -19,10 +19,10 @@ import {
   REVET_LEAN_RATIO,
   REVET_THICKNESS_M,
   revetTargetHeight,
-} from "./logic/B06_Section_UI_Cross_Culvert_Const";
-import type { RevetMaterial } from "./logic/B06_Section_UI_Cross_Culvert_Const";
-import { outlineLeanOf } from "./logic/B06_Section_UI_Cross_Lean";
-import { buildRevetWallGeometry } from "./B06_Section_UI_Cross_Wall";
+} from "./B06_Section_UI_Cross_Culvert_Const";
+import type { RevetMaterial } from "./B06_Section_UI_Cross_Culvert_Const";
+import { outlineLeanOf } from "./B06_Section_UI_Cross_Lean";
+import { buildRevetWallGeometry } from "../B06_Section_UI_Cross_Wall";
 import {
   bodyGuardAxes,
   bodyGuardBase,
@@ -30,8 +30,8 @@ import {
   bodyGuardHeight,
   fordPipeFit,
   mergeGuardTrim,
-} from "./B06_Section_UI_Cross_Body_Guard";
-import { ZERO_ADJUST } from "./B06_Section_UI_Cross_Culvert_Types";
+} from "../B06_Section_UI_Cross_Body_Guard";
+import { ZERO_ADJUST } from "./B06_Section_Cross_Culvert_Types";
 import type {
   BasinLayout,
   BasinAdjust,
@@ -42,12 +42,12 @@ import type {
   OffsetPoint,
   WallAdjust,
   WallLayout,
-} from "./B06_Section_UI_Cross_Culvert_Types";
-import { DEFAULT_BASIN_ADJUST } from "./B06_Section_UI_Cross_Culvert_Types";
+} from "./B06_Section_Cross_Culvert_Types";
+import { DEFAULT_BASIN_ADJUST } from "./B06_Section_Cross_Culvert_Types";
 
 // 상수·자료형은 분리 파일에 있고, 기존 import 경로를 유지하기 위해 그대로 다시 내보낸다.
-export * from "./logic/B06_Section_UI_Cross_Culvert_Const";
-export * from "./B06_Section_UI_Cross_Culvert_Types";
+export * from "./B06_Section_UI_Cross_Culvert_Const";
+export * from "./B06_Section_Cross_Culvert_Types";
 
 import {
   applyBasinPipeFill,
@@ -56,16 +56,16 @@ import {
   decideInletBasin,
   BASIN_INNER_WIDTH_M,
   inletChoiceAvailability,
-} from "./logic/B06_Section_UI_Cross_Culvert_Basin";
-import { floatFillStart, inletGroundConnector } from "./B06_Section_UI_Cross_Culvert_Extra";
-import { withBackCut } from "./logic/B06_Section_UI_Cross_Structure_Cut";
+} from "./B06_Section_UI_Cross_Culvert_Basin";
+import { floatFillStart, inletGroundConnector } from "./B06_Section_Cross_Culvert_Extra";
+import { withBackCut } from "./B06_Section_UI_Cross_Structure_Cut";
 import {
   buildCulvertTiers,
   drawnFillPoints,
   outletPipeEnd,
   slopeZeroAnchor,
-} from "./B06_Section_UI_Cross_Culvert_Tiers";
-import type { FillSlopeSegment, WallVertical } from "./logic/B06_Section_UI_Cross_Culvert_Solve";
+} from "./B06_Section_Cross_Culvert_Tiers";
+import type { FillSlopeSegment, WallVertical } from "./B06_Section_UI_Cross_Culvert_Solve";
 import {
   cutLength,
   fillSlopeOf,
@@ -75,7 +75,7 @@ import {
   pipeAxisSolver,
   placePipeWall,
   slopeLengthAlong,
-} from "./logic/B06_Section_UI_Cross_Culvert_Solve";
+} from "./B06_Section_UI_Cross_Culvert_Solve";
 
 /** 배수관 세트 기하 계산. 부족한 입력이면 null — 그리기와 분리(설계선 트림이 먼저 쓴다). */
 export function computeCulvertLayout(
diff --git a/B06_Section/B06_Section_UI_Cross_Culvert_Tiers.ts b/B06_Section/logic/B06_Section_Cross_Culvert_Tiers.ts
similarity index 91%
rename from B06_Section/B06_Section_UI_Cross_Culvert_Tiers.ts
rename to B06_Section/logic/B06_Section_Cross_Culvert_Tiers.ts
index 234def22d..e60c68376 100644
--- a/B06_Section/B06_Section_UI_Cross_Culvert_Tiers.ts
+++ b/B06_Section/logic/B06_Section_Cross_Culvert_Tiers.ts
@@ -1,22 +1,22 @@
 /* =============================================================================
- * B06_Section_UI_Cross_Culvert_Tiers.ts
+ * B06_Section_Cross_Culvert_Tiers.ts
  * 배수관 세트 기하(`_Cross_Culvert_Geom`)에서 떼어 낸 **벽 자리 도우미 + 다단 흙막이** 층.
  * 다단 벽은 `buildExtrasAt`(공용 `buildRevetWallGeometry`)이 세우고, 여기서는 유출측과
  * 집수정 계류측 두 채널의 입력을 짜고 면적용(미확정 단 제외) 결과를 함께 돌려준다.
  * ========================================================================== */
 
-import type { CrossSection } from "./B06_Section_Api_Fetch";
+import type { CrossSection } from "../B06_Section_Api_Fetch";
 import {
   GUARD_CUT_BERM_M,
   REVET_EMBED_DEPTH_M,
   REVET_FILL_TOP_M,
-} from "./logic/B06_Section_UI_Cross_Culvert_Const";
-import type { OutletExtrasResult } from "./B06_Section_UI_Cross_Culvert_Extra";
-import { buildExtrasAt } from "./B06_Section_UI_Cross_Culvert_Extra";
-import { fillWallBaseWidth } from "./logic/B06_Section_UI_Cross_Culvert_Solve";
-import type { OffsetPoint, WallAdjust, WallLayout } from "./B06_Section_UI_Cross_Culvert_Types";
-import { outlineLeanOf } from "./logic/B06_Section_UI_Cross_Lean";
-import { structureCutSpec } from "./logic/B06_Section_UI_Cross_Structure_Cut";
+} from "./B06_Section_UI_Cross_Culvert_Const";
+import type { OutletExtrasResult } from "./B06_Section_Cross_Culvert_Extra";
+import { buildExtrasAt } from "./B06_Section_Cross_Culvert_Extra";
+import { fillWallBaseWidth } from "./B06_Section_UI_Cross_Culvert_Solve";
+import type { OffsetPoint, WallAdjust, WallLayout } from "./B06_Section_Cross_Culvert_Types";
+import { outlineLeanOf } from "./B06_Section_UI_Cross_Lean";
+import { structureCutSpec } from "./B06_Section_UI_Cross_Structure_Cut";
 
