From d3315da9935ba51c6db142f52308c19cb0f1b508 Mon Sep 17 00:00:00 2001
From: umsangdon <umsangdon@gmail.com>
Date: Fri, 23 Oct 2026 19:22:27 +0900
Subject: [PATCH] =?UTF-8?q?refactor(472-3=20B06=20=EB=B2=BD=20=C2=B7=20?=
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- logic 새 파일 다섯 — Cross_Wall_Geom(벽 1매) · Cross_Wall_Hatch_Geom(무늬 띠 · 물빼기 · 도수로 띠 · 원지반선) · Cross_Excavation_Geom(벽 터파기) · Cross_Design_Surface_Geom(암선 · 포장층) · Cross_Revetment_Geom(독립 기슭막이 배치)
- logic 으로 옮김 — Body_Guard → Cross_Body_Guard · Structure_Layouts · Route_Carry_Patch(내용 그대로 · import 경로만)
- inferStationInterval → common_util_station(글자표 없는 자리 · common_util_svg 는 다시 내보냄) — Node 묶음 ui_template_locale 끌림 끊음
- 부르는 쪽 import 줄 · 등록부 ts 경로 · 시험 · 도우미 경로
- test_472_3 GEOMETRY_PULLS 다섯 줄 걷음 · Wall_Hatch · Excavation · Design_Surface 세 줄은 Culvert · Box · Ford 그림 파일(518-2)이 그리기 함수로 부르는 동안 남김

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---
 A00_Common/design/design_shared.ts            |   2 +-
 .../design/design_structure_pipe_calc.ts      |   2 +-
 A00_Common/design/logic/design_calc_node.ts   |   2 +-
 .../design/logic/design_calc_node_carry.ts    |   2 +-
 .../design/logic/design_calc_node_cross.ts    |   2 +-
 .../design/logic/design_calc_node_stages.ts   |   2 +-
 .../logic/design_calc_registry_facility.ts    |   2 +-
 .../B05_Profile_UI_Corridor_Structures.ts     |   6 +-
 ...05_Profile_UI_Corridor_Structures_Chute.ts |   2 +-
 ...B05_Profile_UI_Corridor_Structures_Path.ts |   2 +-
 .../B05_Profile_UI_RouteEdit_Cross_Card.ts    |   2 +-
 B06_Section/B06_Section_Api_Types.ts          |   2 +-
 B06_Section/B06_Section_Cross_Refresh.ts      |   2 +-
 B06_Section/B06_Section_Section_Adjusts.ts    |   2 +-
 B06_Section/B06_Section_Section_Store.ts      |   4 +-
 B06_Section/B06_Section_UI_Cross_Box_Geom.ts  |   2 +-
 B06_Section/B06_Section_UI_Cross_Culvert.ts   |  10 +-
 .../B06_Section_UI_Cross_Culvert_Extra.ts     |   2 +-
 .../B06_Section_UI_Cross_Culvert_Geom.ts      |   6 +-
 .../B06_Section_UI_Cross_Culvert_Wire.ts      |   2 +-
 .../B06_Section_UI_Cross_Design_Surface.ts    |  60 +---
 .../B06_Section_UI_Cross_Excavation.ts        |  40 +--
 B06_Section/B06_Section_UI_Cross_Ford_Geom.ts |   2 +-
 .../B06_Section_UI_Cross_Ford_Pavement.ts     |   3 +-
 B06_Section/B06_Section_UI_Cross_Revetment.ts | 334 +-----------------
 .../B06_Section_UI_Cross_Underdrain.ts        |   3 +-
 B06_Section/B06_Section_UI_Cross_View.ts      |   8 +-
 B06_Section/B06_Section_UI_Cross_Wall.ts      |  86 +----
 .../B06_Section_UI_Cross_Wall_Hatch.ts        | 210 +----------
 .../B06_Section_Cross_Body_Guard.ts}          |  18 +-
 .../B06_Section_Cross_Design_Surface_Geom.ts  |  71 ++++
 .../B06_Section_Cross_Excavation_Geom.ts      |  57 +++
 .../logic/B06_Section_Cross_Revetment_Geom.ts | 334 ++++++++++++++++++
 .../logic/B06_Section_Cross_Wall_Geom.ts      |  89 +++++
 .../B06_Section_Cross_Wall_Hatch_Geom.ts      | 223 ++++++++++++
 .../B06_Section_Route_Carry_Patch.ts          |  28 +-
 .../B06_Section_Structure_Layouts.ts          |  26 +-
 .../B07_DesignDetail_Cross_Overlay.ts         |   4 +-
 common_util/common_util_station.ts            |  16 +
 common_util/common_util_svg.ts                |  18 +-
 resources/tester/helper_107_ford_free.cjs     |   2 +-
 resources/tester/helper_118_pipe_pick.cjs     |   2 +-
 resources/tester/helper_135_3_chute_solid.cjs |   2 +-
 resources/tester/helper_137_design_pick.cjs   |   2 +-
 .../tester/helper_139_4_buried_outlet.cjs     |   2 +-
 resources/tester/helper_152_2_link_height.cjs |   2 +-
 resources/tester/helper_152_3_chute_cut.cjs   |   4 +-
 resources/tester/helper_152_4_chute_pick.cjs  |   2 +-
 .../tester/helper_152_5_pavement_pick.cjs     |   6 +-
 resources/tester/helper_178_3_slope_tiers.cjs |   2 +-
 resources/tester/helper_186_1_outlet_fold.cjs |   2 +-
 resources/tester/helper_190_1_basin_pick.cjs  |   2 +-
 .../helper_280_3_route_undo_facilities.cjs    |   2 +-
 .../tester/helper_286_1_ford_pavement.cjs     |  11 +-
 .../tester/helper_294_3_ford_extend_chute.cjs |   2 +-
 .../tester/helper_315_ford_chute_overflow.cjs |   2 +-
 resources/tester/helper_318_cross_card.cjs    |  17 +-
 resources/tester/helper_322_0_golden.cjs      |   4 +-
 resources/tester/helper_349_0o_redo_same.cjs  |   2 +-
 resources/tester/helper_349_0q_undo_echo.cjs  |   2 +-
 resources/tester/helper_356_4_undo_grade.cjs  |   2 +-
 resources/tester/helper_384_4_adjusts.cjs     |   2 +-
 .../tester/helper_387_4b_pipe_options.cjs     |   2 +-
 .../tester/helper_428_pipe_move_entry.ts      |   2 +-
 resources/tester/helper_445_save_patch.cjs    |   2 +-
 .../tester/helper_472_1_browser_entry.ts      |   2 +-
 resources/tester/helper_472_6_route_entry.ts  |   2 +-
 resources/tester/helper_73_4_body_guard.cjs   |   4 +-
 resources/tester/helper_79_guard_shape.cjs    |   6 +-
 resources/tester/helper_80_ford_pipe.cjs      |   2 +-
 resources/tester/helper_91_ground_free.cjs    |   2 +-
 resources/tester/test_131_b08_material_fix.py |   4 +-
 .../tester/test_178_1_slope_wall_guard.py     |   2 +-
 .../tester/test_346_3_route_save_screen.py    |   2 +-
 resources/tester/test_445_save_patch.py       |   9 +-
 resources/tester/test_472_3_calc_registry.py  |  11 +-
 resources/tester/test_511_a_calc_mirror.py    |   2 +-
 resources/tester/test_511_c_haul_node.py      |   2 +-
 resources/tester/test_b06_pipe_length.py      |   2 +-
 resources/tester/test_b06_wall_drain_pipe.py  |   5 +-
 resources/tester/test_b06_wall_lean_table.py  |   2 +-
 .../tester/test_b06_wall_shape_unified.py     |  11 +-
 82 files changed, 1000 insertions(+), 840 deletions(-)
 rename B06_Section/{B06_Section_UI_Cross_Body_Guard.ts => logic/B06_Section_Cross_Body_Guard.ts} (95%)
 create mode 100644 B06_Section/logic/B06_Section_Cross_Design_Surface_Geom.ts
 create mode 100644 B06_Section/logic/B06_Section_Cross_Excavation_Geom.ts
 create mode 100644 B06_Section/logic/B06_Section_Cross_Revetment_Geom.ts
 create mode 100644 B06_Section/logic/B06_Section_Cross_Wall_Geom.ts
 create mode 100644 B06_Section/logic/B06_Section_Cross_Wall_Hatch_Geom.ts
 rename B06_Section/{ => logic}/B06_Section_Route_Carry_Patch.ts (95%)
 rename B06_Section/{ => logic}/B06_Section_Structure_Layouts.ts (94%)