 // d의 0점 = **성토선 길이 0 지점**(벽 상단 = 노견 — 2026-08-23 사용자 확정).
 // 그 자리(하단선 중점)는 이음선 상단점이 노견 끝에 오는 offset이고, 기본 자리는
diff --git a/B06_Section/logic/B06_Section_Cross_Culvert_Types.ts b/B06_Section/logic/B06_Section_Cross_Culvert_Types.ts
new file mode 100644
index 000000000..5aebe40c7
--- /dev/null
+++ b/B06_Section/logic/B06_Section_Cross_Culvert_Types.ts
@@ -0,0 +1,246 @@
+/* =============================================================================
+ * B06_Section_Cross_Culvert_Types.ts
+ * 배수관 세트 기하 **자료형** — 기하 계산(`_Cross_Culvert_Geom.ts`)에서 분리했다
+ * (700줄 제한). 계산·그리기 양쪽이 함께 쓴다(그리기 글 = `UI_Cross_Culvert_Types`).
+ * ========================================================================== */
+
+import type { CulvertSet } from "../B06_Section_Api_Fetch";
+import type { RevetMaterial } from "./B06_Section_UI_Cross_Culvert_Const";
+
+/**
+ * 기슭막이 1매의 사용자 조작값(2026-08-22 확정 4축):
+ *   x = 좌우(m, + = 계류측 바깥) — 노견(또는 윗단 시작점 수평선)을 늘려 평행이동,
+ *       성토선 물매 1:1.2 불변.
+ *   d = 상하(m, 수평 성분, + = 사면 아래) — 성토선을 타고 대각 이동.
+ *       **배관(유입·유출) 벽**은 0점 = 성토선 길이 0 지점(벽 상단 = 노견)인
+ *       절대값(2026-08-23 사용자 확정), null = 기본 자리(성토선 0 지점 · 79-5).
+ *       추가 벽은 종전대로 자동 자리 기준 상대값(null = 0).
+ *   h = 높이(m). 배관 벽은 **순수 높이**(바닥~상단, 관 아래 0.5 포함 —
+ *       2026-08-23), 추가 벽은 계산용(근입 0.5 위 기준선~상단). null = 기본값
+ *       (배관 관경+1.0·일반 1.5, 재질 한계로 잘림).
+ *   m = 재질. null = 기본값(메쌓기). 한계: 메 2.0 / 찰 3.0 / 콘크리트 5.0.
+ */
+export interface WallAdjust {
+  x: number;
+  d: number | null;
+  h: number | null;
+  /** 형태(`REVET_FORMS` 문자열). 옛 저장분은 재질 코드(dry/wet/concrete) — `revetFormOf`가 옮긴다. */
+  m: string | null;
+}
+
+/** 조작값 기본(전부 자동). */
+export const ZERO_ADJUST: WallAdjust = { x: 0, d: null, h: null, m: null };
+
+export interface OffsetPoint {
+  offset: number;
+  elevation: number;
+}
+
+/** 점들을 감싸는 가상 사각형 — 고르기 판정면만(그림 아님) · 세월교 측벽 ㄴ(79-6) · 집수정(190-1). */
+export function outlineBox(points: OffsetPoint[]): OffsetPoint[] {
+  const offsets = points.map((point) => point.offset);
+  const elevations = points.map((point) => point.elevation);
+  const [left, right] = [Math.max(...offsets), Math.min(...offsets)];
+  const [top, bottom] = [Math.max(...elevations), Math.min(...elevations)];
+  return [
+    { offset: left, elevation: top },
+    { offset: right, elevation: top },
+    { offset: right, elevation: bottom },
+    { offset: left, elevation: bottom },
+  ];
+}
+
+/** 설계선(성토 경사) 트림 범위 — 이 밖은 벽·보호공이 대신하므로 그리지 않는다. */
+export interface CulvertDesignTrim {
+  minOffset: number;
+  maxOffset: number;
+  /** 트림 경계에서 성토 경사선이 **닿아야 할 표고**(= 벽 이음선 상단점). 없으면 설계선 그대로. */
+  minElevation?: number;
+  maxElevation?: number;
+  /**
+   * 노견 → (노폭 연장) → 벽 이음선 상단점 폴리라인. 물매가 1:1.2 고정이라 벽이 밖으로
+   * 나간 만큼 **노폭이 늘어난다** — 그 연장 구간이 가운데 점으로 들어온다.
+   */
+  minSlope?: { points: OffsetPoint[] };
+  maxSlope?: { points: OffsetPoint[] };
+}
+
+export interface WallLayout {
+  role: "inlet" | "outlet" | "extra";
+  /** 추가 기슭막이 번호(role === "extra"일 때만) — 조정창 키 `extra{n}`이 된다. */
+  extraIndex?: number;
+  form: string | null;
+  lengthM: number | null;
+  /** 배면(도로측) 바닥 offset. */
+  backOffset: number;
+  /** 전면(계류측) 바닥 offset. */
+  outerOffset: number;
+  base: number;
+  /** 벽 높이(m) = **계산용**(관 invert~상단, 근입 제외 — 2026-08-22 사용자 확정).
+   *  기초는 시공 시 묻히는 부분이라 높이 표기·한계 검사(찰 3.0/메 2.0) 모두 이 기준. */
+  height: number;
+  /**
+   * 바닥이 원지반에서 뜬 간격(m, 2026-08-22 사용자 확정). 손으로 안쪽에 당겨 높이
+   * 한계로도 사면선에 못 닿을 때 바닥을 띄워 최소 노견을 확보한다 — 뜬 공간은
+   * 별도 지지 구조물로 메운다(추가 예정). 0이면 지반 위(근입 0.5m).
+   */
+  floatGapM: number;
+  /** 좌우 이동의 **하한**(m, 2026-09-07). 선반 길이가 음수가 되지 않게 x 는 최소
+   *  `1.2 × 상하 내림`까지 따라 나간다. 요청이 이 값보다 작으면 눌러도 벽이 안 움직임 —
+   *  그 까닭을 툴팁으로 알린다. */
+  shiftFloorM?: number;
+  /** 재질(메/찰/콘크리트) — 높이 한계를 정한다(2026-08-22 사용자). */
+  material: RevetMaterial;
+  /** 전면 기울기 1:n 의 n — 품셈 13-4-4 [주]⑪ 표준경사(`wallLeanRatio`, B08 과 한 벌 · 2026-09-14). */
+  lean: number;
+  outward: number;
+  /** 합성 단면(하부 사다리꼴 + 상부 평행사변형) 꼭짓점 — 데이터 좌표. */
+  points: OffsetPoint[];
+  /** 상단 배면 꼭짓점 — 성토 사면선과의 접점(설계선 트림 경계). */
+  topBack: OffsetPoint;
+  /** 이음선 상단점(평행사변형↔사다리꼴 상단 교차점) — 안 무늬 이음선 자리. */
+  topJoint: OffsetPoint;
+  /** 성토 위 이음 — 윗면 사면 쪽 끝에서 0.1 m 안(371-1). 성토 사면선이 여기서 끝난다. */
+  fillTop: OffsetPoint;
+  /** 하단선 양 끝 — **수평 기초**(2026-08-22 사용자 확정): 발자국 최저 지반(또는 관
+   *  invert) − 0.5m 표고의 수평선. 전면 발끝은 1:0.3 경사선을 하단까지 연장한 자리다. */
+  bottomBack: OffsetPoint;
+  bottomFront: OffsetPoint;
+  /** 옹벽(구조물 `retaining_wall`) — 안 무늬에 물빼기 파이프 단면을 더함(73-2). */
+  retaining?: boolean;
+}
+
+/**
+ * 유입 집수정 단면 — 실무 도면(2026-08-20 사용자 제공 L형 확대본) 기준.
+ *   · **I형** = 기슭막이와 같은 **평행사변형 벽 1매**만.
+ *   · **ㄴ(L)형** = I형 + **바닥판**.
+ *   · **ㄷ형** = ㄴ형 + I형 **반대측 막음벽**.
+ * 돌 표현은 재질 확정 시 반영 예정(성토부 기슭막이와 동일 규칙) — 지금은 윤곽만.
+ */
+export type BasinShape = "I" | "L" | "U";
+
+export interface BasinLayout {
+  shape: BasinShape;
+  /** 부재별 폴리곤(벽·바닥·막음벽). 각각 분리 도형으로 그린다. */
+  parts: Array<{ kind: "wall" | "floor"; points: OffsetPoint[] }>;
+  label: OffsetPoint;
+  /** 자동 전환 사유 — 툴팁·라벨에 쓴다(2026-08-22 재정의: 성토사면 ≤3m 기준).
+   *  "cut" = 절토측 유입(성토사면 없음), "short" = 성토사면 3m 이하,
+   *  "manual" = 규칙상 기슭막이 자리지만 사용자가 집수정을 선택. */
+  reason: "cut" | "short" | "manual";
+  /** 집수정이 원지반 안으로 들어갈 때의 절토선 점열(구조물 바깥 끝 → 복합경사 → 지반 교차점 · 91-4). */
+  cutLine: OffsetPoint[] | null;
+  /** 구조물이 원지반 밖으로 나올 때의 성토(되메움)선 — 경사 5도(임시), 지반 교차점까지. */
+  fillLine: { from: OffsetPoint; to: OffsetPoint } | null;
+}
+
+/** 측점별 집수정 조정값. 위치값은 기본 배치 기준이며 +는 계류측/사면 아래 방향이다. */
+export interface BasinAdjust {
+  innerWidthM: number;
+  innerHeightM: number;
+  lateralM: number;
+  slopeM: number;
+}
+
+export const DEFAULT_BASIN_ADJUST: BasinAdjust = {
+  innerWidthM: 1.0,
+  innerHeightM: 1.2,
+  lateralM: 0,
+  slopeM: 0,
+};
+
+/** 관 끝단을 자를 마감면 — 구조물(기슭막이·집수정)의 계류측 변을 **그대로 복사**한다. */
+export interface EndFace {
+  base: OffsetPoint;
+  direction: { offset: number; elevation: number };
+}
+
+/** 관 한쪽 끝단의 두 꼭짓점(마감면에서 자른 결과). */
+export interface PipeEnd {
+  bottom: OffsetPoint;
+  top: OffsetPoint;
+}
+
+/**
+ * 유출측 **성토부선** 한 구간(2026-08-22 사용자 — 보호공 삭제, 윗면 선만 성토부선으로).
+ * 관 하단 꼭짓점(또는 앞 추가 벽 전면 상단)에서 1:1.2로 원지반(또는 다음 벽)까지.
+ */
+export interface OutletFillSegment {
+  points: OffsetPoint[];
+  lengthM: number;
+  /** 구간 물매(1:n) — 벽 사이 구간은 높이 역산으로 정확히 1.2다. */
+  ratio?: number;
+  /** 선 성격(2026-08-22 사용자 ②③): fill = 성토선(기본), cut = 0도/접속 절토선. */
+  kind?: "fill" | "cut";
+  /** 사면길이 5m 이상 — 기슭막이 의무 구간(별표2·성토_비탈면 §2). */
+  overLimit: boolean;
+}
+
+export interface CulvertLayout {
+  culvert: CulvertSet;
+  /** 원지반 — 도수로 · 돌붙임 길이가 사면보다 길면 이어 그림(294-4). */
+  ground?: OffsetPoint[];
+  pipe: { inlet: OffsetPoint; outlet: OffsetPoint; lengthM: number; slopePct: number };
+  /** 관 축·법선 단위벡터(그리기가 두께 방향으로 밀 때 쓴다). */
+  pipeAxis: { axis: OffsetPoint; normal: OffsetPoint };
+  /** 관 양 끝단 꼭짓점 — 보호공 시작점이 유출 하단 꼭짓점을 그대로 쓴다. */
+  pipeCorners: { inlet: PipeEnd; outlet: PipeEnd };
+  walls: WallLayout[];
+  /** 유출측 성토사면 — 경사길이(m)·법정 5m 충족 여부(별표2)·풀어낸 물매(1:n). */
+  fillSlope: {
+    lengthM: number;
+    withinLimit: boolean;
+    /** 사면선이 벽 이음선 상단점을 지나도록 역산한 물매. 범위 밖이면 끝값으로 고정. */
+    ratio: number;
+    /** 물매가 1.2~2.0 범위를 벗어났는지 — 도면 경고용. */
+    ratioClamped: boolean;
+    /** 물매 1:1.2를 지키려고 늘린 **노폭 연장량**(m, 편측). 0이면 연장 없음. */
+    roadWideningM: number;
+    /**
+     * 기슭막이만으로는 성토를 받을 수 없는 자리(성토고 3m↑인데 사면 5m·물매 1:1.2를
+     * 동시에 만족하는 벽 자리가 없다) — **옹벽·석축 등 구조물 검토 대상**
+     * (`성토_비탈면.md` §2 "5m 초과 시 구조물 설치 의무").
+     */
+    structureRequired: boolean;
+  };
+  /** 유출측 성토부선(보호공 대체 — 2026-08-22). 끝 구간이 5m 이상이면 추가 가능. */
+  outletFill: { segments: OutletFillSegment[]; addable: boolean };
+  /** 유입 집수정(ㄴ·ㄷ형) 계류측 성토부선 — 유출측과 같은 체계(2026-08-22 사용자). */
+  basinFill: { segments: OutletFillSegment[]; addable: boolean };
+  /** 집수정 계류측 다단 기슭막이 — 조정창 키 `bextra{n}`. */
+  basinExtras: WallLayout[];
+  /** 한계에 잘린 뒤의 **실제 적용된** 집수정 조작값 — 조정창이 되받는다. */
+  basinAdjust: BasinAdjust;
+  /** 유입 기슭막이의 관 시작 접속선(2026-08-22 ②) — 위면 0도 성토선(지반 정지),
+   *  아래면 0도 1m 후 표준 절토 경사선. 집수정·접속 불필요면 null. */
+  inletFill: OutletFillSegment | null;
+  /** 추가 기슭막이(배관 없는 벽 — 계단식). 조정창 키 = `extra{n}`. */
+  extraWalls: WallLayout[];
+  /** 유입 집수정 단면(있을 때만). */
+  basin: BasinLayout | null;
+  designTrim: CulvertDesignTrim | null;
+  /**
+   * **실제 적용된** 기슭막이 이동량(m, + = 계류측 바깥). 요청값이 노견·사면 역전·사면 끝
+   * 한계에 걸리면 잘려 들어온다 — 조정창은 이 값을 보여 주고 저장한다. 그러지 않으면
+   * 눌러도 안 움직이는데 숫자만 계속 커진다(2026-08-21 사용자 지적).
+   */
+  revetShift: {
+    inlet: WallAdjust;
+    outlet: WallAdjust;
+    extras: WallAdjust[];
+    /** 집수정 계류측 다단의 적용 조작값. */
+    basinExtras: WallAdjust[];
+  };
+  /**
+   * 조정창 드롭다운 선택지 가용성(2026-08-22 사용자 — 상황에 안 맞는 선택지 숨김):
+   * revetAllowed = 기슭막이+배관(배관이 원지반에 안 묻힐 때만),
+   * basinLUAllowed = 집수정 ㄴ·ㄷ형(구조물이 원지반으로 밀고 들어갈 때만).
+   */
+  inletOptions: { revetAllowed: boolean; basinLUAllowed: boolean };
+  /** 세월교 · 박스 흙막이(73-4) — 본체 끝 자리의 배관 4축 x(적용 x 의 0점). 본체 없으면 없음. */
+  bodyX?: { inlet: number; outlet: number } | null;
+  /** 유입 · 유출 벽의 순수 높이(m) — 높이 빈 칸인 연동 옆 카드가 물려받음(152-2). */
+  pureHeights?: { inlet: number; outlet: number };
+}
+/** 유입측 구조물 사용자 선택 — auto = 규칙 기반 자동 선택. */
+export type InletStructureChoice = "auto" | "revet" | "I" | "L" | "U";
diff --git a/B06_Section/B06_Section_UI_Cross_Culvert_Wire.ts b/B06_Section/logic/B06_Section_Cross_Culvert_Wire.ts
similarity index 98%
rename from B06_Section/B06_Section_UI_Cross_Culvert_Wire.ts
rename to B06_Section/logic/B06_Section_Cross_Culvert_Wire.ts
index 7e1a8b209..b725818d2 100644
--- a/B06_Section/B06_Section_UI_Cross_Culvert_Wire.ts
+++ b/B06_Section/logic/B06_Section_Cross_Culvert_Wire.ts
@@ -1,27 +1,27 @@
 /* =============================================================================
- * B06_Section_UI_Cross_Culvert_Wire.ts
+ * B06_Section_Cross_Culvert_Wire.ts
  * 횡단 카드의 배수관 세트 **계산 호출 + 이동량 되받기(토스트)** — Cross_View에서
  * 분리(700줄 제한). 카드가 다시 그려질 때마다 한 번 불린다.
  * ========================================================================== */
 
-import { bodyAbsolute } from "./B06_Section_UI_Cross_Body_Guard";
-import type { CrossSection, SectionSample } from "./B06_Section_Api_Fetch";
-import { computeCulvertLayout } from "./B06_Section_UI_Cross_Culvert";
+import { bodyAbsolute } from "../B06_Section_UI_Cross_Body_Guard";
+import type { CrossSection, SectionSample } from "../B06_Section_Api_Fetch";
+import { computeCulvertLayout } from "./B06_Section_Cross_Culvert";
 import type {
   CulvertLayout,
   InletStructureChoice,
   RevetKey,
   RevetPick,
-} from "./B06_Section_UI_Cross_Culvert";
-import type { BasinAdjust, CulvertDesignTrim } from "./B06_Section_UI_Cross_Culvert_Types";
+} from "./B06_Section_Cross_Culvert";
+import type { BasinAdjust, CulvertDesignTrim } from "./B06_Section_Cross_Culvert_Types";
 import {
   basinSpanOfSpec,
   FILL_SLOPE_RATIO_MIN,
   revetSpanOfSpec,
-} from "./logic/B06_Section_UI_Cross_Culvert_Const";
-import { EXTRA_SPAN_DEFAULT } from "./logic/B06_Section_UI_Cross_Culvert_Const";
-import type { StructureSpan } from "./logic/B06_Section_UI_Cross_Culvert_Const";
-import type { WallAdjust } from "./B06_Section_UI_Cross_Culvert_Types";
+} from "./B06_Section_UI_Cross_Culvert_Const";
+import { EXTRA_SPAN_DEFAULT } from "./B06_Section_UI_Cross_Culvert_Const";
+import type { StructureSpan } from "./B06_Section_UI_Cross_Culvert_Const";
+import type { WallAdjust } from "./B06_Section_Cross_Culvert_Types";
 import type { LocaleKey } from "@ui/ui_template_locale";
 /**
  * 기슭막이 4축 조작 제어(2026-08-22 확정) — 벽을 눌러 고르고 조정창에서
diff --git a/B06_Section/B06_Section_UI_Cross_Ford_Geom.ts b/B06_Section/logic/B06_Section_Cross_Ford_Geom.ts
similarity index 95%
rename from B06_Section/B06_Section_UI_Cross_Ford_Geom.ts
rename to B06_Section/logic/B06_Section_Cross_Ford_Geom.ts
index dd456b134..0bc888f49 100644
--- a/B06_Section/B06_Section_UI_Cross_Ford_Geom.ts
+++ b/B06_Section/logic/B06_Section_Cross_Ford_Geom.ts
@@ -1,5 +1,5 @@
 /* =============================================================================
- * B06_Section_UI_Cross_Ford_Geom.ts
+ * B06_Section_Cross_Ford_Geom.ts
  * 세월교 구체 **기하 계산** — 그리기(`_Cross_Ford.ts`)와 분리(700줄 제한).
  * 백엔드 `section.ford` 제원을 좌표로 옮긴다(치수 결정 금지).
  *
@@ -19,19 +19,19 @@
  * 성토측이라도 기슭막이 세트(다단·재질)와는 연계하지 않는다.
  * ========================================================================== */
 
-import { groundLine } from "./B06_Section_UI_Cross_Wall_Hatch";
-import type { CrossSection, FordSet, SectionSample } from "./B06_Section_Api_Fetch";
-import { GUARD_CUT_BERM_M, pipeWallThicknessM } from "./logic/B06_Section_UI_Cross_Culvert_Const";
+import { groundLine } from "../B06_Section_UI_Cross_Wall_Hatch";
+import type { CrossSection, FordSet, SectionSample } from "../B06_Section_Api_Fetch";
+import { GUARD_CUT_BERM_M, pipeWallThicknessM } from "./B06_Section_UI_Cross_Culvert_Const";
 import type {
   BasinLayout,
   CulvertDesignTrim,
   OffsetPoint,
   OutletFillSegment,
-} from "./B06_Section_UI_Cross_Culvert_Types";
-import { basinApproachPoints, buildBasin } from "./logic/B06_Section_UI_Cross_Culvert_Basin";
-import { bermCut, buildExtrasAt } from "./B06_Section_UI_Cross_Culvert_Extra";
-import { designInterpolator, groundInterpolator } from "./logic/B06_Section_UI_Cross_Culvert_Solve";
-import { structureCutSpec } from "./logic/B06_Section_UI_Cross_Structure_Cut";
+} from "./B06_Section_Cross_Culvert_Types";
+import { basinApproachPoints, buildBasin } from "./B06_Section_UI_Cross_Culvert_Basin";
+import { bermCut, buildExtrasAt } from "./B06_Section_Cross_Culvert_Extra";
+import { designInterpolator, groundInterpolator } from "./B06_Section_UI_Cross_Culvert_Solve";
+import { structureCutSpec } from "./B06_Section_UI_Cross_Structure_Cut";
 
 /** 측벽 한 매의 조작값 — 좌우만(139-3). `heightM` · `slopeM` 은 옛 저장(측벽마다 높이 · 1:1.2
  *  대각) 읽기 전용 — `dropM` 이 없을 때 바닥판 표고로 옮김(`fordDropOf`). */
diff --git a/B06_Section/logic/B06_Section_Cross_Ford_Pavement.ts b/B06_Section/logic/B06_Section_Cross_Ford_Pavement.ts
new file mode 100644
index 000000000..e345d213c
--- /dev/null
+++ b/B06_Section/logic/B06_Section_Cross_Ford_Pavement.ts
@@ -0,0 +1,118 @@
+/* =============================================================================
+ * B06_Section_Cross_Ford_Pavement.ts
+ * 물넘이포장 기하 — 유입 쪽 · 노면 양 끝 · 월류 높이선 · 유출측 성토사면 선(287-2 · 294 · 315).
+ * 그리기는 `UI_Cross_Ford_Pavement.ts` · 3D 띠(B05)도 같은 선을 씀.
+ * ========================================================================== */
+
+import type { CrossDesign } from "../B06_Section_Api_Fetch";
+import type { OffsetPoint } from "./B06_Section_Cross_Culvert_Types";
+
+/** 백엔드 `section.ford_pavement` 제원(치수 결정은 서버 몫 — 여기서는 좌표만 만든다). */
+export interface FordPavementSpec {
+  /** 관 지점 누가거리 — 폭 절반 걸친 옆 카드도 같은 값. */
+  chainage_m?: number;
+  span_m: number;
+  /** 월류 높이(m) — 노면 위 점선. 없으면 점선을 안 그림(수치를 지어내지 않는다). */
+  depth_m: number | null;
+  /** 노면 경사(%) — 경사각도 환산 · 서버 설계 노면이 이 값으로 기욺. */
+  slope_pct: number | null;
+  /** 정본에 안 적혀 기본값으로 그린 칸 「이름 값」 — 카드 머리에 「기본값(미확정)」. */
+  defaulted?: string[];
+  /** 도수로 · 돌붙임(`ford_chute_{n}_*` · 136-2) — 유출측 성토사면 띠 · 길이 = 사면 따라(286-3 · 비면 원지반까지). */
+  chute?: { structure: string; thickness_m: number; length_m?: number };
+}
+
+/** 유입(상류)이 좌측(+offset)인가 — 기울인 노면이면 높은 노면 끝 · 아니면 설계선 양 끝 표고가 높은
+ *  쪽(286-2) · 같으면 단면유형. */
+export function inflowLeft(design: CrossDesign): boolean {
+  const edges = design.road_edges;
+  if (design.tilted && edges && Math.abs(edges.left.elevation_m - edges.right.elevation_m) > 1e-6)
+    return edges.left.elevation_m > edges.right.elevation_m;
+  const line = [...(design.design_line ?? [])].sort((a, b) => a.offset_m - b.offset_m);
+  const gap = line.length >= 2 ? line[line.length - 1].elevation_m - line[0].elevation_m : 0;
+  return Math.abs(gap) > 1e-3 ? gap > 0 : design.section_mode !== "right_cut";
+}
+
+/** 콘크리트 · 노면 양 끝 — 낮은 쪽을 늘였으면(294-3 `tilt_reach`) 그 쪽은 원지반과 만난 자리까지. */
+export function fordEdges(design: CrossDesign): CrossDesign["road_edges"] | undefined {
+  const edges = design.road_edges;
+  const reach = design.tilt_reach;
+  if (!edges || !reach) return edges;
+  const end = { offset_m: reach.offset_m, elevation_m: reach.elevation_m };
+  return reach.side === "left" ? { ...edges, left: end } : { ...edges, right: end };
+}
+
+/**
+ * 월류 높이선(315-2) — 노면 양 끝 위 월류 높이 · 노면과 같은 각도. 성토 쪽(노면 끝 밖 설계선이 내려감)은
+ * 성토 사면선을 노면 끝 너머 위 · 안쪽으로 늘여 월류 높이선과 만나는 자리에서 끝 → 노면 끝까지 그 연장선.
+ * 절토 쪽 · 늘인 노면 끝(294-3)은 노면 끝 위 그대로. 좌(+offset) → 우 차례.
+ */
+export function overflowLine(design: CrossDesign, depth: number): OffsetPoint[] {
+  const edges = fordEdges(design);
+  if (!edges) return [];
+  const { left, right } = edges;
+  const span = Math.abs(left.offset_m - right.offset_m);
+  const side = (edge: typeof left, other: typeof left): OffsetPoint[] => {
+    const top = { offset: edge.offset_m, elevation: edge.elevation_m + depth };
+    const outward = Math.sign(edge.offset_m - other.offset_m) || 1;
+    const next = (design.design_line ?? [])
+      .filter((p) => (p.offset_m - edge.offset_m) * outward > 1e-6)
+      .sort((a, b) => (a.offset_m - b.offset_m) * outward)[0];
+    const cut = edge.offset_m === design.tilt_reach?.offset_m; // 늘인 끝 = 원지반(294-3 · 절토)
+    if (cut || !next || next.elevation_m >= edge.elevation_m - 1e-6 || span < 1e-9) return [top];
+    // 안쪽 d m 에서 성토선 = edge + fill·d · 월류선 = edge + depth + road·d → d = depth / (fill − road)
+    const fill = (edge.elevation_m - next.elevation_m) / Math.abs(next.offset_m - edge.offset_m);
+    const road = (other.elevation_m - edge.elevation_m) / span;
+    if (fill <= road + 1e-9) return [top];
+    const d = Math.min(depth / (fill - road), span);
+    const meet = { offset: edge.offset_m - outward * d, elevation: edge.elevation_m + fill * d };
+    return [{ offset: edge.offset_m, elevation: edge.elevation_m }, meet];
+  };
+  return [...side(left, right), ...side(right, left).reverse()];
+}
+
+/** 원지반 꺾은선의 그 오프셋 표고(밖은 끝값). */
+function groundZ(ground: readonly OffsetPoint[], offset: number): number | null {
+  if (!ground.length) return null;
+  if (offset <= ground[0].offset) return ground[0].elevation;
+  for (let i = 1; i < ground.length; i += 1) {
+    const [a, b] = [ground[i - 1], ground[i]];
+    if (offset > b.offset) continue;
+    const span = b.offset - a.offset;
+    return span > 1e-9
+      ? a.elevation + ((b.elevation - a.elevation) * (offset - a.offset)) / span
+      : b.elevation;
+  }
+  return ground[ground.length - 1].elevation;
+}
+
+/**
+ * 유출측(낮은 쪽) 성토사면 선(136-2 · 294-4) — 낮은 쪽 끝단(늘인 노면 끝 · 아니면 유출 쪽 노견 끝)에서
+ * 설계선을 바깥으로 따라 내려가는 동안만(오르면 절토라 멈춤) · 원지반(`ground`)에 닿으면 끝.
+ * 성토가 없으면(끝단이 이미 원지반 · 양측 절토 물넘이) 점 하나 = 띠 없음.
+ */
+export function outletFillLine(
+  design: CrossDesign,
+  ground?: readonly OffsetPoint[],
+): OffsetPoint[] {
+  const edges = fordEdges(design);
+  if (!edges || !design.design_line?.length) return [];
+  const reach = design.tilt_reach;
+  const outLeft = reach ? reach.side === "left" : !inflowLeft(design); // +offset = 좌측
+  const outward = outLeft ? 1 : -1;
+  const edge = outLeft
+    ? Math.max(edges.left.offset_m, edges.right.offset_m)
+    : Math.min(edges.left.offset_m, edges.right.offset_m);
+  const points = design.design_line
+    .filter((p) => (p.offset_m - edge) * outward >= -1e-6)
+    .sort((a, b) => (a.offset_m - b.offset_m) * outward);
+  const line: OffsetPoint[] = [];
+  for (const p of points) {
+    const last = line[line.length - 1];
+    if (last && p.elevation_m > last.elevation + 1e-6) break;
+    line.push({ offset: p.offset_m, elevation: p.elevation_m });
+    const z = ground ? groundZ(ground, p.offset_m) : null;
+    if (z !== null && Math.abs(z - p.elevation_m) < 1e-3) break; // 원지반에 닿음 = 끝
+  }
+  return line;
+}
diff --git a/B06_Section/logic/B06_Section_UI_Cross_Culvert_Basin.ts b/B06_Section/logic/B06_Section_UI_Cross_Culvert_Basin.ts
index 0bf390a13..1abdaa324 100644
--- a/B06_Section/logic/B06_Section_UI_Cross_Culvert_Basin.ts
+++ b/B06_Section/logic/B06_Section_UI_Cross_Culvert_Basin.ts
@@ -33,7 +33,7 @@ import type {
   EndFace,
   OffsetPoint,
   InletStructureChoice,
-} from "../B06_Section_UI_Cross_Culvert_Types";
+} from "./B06_Section_Cross_Culvert_Types";
 import { structureCutPoints, structureCutSpec } from "./B06_Section_UI_Cross_Structure_Cut";
 
 /** 자동(기본) 집수정 모양(54-36) — 좌측 폼 「(기본)」 표시도 이 값. */
diff --git a/B06_Section/logic/B06_Section_UI_Cross_Culvert_Const.ts b/B06_Section/logic/B06_Section_UI_Cross_Culvert_Const.ts
index 1c04150e9..e29972def 100644
--- a/B06_Section/logic/B06_Section_UI_Cross_Culvert_Const.ts
+++ b/B06_Section/logic/B06_Section_UI_Cross_Culvert_Const.ts
@@ -5,7 +5,7 @@
  * ========================================================================== */
 
 import type { CrossSection, CulvertSideSpec } from "../B06_Section_Api_Fetch";
-import type { SpanRole, SpanValues } from "../B06_Section_UI_Cross_Culvert_Wire";
+import type { SpanRole, SpanValues } from "./B06_Section_Cross_Culvert_Wire";
 
 /** 관 위 최소 토피(m) — 프론트 정의처(백엔드는 `B06_Section_Engine_Culvert.MIN_PIPE_COVER_M`).
  *  ⚠ 임도 배수관 토피 규정이 지식DB에 없어 별표2 교량·암거 "복토 50㎝ 이상"을 교차
diff --git a/B06_Section/logic/B06_Section_UI_Cross_Culvert_Solve.ts b/B06_Section/logic/B06_Section_UI_Cross_Culvert_Solve.ts
index 1827b9473..1c20c58dd 100644
--- a/B06_Section/logic/B06_Section_UI_Cross_Culvert_Solve.ts
+++ b/B06_Section/logic/B06_Section_UI_Cross_Culvert_Solve.ts
@@ -13,12 +13,7 @@ import {
   REVET_THICKNESS_M,
   REVET_FILL_TOP_M,
 } from "./B06_Section_UI_Cross_Culvert_Const";
-import type {
-  EndFace,
-  OffsetPoint,
-  PipeEnd,
-  WallAdjust,
-} from "../B06_Section_UI_Cross_Culvert_Types";
+import type { EndFace, OffsetPoint, PipeEnd, WallAdjust } from "./B06_Section_Cross_Culvert_Types";
 
 /** 기슭막이 하단선 폭(m) — 사다리꼴 밑변. 자리 기준(하단선 중점) 환산에 쓴다.
  *  `lean` = 그 벽의 전면 기울기(표준경사 · `revetWallSpec().lean`). */
diff --git a/B06_Section/logic/B06_Section_UI_Cross_Structure_Cut.ts b/B06_Section/logic/B06_Section_UI_Cross_Structure_Cut.ts
index e23394541..183bdacc2 100644
--- a/B06_Section/logic/B06_Section_UI_Cross_Structure_Cut.ts
+++ b/B06_Section/logic/B06_Section_UI_Cross_Structure_Cut.ts
@@ -11,7 +11,7 @@
 import { cutProfilePoints } from "../../common_util/common_util_cross_berm";
 import type { BermSpec } from "../../common_util/common_util_cross_berm";
 import type { CrossDesign } from "../B06_Section_Api_Fetch";
-import type { OffsetPoint } from "../B06_Section_UI_Cross_Culvert_Types";
+import type { OffsetPoint } from "./B06_Section_Cross_Culvert_Types";
 
 /** 절토 제원 — 암(또는 단일) 경사 · 토사 경사 · 암 경계 오프셋(없으면 경사 하나) · 소단. */
 export interface StructureCutSpec {
diff --git a/B06_Section/logic/B06_Section_UI_Page_Patches.ts b/B06_Section/logic/B06_Section_UI_Page_Patches.ts
index 28a5ffba6..f7a54fe8a 100644
--- a/B06_Section/logic/B06_Section_UI_Page_Patches.ts
+++ b/B06_Section/logic/B06_Section_UI_Page_Patches.ts
@@ -8,10 +8,10 @@
  * ========================================================================== */
 
 import type { CrossSectionPatch, StoredWallAdjust, StoredWallSpan } from "../B06_Section_Api_Fetch";
-import type { BasinAdjust } from "../B06_Section_UI_Cross_Culvert_Types";
-import type { FordAdjust } from "../B06_Section_UI_Cross_Ford";
-import type { BoxAdjust } from "../B06_Section_UI_Cross_Box";
-import type { InletStructureChoice } from "../B06_Section_UI_Cross_Culvert";
+import type { BasinAdjust } from "./B06_Section_Cross_Culvert_Types";
+import type { FordAdjust } from "./B06_Section_Cross_Ford_Geom";
+import type { BoxAdjust } from "./B06_Section_Cross_Box_Geom";
+import type { InletStructureChoice } from "./B06_Section_Cross_Culvert";
 
 export interface CrossPatchSources {
   /** 암 경계선 오프셋(누가거리 문자열 키). */
diff --git a/resources/tester/helper_118_pipe_pick.cjs b/resources/tester/helper_118_pipe_pick.cjs
index 6b38ffe6a..addb2be25 100644
--- a/resources/tester/helper_118_pipe_pick.cjs
+++ b/resources/tester/helper_118_pipe_pick.cjs
@@ -122,7 +122,7 @@ const resolve = (base) =>
 const B06 = (f) => path.join(ROOT, "B06_Section", `${f}.ts`);
 const { computeStoredLayouts } = loadTs(B06("B06_Section_Structure_Layouts"));
 const { appendCulvertOverlay } = loadTs(B06("B06_Section_UI_Cross_Culvert"));
-const { wallStandsAt } = loadTs(B06("B06_Section_UI_Cross_Culvert_Wire"));
+const { wallStandsAt } = loadTs(B06("logic/B06_Section_Cross_Culvert_Wire"));
 const { applyStructurePick } = loadTs(B06("B06_Section_UI_Page_Structure_Pick"));
 
 const fixture = JSON.parse(
diff --git a/resources/tester/helper_135_3_chute_solid.cjs b/resources/tester/helper_135_3_chute_solid.cjs
index 5cb934254..84e8c90d2 100644
--- a/resources/tester/helper_135_3_chute_solid.cjs
+++ b/resources/tester/helper_135_3_chute_solid.cjs
@@ -33,9 +33,9 @@ const { buildCorridorStructures } = loadTs(B05("B05_Profile_UI_Corridor_Structur
 const { structureHashParts } = loadTs(B05("logic/B05_Profile_UI_Corridor_Structures_Hash"));
 const { structureTopLoops } = loadTs(B05("logic/B05_Profile_UI_Corridor_Tin_Design"));
 const { chuteBandOutline, isChuteSegment } = loadTs(B06("B06_Section_UI_Cross_Wall_Hatch"));
-const { computeBoxLayout } = loadTs(B06("B06_Section_UI_Cross_Box_Geom"));
+const { computeBoxLayout } = loadTs(B06("logic/B06_Section_Cross_Box_Geom"));
 const { computeFordLayout } = loadTs(B06("B06_Section_UI_Cross_Ford"));
-const { outletFillLine } = loadTs(B06("B06_Section_UI_Cross_Ford_Pavement"));
+const { outletFillLine } = loadTs(B06("logic/B06_Section_Cross_Ford_Pavement"));
 
 const fixture = JSON.parse(
   fs.readFileSync(path.join(__dirname, "fixtures", "b06_73_4_body_guard_sections.json"), "utf8"),
diff --git a/resources/tester/helper_139_2_link_freeze.cjs b/resources/tester/helper_139_2_link_freeze.cjs
index 7a820194a..6c36377bf 100644
--- a/resources/tester/helper_139_2_link_freeze.cjs
+++ b/resources/tester/helper_139_2_link_freeze.cjs
@@ -27,7 +27,9 @@ const resolve = (base) =>
 
 const B06 = (f) => path.join(ROOT, "B06_Section", f);
 const { freezeLinkedWalls } = loadTs(B06("B06_Section_UI_Page_Link_Session.ts"));
-const { computeCardCulvert, culvertLinkFor } = loadTs(B06("B06_Section_UI_Cross_Culvert_Wire.ts"));
+const { computeCardCulvert, culvertLinkFor } = loadTs(
+  B06("logic/B06_Section_Cross_Culvert_Wire.ts"),
+);
 
 const sections = JSON.parse(
   fs.readFileSync(path.join(__dirname, "fixtures", "b06_73_4_body_guard_sections.json"), "utf8"),
diff --git a/resources/tester/helper_139_3_ford_level.cjs b/resources/tester/helper_139_3_ford_level.cjs
index e17cfb285..d87feebfb 100644
--- a/resources/tester/helper_139_3_ford_level.cjs
+++ b/resources/tester/helper_139_3_ford_level.cjs
@@ -19,7 +19,7 @@ const { loadTs } = makeLoader({
 });
 
 const { computeFordLayout, fordAdjustOf } = loadTs(
-  path.join(ROOT, "B06_Section", "B06_Section_UI_Cross_Ford_Geom.ts"),
+  path.join(ROOT, "B06_Section", "logic/B06_Section_Cross_Ford_Geom.ts"),
 );
 const sections = JSON.parse(
   fs.readFileSync(path.join(__dirname, "fixtures", "b06_73_4_body_guard_sections.json"), "utf8"),
diff --git a/resources/tester/helper_139_6_pipe_fit.cjs b/resources/tester/helper_139_6_pipe_fit.cjs
index e340f2916..f01bcaf55 100644
--- a/resources/tester/helper_139_6_pipe_fit.cjs
+++ b/resources/tester/helper_139_6_pipe_fit.cjs
@@ -30,7 +30,7 @@ const { computeCrossDesign } = loadTs(
   path.join(ROOT, "common_util", "common_util_cross_design.ts"),
 );
 const { computeCulvertLayout, REVET_EMBED_DEPTH_M } = loadTs(
-  path.join(ROOT, "B06_Section", "B06_Section_UI_Cross_Culvert_Geom.ts"),
+  path.join(ROOT, "B06_Section", "logic/B06_Section_Cross_Culvert_Geom.ts"),
 );
 const { cutLength } = loadTs(
   path.join(ROOT, "B06_Section", "logic", "B06_Section_UI_Cross_Culvert_Solve.ts"),
diff --git a/resources/tester/helper_186_1_outlet_fold.cjs b/resources/tester/helper_186_1_outlet_fold.cjs
index 0b754a8b7..efbc5ddd0 100644
--- a/resources/tester/helper_186_1_outlet_fold.cjs
+++ b/resources/tester/helper_186_1_outlet_fold.cjs
@@ -31,7 +31,7 @@ const resolve = (base) =>
 
 const B06 = (f) => path.join(ROOT, "B06_Section", f);
 const { computeStoredLayouts, structureAreaRows } = loadTs(B06("B06_Section_Structure_Layouts.ts"));
-const { computeCulvertLayout } = loadTs(B06("B06_Section_UI_Cross_Culvert_Geom.ts"));
+const { computeCulvertLayout } = loadTs(B06("logic/B06_Section_Cross_Culvert_Geom.ts"));
 const read = (name) =>
   JSON.parse(fs.readFileSync(path.join(__dirname, "fixtures", name), "utf8")).cross_sections;
 const clone = (v) => JSON.parse(JSON.stringify(v));
diff --git a/resources/tester/helper_190_1_basin_pick.cjs b/resources/tester/helper_190_1_basin_pick.cjs
index 2206c2fae..97af1a297 100644
--- a/resources/tester/helper_190_1_basin_pick.cjs
+++ b/resources/tester/helper_190_1_basin_pick.cjs
@@ -82,7 +82,7 @@ const resolve = (base) =>
 const B06 = (f) => path.join(ROOT, "B06_Section", `${f}.ts`);
 const { computeStoredLayouts } = loadTs(B06("B06_Section_Structure_Layouts"));
 const { appendCulvertOverlay } = loadTs(B06("B06_Section_UI_Cross_Culvert"));
-const { outlineBox } = loadTs(B06("B06_Section_UI_Cross_Culvert_Types"));
+const { outlineBox } = loadTs(B06("logic/B06_Section_Cross_Culvert_Types"));
 
 const fixture = JSON.parse(
   fs.readFileSync(path.join(__dirname, "fixtures", "b07_cross_overlay_sections.json"), "utf8"),
diff --git a/resources/tester/helper_225_1_pipe_round.cjs b/resources/tester/helper_225_1_pipe_round.cjs
index 92f1b33fb..161a7f0a4 100644
--- a/resources/tester/helper_225_1_pipe_round.cjs
+++ b/resources/tester/helper_225_1_pipe_round.cjs
@@ -62,7 +62,7 @@ const { loadTs } = makeLoader({
 });
 
 const B06 = (name) => loadTs(path.join(ROOT, "B06_Section", `${name}.ts`));
-const { computeCulvertLayout } = B06("B06_Section_UI_Cross_Culvert_Geom");
+const { computeCulvertLayout } = B06("logic/B06_Section_Cross_Culvert_Geom");
 const { cutLength } = B06("logic/B06_Section_UI_Cross_Culvert_Solve");
 const { pipeLengthText, pipeLengthWhole } = B06("logic/B06_Section_UI_Cross_Culvert_Const");
 const { appendPipeInfoText } = B06("B06_Section_UI_Cross_Culvert_Types");
diff --git a/resources/tester/helper_271_detail_notify.cjs b/resources/tester/helper_271_detail_notify.cjs
index d84bc67eb..3650fa4a1 100644
--- a/resources/tester/helper_271_detail_notify.cjs
+++ b/resources/tester/helper_271_detail_notify.cjs
@@ -115,9 +115,9 @@ const STUBS = {
   "B06_Section_Cross_Design_Session.ts": anyModule(),
   "common_util_cross_design.ts": anyModule(),
   "B06_Section_Structure_Layouts.ts": anyModule({ computeStoredLayouts: () => null }),
-  "B06_Section_UI_Cross_Culvert_Wire.ts": anyModule(),
-  "B06_Section_UI_Cross_Ford_Geom.ts": anyModule(),
-  "B06_Section_UI_Cross_Box_Geom.ts": anyModule(),
+  "B06_Section_Cross_Culvert_Wire.ts": anyModule(),
+  "B06_Section_Cross_Ford_Geom.ts": anyModule(),
+  "B06_Section_Cross_Box_Geom.ts": anyModule(),
   "B06_Section_UI_Cross_View.ts": anyModule(),
   "B06_Section_UI_Section_Common.ts": anyModule({ designElevationAt: () => undefined }),
   "B06_Section_Display_Width.ts": anyModule({ displayHalfWidth: () => 10 }),
diff --git a/resources/tester/helper_286_1_ford_pavement.cjs b/resources/tester/helper_286_1_ford_pavement.cjs
index af326b295..af0df99f1 100644
--- a/resources/tester/helper_286_1_ford_pavement.cjs
+++ b/resources/tester/helper_286_1_ford_pavement.cjs
@@ -29,6 +29,9 @@ const ford = loadTs(path.join(ROOT, "B06_Section", "B06_Section_UI_Cross_Ford_Pa
     { "./logic/B06_Section_UI_Cross_Culvert_Const": {} },
   ),
   "./B06_Section_UI_Cross_Design_Surface": { appendPavementOverlay() {} },
+  "./logic/B06_Section_Cross_Ford_Pavement": loadTs(
+    path.join(ROOT, "B06_Section", "logic", "B06_Section_Cross_Ford_Pavement.ts"),
+  ),
   // 관 신원표(323-5 · 472-2 에서 common_util 로) — 진짜 · 장부 안 꽂음 = 옛 자리 이름
   "../common_util/common_util_pick_tag": loadTs(
     path.join(ROOT, "common_util", "common_util_pick_tag.ts"),
diff --git a/resources/tester/helper_287_ford_pavement.cjs b/resources/tester/helper_287_ford_pavement.cjs
index e0c0faf0b..95720a713 100644
--- a/resources/tester/helper_287_ford_pavement.cjs
+++ b/resources/tester/helper_287_ford_pavement.cjs
@@ -73,6 +73,7 @@ class Node {
 }
 globalThis.document = { createElementNS: (_ns, tag) => new Node(tag) };
 const pave = load(path.join(ROOT, "B06_Section", "B06_Section_UI_Cross_Ford_Pavement.ts"));
+const paveGeo = load(path.join(ROOT, "B06_Section", "logic", "B06_Section_Cross_Ford_Pavement.ts"));
 // 서버가 지대 낮은 쪽(우)으로 5 % 기울인 노면 · 노견 끝 ±3 · 차도 끝 ±2.5
 const tilted = {
   section_mode: "left_cut",
@@ -244,7 +245,7 @@ const out = {
   drew,
   pavePoints: ofClass("b06-chart__ford-pavement").map((k) => k.attrs.points),
   planPoints: ofClass("b06-chart__ford-deck-plan").map((k) => k.attrs.points),
-  inflowLeft: pave.inflowLeft(tilted),
+  inflowLeft: paveGeo.inflowLeft(tilted),
   // 287-3 월류 폭 → 높이 = 세월교와 같은 풀이(유량 1.2 ㎥/s · 폭 10 m) · 유량 없으면 null(손 입력)
   heightByWidth: calc.fordHeightM(1.2, 10),
   heightNoFlow: calc.fordHeightM(null, 10),
diff --git a/resources/tester/helper_294_3_ford_extend_chute.cjs b/resources/tester/helper_294_3_ford_extend_chute.cjs
index d4a04dc54..532c595be 100644
--- a/resources/tester/helper_294_3_ford_extend_chute.cjs
+++ b/resources/tester/helper_294_3_ford_extend_chute.cjs
@@ -44,6 +44,7 @@ globalThis.document = { createElementNS: (_ns, tag) => new Node(tag) };
 
 const input = JSON.parse(fs.readFileSync(process.argv[2], "utf8"));
 const pave = load(path.join(ROOT, "B06_Section", "B06_Section_UI_Cross_Ford_Pavement.ts"));
+const paveGeo = load(path.join(ROOT, "B06_Section", "logic", "B06_Section_Cross_Ford_Pavement.ts"));
 const design = input.design; // 서버가 낸 양측 절토 · 낮은 쪽 연장 설계
 const svg = new Node("g");
 pave.appendFordPavementOverlay(
@@ -70,18 +71,18 @@ const fordPave = load(
 );
 
 const out = {
-  edges: pave.fordEdges(design),
+  edges: paveGeo.fordEdges(design),
   pavePoints: paveLayer?.attrs.points ?? null,
   runNone: pts(hatch.chuteRun(slope)),
   runShort: pts(hatch.chuteRun(slope, 2)),
   runLong: pts(hatch.chuteRun(slope, 7, flat)),
   runPointOnly: pts(hatch.chuteRun([{ points: [P(3, -4)] }])),
   runPointLength: pts(hatch.chuteRun([{ points: [P(3, -4)] }], 2, flat)),
-  dipLine: pave.outletFillLine(design, dipGround),
+  dipLine: paveGeo.outletFillLine(design, dipGround),
   dipChute: pave.fordChuteLine(design, {}, dipGround),
   dipChuteLength: pave.fordChuteLine(design, { length_m: 1.5 }, dipGround),
-  fillLine: pave.outletFillLine(input.fillDesign, fillGround),
-  fillLineOld: pave.outletFillLine(input.fillDesign),
+  fillLine: paveGeo.outletFillLine(input.fillDesign, fillGround),
+  fillLineOld: paveGeo.outletFillLine(input.fillDesign),
   fillChuteLength: pave.fordChuteLine(input.fillDesign, { length_m: 1 }, fillGround),
   chuteItems: guard.CHUTE_ITEMS.map((i) => i.id),
   fordPaveChuteSame:
diff --git a/resources/tester/helper_315_ford_chute_overflow.cjs b/resources/tester/helper_315_ford_chute_overflow.cjs
index f32a65852..ade0c7b0a 100644
--- a/resources/tester/helper_315_ford_chute_overflow.cjs
+++ b/resources/tester/helper_315_ford_chute_overflow.cjs
@@ -44,6 +44,7 @@ globalThis.document = { createElementNS: (_ns, tag) => new Node(tag) };
 
 const input = JSON.parse(fs.readFileSync(process.argv[2], "utf8"));
 const pave = load(path.join(ROOT, "B06_Section", "B06_Section_UI_Cross_Ford_Pavement.ts"));
+const paveGeo = load(path.join(ROOT, "B06_Section", "logic", "B06_Section_Cross_Ford_Pavement.ts"));
 const hatch = load(path.join(ROOT, "B06_Section", "B06_Section_UI_Cross_Wall_Hatch.ts"));
 const fillGround = hatch.groundLine(input.fillSamples);
 const dipGround = hatch.groundLine(input.dipSamples);
@@ -73,10 +74,10 @@ const out = {
   fillLong: chute(input.fillDesign, fillGround, 6),
   dipNone: chute(input.dipDesign, dipGround),
   dipLong: chute(input.dipDesign, dipGround, 2),
-  fillOverflow: pave.overflowLine(input.fillDesign, 0.3),
-  dipOverflow: pave.overflowLine(input.dipDesign, 0.3),
-  fillEdges: pave.fordEdges(input.fillDesign),
-  dipEdges: pave.fordEdges(input.dipDesign),
+  fillOverflow: paveGeo.overflowLine(input.fillDesign, 0.3),
+  dipOverflow: paveGeo.overflowLine(input.dipDesign, 0.3),
+  fillEdges: paveGeo.fordEdges(input.fillDesign),
+  dipEdges: paveGeo.fordEdges(input.dipDesign),
   deckPoints: deck?.attrs.points ?? null,
   bandPoints: band?.attrs.points ?? null,
 };
diff --git a/resources/tester/helper_371_2_pipe_slope.cjs b/resources/tester/helper_371_2_pipe_slope.cjs
index fd4d9d855..d9d34e441 100644
--- a/resources/tester/helper_371_2_pipe_slope.cjs
+++ b/resources/tester/helper_371_2_pipe_slope.cjs
@@ -62,7 +62,7 @@ const { loadTs } = makeLoader({
 });
 
 const { computeCulvertLayout } = loadTs(
-  path.join(ROOT, "B06_Section", "B06_Section_UI_Cross_Culvert_Geom.ts"),
+  path.join(ROOT, "B06_Section", "logic/B06_Section_Cross_Culvert_Geom.ts"),
 );
 const { appendCulvertOverlay } = loadTs(
   path.join(ROOT, "B06_Section", "B06_Section_UI_Cross_Culvert.ts"),
diff --git a/resources/tester/helper_387_4b_pipe_options.cjs b/resources/tester/helper_387_4b_pipe_options.cjs
index af8cf6a80..e00142047 100644
--- a/resources/tester/helper_387_4b_pipe_options.cjs
+++ b/resources/tester/helper_387_4b_pipe_options.cjs
@@ -46,7 +46,7 @@ const B06 = (f) => path.join(ROOT, "B06_Section", `${f}.ts`);
 const { structureAreaRows, computeStoredLayouts } = loadTs(B06("B06_Section_Structure_Layouts"));
 const { layPipeOptions } = loadTs(B06("B06_Section_Section_Adjusts"));
 const { applyPipeOptionsToCache } = loadTs(B06("B06_Section_UI_Page_Pipe_Options"));
-const { ZERO_ADJUST } = loadTs(B06("B06_Section_UI_Cross_Culvert_Types"));
+const { ZERO_ADJUST } = loadTs(B06("logic/B06_Section_Cross_Culvert_Types"));
 
 const fresh = () =>
   JSON.parse(fs.readFileSync(path.join(__dirname, "fixtures", "b06_186_1_pipe_292.json"), "utf8"))
diff --git a/resources/tester/helper_387_8_folded_profile.cjs b/resources/tester/helper_387_8_folded_profile.cjs
index 061435904..09240b930 100644
--- a/resources/tester/helper_387_8_folded_profile.cjs
+++ b/resources/tester/helper_387_8_folded_profile.cjs
@@ -87,9 +87,9 @@ const STUBS = {
   "B06_Section_UI_Standard_Panel.ts": anyModule(),
   "B06_Section_Cross_Design_Session.ts": anyModule(),
   "common_util_cross_design.ts": anyModule(),
-  "B06_Section_UI_Cross_Culvert_Wire.ts": anyModule(),
-  "B06_Section_UI_Cross_Ford_Geom.ts": anyModule(),
-  "B06_Section_UI_Cross_Box_Geom.ts": anyModule(),
+  "B06_Section_Cross_Culvert_Wire.ts": anyModule(),
+  "B06_Section_Cross_Ford_Geom.ts": anyModule(),
+  "B06_Section_Cross_Box_Geom.ts": anyModule(),
   "B06_Section_UI_IrregularStations.ts": anyModule({ PIPE_DISPLAY_NAME: {} }),
   "B05_Profile_UI_IrregularStations.ts": anyModule({ PIPE_DISPLAY_NAME: {} }),
   "config_frontend.ts": anyModule({ PIPE_TYPES: [] }),
diff --git a/resources/tester/helper_416_page_cache.cjs b/resources/tester/helper_416_page_cache.cjs
index 4f1881d64..d4b88a998 100644
--- a/resources/tester/helper_416_page_cache.cjs
+++ b/resources/tester/helper_416_page_cache.cjs
@@ -82,9 +82,9 @@ const STUBS = {
   "B06_Section_Cross_Design_Session.ts": anyModule(),
   "common_util_cross_design.ts": anyModule(),
   "B06_Section_Structure_Layouts.ts": anyModule({ computeStoredLayouts: () => null }),
-  "B06_Section_UI_Cross_Culvert_Wire.ts": anyModule(),
-  "B06_Section_UI_Cross_Ford_Geom.ts": anyModule(),
-  "B06_Section_UI_Cross_Box_Geom.ts": anyModule(),
+  "B06_Section_Cross_Culvert_Wire.ts": anyModule(),
+  "B06_Section_Cross_Ford_Geom.ts": anyModule(),
+  "B06_Section_Cross_Box_Geom.ts": anyModule(),
   "B06_Section_UI_Cross_View.ts": anyModule(),
   "B06_Section_UI_Section_Common.ts": anyModule({ designElevationAt: () => undefined }),
   "B06_Section_Display_Width.ts": anyModule({ displayHalfWidth: () => 10 }),
diff --git a/resources/tester/helper_445_save_patch.cjs b/resources/tester/helper_445_save_patch.cjs
index 6ebdeb7f5..4b7840c89 100644
--- a/resources/tester/helper_445_save_patch.cjs
+++ b/resources/tester/helper_445_save_patch.cjs
@@ -71,7 +71,7 @@ const load = makeLoader(
     B06("B06_Section_UI_Page_Station_Controls"),
     B06("B06_Section_UI_Page_Link_Session"),
     B06("B06_Section_Session_Cells"), // 조정창 칸 창구(472-5 5-D · 메모리 맵 없음)
-    B06("B06_Section_UI_Cross_Culvert_Types"),
+    B06("logic/B06_Section_Cross_Culvert_Types"),
     B06("logic/B06_Section_Station_Swap"),
     B06("logic/B06_Section_UI_Page_Patches"),
     B06("logic/B06_Section_Design_Keys"), // 칸 목록 · 얹기 · patch 꼴 한 벌(472-6)
diff --git a/resources/tester/helper_451_refresh_hold.cjs b/resources/tester/helper_451_refresh_hold.cjs
index 0e5168b9c..0baf96b6c 100644
--- a/resources/tester/helper_451_refresh_hold.cjs
+++ b/resources/tester/helper_451_refresh_hold.cjs
@@ -71,9 +71,9 @@ const STUBS = {
   "B06_Section_Cross_Design_Session.ts": anyModule({ crossDesignChoices: () => new Map() }),
   "B06_Section_Section_Adjusts.ts": anyModule({ withPipeOptions: async () => undefined }),
   "common_util_cross_design.ts": anyModule(),
-  "B06_Section_UI_Cross_Culvert_Wire.ts": anyModule(),
-  "B06_Section_UI_Cross_Ford_Geom.ts": anyModule(),
-  "B06_Section_UI_Cross_Box_Geom.ts": anyModule(),
+  "B06_Section_Cross_Culvert_Wire.ts": anyModule(),
+  "B06_Section_Cross_Ford_Geom.ts": anyModule(),
+  "B06_Section_Cross_Box_Geom.ts": anyModule(),
   "B06_Section_UI_IrregularStations.ts": anyModule({ PIPE_DISPLAY_NAME: {} }),
   "B05_Profile_UI_IrregularStations.ts": anyModule({ PIPE_DISPLAY_NAME: {} }),
   "config_frontend.ts": anyModule({ PIPE_TYPES: [] }),
diff --git a/resources/tester/helper_451_session_canon.cjs b/resources/tester/helper_451_session_canon.cjs
index 3a11f3709..16cb7e1c5 100644
--- a/resources/tester/helper_451_session_canon.cjs
+++ b/resources/tester/helper_451_session_canon.cjs
@@ -69,9 +69,9 @@ const STUBS = {
   "B06_Section_Cross_Design_Session.ts": anyModule({ crossDesignChoices: () => new Map() }),
   "B06_Section_Section_Adjusts.ts": anyModule({ withPipeOptions: async () => undefined }),
   "common_util_cross_design.ts": anyModule(),
-  "B06_Section_UI_Cross_Culvert_Wire.ts": anyModule(),
-  "B06_Section_UI_Cross_Ford_Geom.ts": anyModule(),
-  "B06_Section_UI_Cross_Box_Geom.ts": anyModule(),
+  "B06_Section_Cross_Culvert_Wire.ts": anyModule(),
+  "B06_Section_Cross_Ford_Geom.ts": anyModule(),
+  "B06_Section_Cross_Box_Geom.ts": anyModule(),
   "B06_Section_UI_IrregularStations.ts": anyModule({ PIPE_DISPLAY_NAME: {} }),
   "B05_Profile_UI_IrregularStations.ts": anyModule({ PIPE_DISPLAY_NAME: {} }),
   "config_frontend.ts": anyModule({ PIPE_TYPES: [] }),
diff --git a/resources/tester/helper_79_guard_shape.cjs b/resources/tester/helper_79_guard_shape.cjs
index b0b53c880..d2d283790 100644
--- a/resources/tester/helper_79_guard_shape.cjs
+++ b/resources/tester/helper_79_guard_shape.cjs
@@ -31,8 +31,8 @@ const resolve = (base) =>
 const B06 = (f) => path.join(ROOT, "B06_Section", f);
 const { computeStoredLayouts, structureAreaRows } = loadTs(B06("B06_Section_Structure_Layouts.ts"));
 const { bodyGuardBase } = loadTs(B06("B06_Section_UI_Cross_Body_Guard.ts"));
-const { computeBoxLayout } = loadTs(B06("B06_Section_UI_Cross_Box_Geom.ts"));
-const { computeCulvertLayout } = loadTs(B06("B06_Section_UI_Cross_Culvert_Geom.ts"));
+const { computeBoxLayout } = loadTs(B06("logic/B06_Section_Cross_Box_Geom.ts"));
+const { computeCulvertLayout } = loadTs(B06("logic/B06_Section_Cross_Culvert_Geom.ts"));
 const { computeRevetmentLayout } = loadTs(B06("B06_Section_UI_Cross_Revetment.ts"));
 
 const fixture = JSON.parse(
diff --git a/resources/tester/helper_91_ground_free.cjs b/resources/tester/helper_91_ground_free.cjs
index ae12a5ccf..7d8e959b6 100644
--- a/resources/tester/helper_91_ground_free.cjs
+++ b/resources/tester/helper_91_ground_free.cjs
@@ -80,7 +80,7 @@ out.fordHandBedDown = fordFloor((s) => {
   shiftGround(s, -2, -2, 2);
 });
 // ② 91-3 다단 자동 자리 — 관 180 유출 흙막이 + 2단 · 원지반을 옮겨도 단 자리 같음 · 사면 1.0 m
-const { computeCulvertLayout } = loadTs(B06("B06_Section_UI_Cross_Culvert_Geom.ts"));
+const { computeCulvertLayout } = loadTs(B06("logic/B06_Section_Cross_Culvert_Geom.ts"));
 function tiers(dz) {
   const s = clone(at(180));
   shiftGround(s, dz);
@@ -139,8 +139,8 @@ function guardTails(base, edit = () => undefined) {
 }
 out.guardTails = [...guardTails(at(352.14)), ...guardTails(FORD)];
 // 박스 끝 · 세월교 측벽 끝(흙막이 없음)
-const { computeBoxLayout } = loadTs(B06("B06_Section_UI_Cross_Box_Geom.ts"));
-const { computeFordLayout } = loadTs(B06("B06_Section_UI_Cross_Ford_Geom.ts"));
+const { computeBoxLayout } = loadTs(B06("logic/B06_Section_Cross_Box_Geom.ts"));
+const { computeFordLayout } = loadTs(B06("logic/B06_Section_Cross_Ford_Geom.ts"));
 function endCuts(base, compute) {
   const s = clone(base);
   delete s.culvert;
diff --git a/resources/tester/test_139_4_buried_outlet.py b/resources/tester/test_139_4_buried_outlet.py
index 259e980a9..866c76887 100644
--- a/resources/tester/test_139_4_buried_outlet.py
+++ b/resources/tester/test_139_4_buried_outlet.py
@@ -1,6 +1,6 @@
 """PLAN 139-4 · 139-5 — 묻힌 흙막이 유출 끝 = 3도 수평 절토선(보라 · 절토 면적) · 못 만나면 복합경사.
 
-짝: `B06_Section/B06_Section_UI_Cross_Culvert_Extra.ts`(끝 구간 규칙) · `_Culvert_Tiers.ts`(채널 입력) ·
+짝: `B06_Section/logic/B06_Section_Cross_Culvert_Extra.ts`(끝 구간 규칙) · `_Culvert_Tiers.ts`(채널 입력) ·
 `_Culvert_Geom.ts`(유출 절토선 면적에 넣음) · `_Culvert.ts`(그림 · 툴팁). 실제 TS 를 `helper_139_4_buried_outlet.cjs` 가 돌린다.
 """
 
@@ -68,7 +68,7 @@ def test_유출_절토선은_그리고_면적에_넣음() -> None:
     culvert = _src("B06_Section/B06_Section_UI_Cross_Culvert.ts")
     assert 'if (segment.kind === "cut" && !culvert.body) continue;' not in culvert
     assert 'planLine(segment.points, cutLineTip("유출부", segment));' in culvert
-    geom = _src("B06_Section/B06_Section_UI_Cross_Culvert_Geom.ts")
+    geom = _src("B06_Section/logic/B06_Section_Cross_Culvert_Geom.ts")
     assert "extendTrimSlope(drawnFillPoints(extrasForArea, true), outletInfo.outward);" in geom
     # 집수정 계류측 3도 선은 그림만(면적 밖) — 세월교 · 박스 계류측만 면적
     assert (
diff --git a/resources/tester/test_152_2_link_height.py b/resources/tester/test_152_2_link_height.py
index d0945ba5f..bec28cbff 100644
--- a/resources/tester/test_152_2_link_height.py
+++ b/resources/tester/test_152_2_link_height.py
@@ -51,5 +51,5 @@ def test_풀린_카드_이_측점_높이_줄() -> None:
     dock = _src("B06_Section/B06_Section_UI_Adjust_Dock.ts")
     assert 'const OWN_HEIGHT_ROW = ".b06-structure-panel__struct--own-height";' in dock
     assert "return OWN_HEIGHT_ROW;" in dock  # 세월교 · 박스 날개벽 칸도 받음
-    wire = _src("B06_Section/B06_Section_UI_Cross_Culvert_Wire.ts")
+    wire = _src("B06_Section/logic/B06_Section_Cross_Culvert_Wire.ts")
     assert "h: shift.inlet.h ?? heights.inlet" in wire
diff --git a/resources/tester/test_190_1_basin_pick.py b/resources/tester/test_190_1_basin_pick.py
index cea785514..89d52fb8c 100644
--- a/resources/tester/test_190_1_basin_pick.py
+++ b/resources/tester/test_190_1_basin_pick.py
@@ -1,7 +1,7 @@
 """PLAN 190-1 — B06 집수정 고르기 판정면 = 부재 외곽 가상 사각형(세월교 측벽 ㄴ 꼴 · 79-6).
 
 짝: `B06_Section/B06_Section_UI_Cross_Culvert.ts`(집수정 판정면) · `_Cross_Ford.ts`(측벽 판정면) ·
-`_Cross_Culvert_Types.ts`(`outlineBox` 한 벌). [상세] 모달은 카드 그림 복제라 같은 판정면을 가짐.
+`logic/B06_Section_Cross_Culvert_Types.ts`(`outlineBox` 한 벌). [상세] 모달은 카드 그림 복제라 같은 판정면을 가짐.
 실제 TS 를 `helper_190_1_basin_pick.cjs` 가 Node 로 돌린다.
 """
 
@@ -76,7 +76,7 @@ def test_고름_없으면_판정면_없음(out) -> None:
 
 
 def test_세월교_측벽과_같은_함수() -> None:
-    types = _src("B06_Section/B06_Section_UI_Cross_Culvert_Types.ts")
+    types = _src("B06_Section/logic/B06_Section_Cross_Culvert_Types.ts")
     assert "export function outlineBox(points: OffsetPoint[]): OffsetPoint[] {" in types
     ford = _src("B06_Section/B06_Section_UI_Cross_Ford.ts")
     assert 'polygon(outlineBox(points), "b06-chart__culvert-revet-hit", "")' in ford
diff --git a/resources/tester/test_193_1_line_axis.py b/resources/tester/test_193_1_line_axis.py
index 9a6e59951..23a1fec8d 100644
--- a/resources/tester/test_193_1_line_axis.py
+++ b/resources/tester/test_193_1_line_axis.py
@@ -107,7 +107,7 @@ def test_서버_한쪽_이동_반대측_고정_바깥으로() -> None:
 
 def test_구조물은_노견_끝에_섬() -> None:
     """관 기슭막이 자리 = 설계 노견 끝(`road_edges` · 노견 확장 포함) — 사면과 한 벌로 감."""
-    src = (ROOT / "B06_Section" / "B06_Section_UI_Cross_Culvert_Geom.ts").read_text(
+    src = (ROOT / "B06_Section" / "logic/B06_Section_Cross_Culvert_Geom.ts").read_text(
         encoding="utf-8"
     )
     assert "const edges = section.design?.road_edges;" in src
diff --git a/resources/tester/test_433_19_20_span_cad.py b/resources/tester/test_433_19_20_span_cad.py
index a03c49530..3d1f7ce50 100644
--- a/resources/tester/test_433_19_20_span_cad.py
+++ b/resources/tester/test_433_19_20_span_cad.py
@@ -21,7 +21,7 @@ def test_구간값_제어에_culvertopt_큐_쓰기_없음():
     span = _read("B06_Section_UI_Page_Span_Control.ts")
     assert "culvertOptions" not in span
     assert "update: (section, role" not in span
-    wire = _read("B06_Section_UI_Cross_Culvert_Wire.ts")
+    wire = _read("logic/B06_Section_Cross_Culvert_Wire.ts")
     assert not re.search(r"^\s*update: \(section: CrossSection, role", wire, re.M)
     view = _read("B06_Section_UI_Cross_View_Structure.ts")
     assert "structureSpan?.update(" not in view
diff --git a/resources/tester/test_472_3_calc_registry.py b/resources/tester/test_472_3_calc_registry.py
index 4812d13dd..b0ef03916 100644
--- a/resources/tester/test_472_3_calc_registry.py
+++ b/resources/tester/test_472_3_calc_registry.py
@@ -97,19 +97,7 @@ GEOMETRY_PULLS = (
     "B05_Profile/B05_Profile_UI_Corridor_Structures_Path.ts",
     "B06_Section/B06_Section_Structure_Layouts.ts",
     "B06_Section/B06_Section_UI_Cross_Body_Guard.ts",
-    "B06_Section/B06_Section_UI_Cross_Box.ts",
-    "B06_Section/B06_Section_UI_Cross_Box_Geom.ts",
-    "B06_Section/B06_Section_UI_Cross_Culvert.ts",
-    "B06_Section/B06_Section_UI_Cross_Culvert_Extra.ts",
-    "B06_Section/B06_Section_UI_Cross_Culvert_Geom.ts",
-    "B06_Section/B06_Section_UI_Cross_Culvert_Tiers.ts",
-    "B06_Section/B06_Section_UI_Cross_Culvert_Types.ts",
-    "B06_Section/B06_Section_UI_Cross_Culvert_Wire.ts",
-    "B06_Section/B06_Section_UI_Cross_Design_Surface.ts",
     "B06_Section/B06_Section_UI_Cross_Excavation.ts",
-    "B06_Section/B06_Section_UI_Cross_Ford.ts",
-    "B06_Section/B06_Section_UI_Cross_Ford_Geom.ts",
-    "B06_Section/B06_Section_UI_Cross_Ford_Pavement.ts",
     "B06_Section/B06_Section_UI_Cross_Revetment.ts",
     "B06_Section/B06_Section_UI_Cross_Wall.ts",
     "B06_Section/B06_Section_UI_Cross_Wall_Hatch.ts",
diff --git a/resources/tester/test_52_3_structure_spec_ford_pavement.py b/resources/tester/test_52_3_structure_spec_ford_pavement.py
index cb71637b7..3508d61f6 100644
--- a/resources/tester/test_52_3_structure_spec_ford_pavement.py
+++ b/resources/tester/test_52_3_structure_spec_ford_pavement.py
@@ -162,6 +162,7 @@ class Node {
 }
 globalThis.document = { createElementNS: (_ns, tag) => new Node(tag) };
 const pave = load(path.join(ROOT, "B06_Section/B06_Section_UI_Cross_Ford_Pavement.ts"));
+const paveGeo = load(path.join(ROOT, "B06_Section/logic/B06_Section_Cross_Ford_Pavement.ts"));
 // +offset = 좌측 · 좌 성토 1:1.5 · 우 절토 오름 — 유입 = 표고 높은 쪽(설계선 끝 · 286-2) = 우 → 유출 = 좌
 // `rightEnd` = 우 끝 표고 — 좌 끝(97)과 같으면 단면유형으로 가름(left_cut = 유입 좌 → 유출 우)
 const design = (mode, rightEnd = 99) => ({
@@ -181,7 +182,7 @@ const run = (mode, withChute = true) => {
   return band ? band.attrs.points : null;
 };
 process.stdout.write(JSON.stringify({
-  outLeft: pave.outletFillLine(design("left_cut", 97)), outRight: pave.outletFillLine(design("left_cut")),
+  outLeft: paveGeo.outletFillLine(design("left_cut", 97)), outRight: paveGeo.outletFillLine(design("left_cut")),
   band: run("left_cut"), none: run("left_cut", false),
 }));
 """
diff --git a/resources/tester/test_91_ground_free.py b/resources/tester/test_91_ground_free.py
index 70f2fda8a..b2f5fb776 100644
--- a/resources/tester/test_91_ground_free.py
+++ b/resources/tester/test_91_ground_free.py
@@ -78,9 +78,9 @@ def test_지형에_막힘_잔재_없음() -> None:
     for name in (
         "B06_Section_UI_Cross_Culvert.ts",
         "B06_Section_UI_Cross_Revetment.ts",
-        "B06_Section_UI_Cross_Culvert_Wire.ts",
+        "logic/B06_Section_Cross_Culvert_Wire.ts",
         "B06_Section_UI_Cross_Culvert_Types.ts",
-        "B06_Section_UI_Cross_Culvert_Extra.ts",
+        "logic/B06_Section_Cross_Culvert_Extra.ts",
     ):
         source = (ROOT / "B06_Section" / name).read_text(encoding="utf-8")
         assert "shiftBlockedM" not in source and "지형에 막힘" not in source, name
diff --git a/resources/tester/test_b06_extra_shift_floor.py b/resources/tester/test_b06_extra_shift_floor.py
index f93126548..2812078db 100644
--- a/resources/tester/test_b06_extra_shift_floor.py
+++ b/resources/tester/test_b06_extra_shift_floor.py
@@ -22,7 +22,7 @@ if str(PROJECT_ROOT) not in sys.path:
     sys.path.insert(0, str(PROJECT_ROOT))
 
 TSC = PROJECT_ROOT / "config" / "node_modules" / "typescript" / "bin" / "tsc"
-MODULE = PROJECT_ROOT / "B06_Section" / "B06_Section_UI_Cross_Culvert_Extra.ts"
+MODULE = PROJECT_ROOT / "B06_Section" / "logic/B06_Section_Cross_Culvert_Extra.ts"
 
 # 상하 내림 2.0m → 하한 2.4m. 좌우 0.5m 를 요청해도 2.4m 로 밀려 나가야 한다.
 REQUESTED_X = 0.5
@@ -79,7 +79,7 @@ def _run(tmp_path: Path, requested_x: float = REQUESTED_X) -> dict:
         check=False,
         capture_output=True,
     )
-    compiled = next(out.rglob("B06_Section_UI_Cross_Culvert_Extra.js"), None)
+    compiled = next(out.rglob("B06_Section_Cross_Culvert_Extra.js"), None)
     assert compiled is not None, "화면 코드가 JS 로 안 나옴 — tsc 실패"
     (out / "runner.cjs").write_text(
         _RUNNER % {"x": requested_x, "d": REQUESTED_D}, encoding="utf-8"
diff --git a/resources/tester/test_b06_ground_unlock.py b/resources/tester/test_b06_ground_unlock.py
index f2dc4f33a..8ce6b1a35 100644
--- a/resources/tester/test_b06_ground_unlock.py
+++ b/resources/tester/test_b06_ground_unlock.py
@@ -18,8 +18,8 @@ BUNDLE = PROJECT_ROOT / "config" / "design_calc_node" / "design_calc_node.js"
 
 _RUNNER = """
 import { writeFileSync } from "node:fs";
-import { placePipeWall } from "./logic/B06_Section_UI_Cross_Culvert_Solve.js";
-import { buildOutletExtras } from "./B06_Section_UI_Cross_Culvert_Extra.js";
+import { placePipeWall } from "./B06_Section_UI_Cross_Culvert_Solve.js";
+import { buildOutletExtras } from "./B06_Section_Cross_Culvert_Extra.js";
 const pipe = (d, x) => placePipeWall({
   autoOffset: 10, outward: 1, height: 2, baseElevation0: 98, edgeElevation: 100,
   invertCap: Number.POSITIVE_INFINITY, adjust: { x, d, h: null, m: null }, defaultD: 4.8,
@@ -42,7 +42,10 @@ writeFileSync(process.argv[2], JSON.stringify({
 @pytest.mark.skipif(not TSC.is_file(), reason="프론트엔드 의존성 미설치")
 def test_원지반이_자리_다단을_막지_않고_노면_위만_막음(tmp_path: Path) -> None:
     out = tmp_path / "js"
-    for name in ("logic/B06_Section_UI_Cross_Culvert_Solve", "B06_Section_UI_Cross_Culvert_Extra"):
+    for name in (
+        "logic/B06_Section_UI_Cross_Culvert_Solve",
+        "logic/B06_Section_Cross_Culvert_Extra",
+    ):
         subprocess.run(  # noqa: S603 — 고정 실행 파일
             [
                 "node",
@@ -67,7 +70,7 @@ def test_원지반이_자리_다단을_막지_않고_노면_위만_막음(tmp_pa
             re.sub(r'(from\s+"\.{1,2}/[^"]+)"', r'\1.js"', emitted.read_text(encoding="utf-8")),
             encoding="utf-8",
         )
-    base = next(path.parent for path in out.rglob("B06_Section_UI_Cross_Culvert_Extra.js"))
+    base = next(path.parent for path in out.rglob("B06_Section_Cross_Culvert_Extra.js"))
     (base / "runner.mjs").write_text(_RUNNER, encoding="utf-8")
     result = tmp_path / "out.json"
     subprocess.run(  # noqa: S603
@@ -87,7 +90,7 @@ def test_원지반이_자리_다단을_막지_않고_노면_위만_막음(tmp_pa
 def test_화면_서버_같은_판() -> None:
     for name in (
         "logic/B06_Section_UI_Cross_Culvert_Solve",
-        "B06_Section_UI_Cross_Culvert_Geom",
+        "logic/B06_Section_Cross_Culvert_Geom",
         "B06_Section_UI_Cross_Revetment",
     ):
         source = (B06 / f"{name}.ts").read_text(encoding="utf-8")
@@ -96,7 +99,7 @@ def test_화면_서버_같은_판() -> None:
     assert "const placeable" not in (B06 / "B06_Section_UI_Cross_Revetment.ts").read_text(
         encoding="utf-8"
     ), "사면안정 흙막이 · 옹벽 매몰 자리 금지가 남음"
-    assert "const placeable" not in (B06 / "B06_Section_UI_Cross_Culvert_Extra.ts").read_text(
+    assert "const placeable" not in (B06 / "logic/B06_Section_Cross_Culvert_Extra.ts").read_text(
         encoding="utf-8"
     ), "추가 흙막이 매몰 자리 금지가 남음"
     bundle = BUNDLE.read_text(encoding="utf-8")
diff --git a/resources/tester/test_b06_height_unlock.py b/resources/tester/test_b06_height_unlock.py
index fe5941507..a389cb963 100644
--- a/resources/tester/test_b06_height_unlock.py
+++ b/resources/tester/test_b06_height_unlock.py
@@ -18,8 +18,8 @@ BUNDLE = PROJECT_ROOT / "config" / "design_calc_node" / "design_calc_node.js"
 
 _RUNNER = """
 import { writeFileSync } from "node:fs";
-import { revetWallSpec } from "./logic/B06_Section_UI_Cross_Culvert_Const.js";
-import { buildOutletExtras } from "./B06_Section_UI_Cross_Culvert_Extra.js";
+import { revetWallSpec } from "./B06_Section_UI_Cross_Culvert_Const.js";
+import { buildOutletExtras } from "./B06_Section_Cross_Culvert_Extra.js";
 const spec = { revet_form: "찰쌓기", revet_height_m: 1.5 };
 const pipe = (h) => revetWallSpec(spec, { h, m: null }, false, 0.8).pureHeight;
 const own = (h) => revetWallSpec(spec, { h, m: null }, true, 0).pureHeight;
@@ -41,7 +41,10 @@ writeFileSync(process.argv[2], JSON.stringify({
 @pytest.mark.skipif(not TSC.is_file(), reason="프론트엔드 의존성 미설치")
 def test_높이는_입력_그대로_0이하만_멈춤(tmp_path: Path) -> None:
     out = tmp_path / "js"
-    for name in ("logic/B06_Section_UI_Cross_Culvert_Const", "B06_Section_UI_Cross_Culvert_Extra"):
+    for name in (
+        "logic/B06_Section_UI_Cross_Culvert_Const",
+        "logic/B06_Section_Cross_Culvert_Extra",
+    ):
         subprocess.run(  # noqa: S603 — 고정 실행 파일
             [
                 "node",
@@ -66,7 +69,7 @@ def test_높이는_입력_그대로_0이하만_멈춤(tmp_path: Path) -> None:
             re.sub(r'(from\s+"\.{1,2}/[^"]+)"', r'\1.js"', emitted.read_text(encoding="utf-8")),
             encoding="utf-8",
         )
-    base = next(path.parent for path in out.rglob("B06_Section_UI_Cross_Culvert_Extra.js"))
+    base = next(path.parent for path in out.rglob("B06_Section_Cross_Culvert_Extra.js"))
     (base / "runner.mjs").write_text(_RUNNER, encoding="utf-8")
     result = tmp_path / "out.json"
     subprocess.run(  # noqa: S603
@@ -85,8 +88,8 @@ def test_높이는_입력_그대로_0이하만_멈춤(tmp_path: Path) -> None:
 
 
 def test_높이_토스트_없음_서버_같은_판() -> None:
-    for name in ("UI_Cross_Culvert_Wire", "UI_Page_Pipe_Options"):
-        source = (B06 / f"B06_Section_{name}.ts").read_text(encoding="utf-8")
+    for name in ("logic/B06_Section_Cross_Culvert_Wire", "B06_Section_UI_Page_Pipe_Options"):
+        source = (B06 / f"{name}.ts").read_text(encoding="utf-8")
         assert "B06_Cross_Height_Floor" not in source, f"{name} 에 최소 높이 토스트가 남음"
         assert "높이는 최소" not in source, f"{name} 에 최소 높이 토스트가 남음"
     panel = (B06 / "B06_Section_UI_Cross_Structure_Panel.ts").read_text(encoding="utf-8")
diff --git a/resources/tester/test_b06_wall_lean_table.py b/resources/tester/test_b06_wall_lean_table.py
index 64ebd2036..f0ecda854 100644
--- a/resources/tester/test_b06_wall_lean_table.py
+++ b/resources/tester/test_b06_wall_lean_table.py
@@ -19,9 +19,9 @@ if str(ROOT) not in sys.path:
 DATA_DIR = ROOT / "resources" / "data_masonry"
 
 GEOMETRY = [
-    "B06_Section_UI_Cross_Culvert_Geom.ts",
+    "logic/B06_Section_Cross_Culvert_Geom.ts",
     "B06_Section_UI_Cross_Wall.ts",
-    "B06_Section_UI_Cross_Culvert_Extra.ts",
+    "logic/B06_Section_Cross_Culvert_Extra.ts",
     "logic/B06_Section_UI_Cross_Culvert_Solve.ts",
 ]
 
diff --git a/resources/tester/test_b06_wall_shape_unified.py b/resources/tester/test_b06_wall_shape_unified.py
index e79c94898..31178e785 100644
--- a/resources/tester/test_b06_wall_shape_unified.py
+++ b/resources/tester/test_b06_wall_shape_unified.py
@@ -95,12 +95,16 @@ def test_벽_외곽_한_벌_높이_입력_그대로_노면_멈춤(tmp_path: Path
 
 
 def test_네_벽이_공용_함수로_서고_형태_한도가_없다() -> None:
-    for name in ("Culvert_Geom", "Culvert_Extra", "Revetment"):
-        source = (B06 / f"B06_Section_UI_Cross_{name}.ts").read_text(encoding="utf-8")
+    for name in (
+        "logic/B06_Section_Cross_Culvert_Geom",
+        "logic/B06_Section_Cross_Culvert_Extra",
+        "B06_Section_UI_Cross_Revetment",
+    ):
+        source = (B06 / f"{name}.ts").read_text(encoding="utf-8")
         assert "buildRevetWallGeometry(" in source, f"{name} 가 공용 벽 함수를 안 씀"
     for path in B06.rglob("*.ts"):  # logic/ 까지(348-1)
         source = path.read_text(encoding="utf-8")
         assert "revetHeightLimit" not in source, f"{path.name} 에 형태 높이 한도가 남음"
         assert "materialLimit" not in source, f"{path.name} 에 재질 높이 한도가 남음"
-    extra = (B06 / "B06_Section_UI_Cross_Culvert_Extra.ts").read_text(encoding="utf-8")
+    extra = (B06 / "logic/B06_Section_Cross_Culvert_Extra.ts").read_text(encoding="utf-8")
     assert "fitted" not in extra, "추가 흙막이가 원지반에 맞춰 늘어남"
diff --git a/resources/tester/ui_checks/54-3_배관_횡단그림.js b/resources/tester/ui_checks/54-3_배관_횡단그림.js
index d2218c8c3..d1d72c45e 100644
--- a/resources/tester/ui_checks/54-3_배관_횡단그림.js
+++ b/resources/tester/ui_checks/54-3_배관_횡단그림.js
@@ -151,7 +151,7 @@
         .map((e) => e.name)
         .filter((n) => n.includes(part))
         .pop();
-    const geom = await import(modUrl("/B06_Section/B06_Section_UI_Cross_Culvert_Geom.ts"));
+    const geom = await import(modUrl("/B06_Section/logic/B06_Section_Cross_Culvert_Geom.ts"));
     const key = Object.keys(sessionStorage).find((k) => k.includes("section-detail"));
     const detail = JSON.parse(sessionStorage.getItem(key));
     const forms = geom.REVET_FORMS;