diff --git a/A00_Common/design/design_shared.ts b/A00_Common/design/design_shared.ts
index fdcdab850..26c29cd71 100644
--- a/A00_Common/design/design_shared.ts
+++ b/A00_Common/design/design_shared.ts
@@ -45,7 +45,7 @@ import { SECTION_STATION_INTERVAL_M } from "../../B05_Profile/logic/B05_Profile_
 import {
   applyStructureAreaRows,
   structureAreaRows,
-} from "../../B06_Section/B06_Section_Structure_Layouts";
+} from "../../B06_Section/logic/B06_Section_Structure_Layouts";
 import { withDraftAdjusts } from "../../B06_Section/B06_Section_Section_Adjusts";
 import {
   holdSectionDetail,
diff --git a/A00_Common/design/design_structure_pipe_calc.ts b/A00_Common/design/design_structure_pipe_calc.ts
index de52b3b7b..261c5e75a 100644
--- a/A00_Common/design/design_structure_pipe_calc.ts
+++ b/A00_Common/design/design_structure_pipe_calc.ts
@@ -10,7 +10,7 @@
  * ========================================================================== */
 
 import type { CrossSection } from "../../B06_Section/B06_Section_Api_Fetch";
-import { computeStoredLayouts } from "../../B06_Section/B06_Section_Structure_Layouts";
+import { computeStoredLayouts } from "../../B06_Section/logic/B06_Section_Structure_Layouts";
 export { DEFAULT_BASIN_SHAPE } from "../../B06_Section/logic/B06_Section_UI_Cross_Culvert_Basin";
 export { pipeLengthText } from "../../B06_Section/logic/B06_Section_UI_Cross_Culvert_Const"; // 「8 m (7.6)」(225-1)
 import { PIPE_MATCH_M } from "./design_selection";
diff --git a/A00_Common/design/logic/design_calc_node.ts b/A00_Common/design/logic/design_calc_node.ts
index 8d8f6ddc4..65da0c520 100644
--- a/A00_Common/design/logic/design_calc_node.ts
+++ b/A00_Common/design/logic/design_calc_node.ts
@@ -51,7 +51,7 @@ import {
   applyStructureAreaRows,
   extraWallRows,
   structureAreaRows,
-} from "../../../B06_Section/B06_Section_Structure_Layouts";
+} from "../../../B06_Section/logic/B06_Section_Structure_Layouts";
 import { carryRunners, type CarryInputs } from "./design_calc_node_carry";
 import { crossRunners, PAGE_IDS, useDefinition, type CrossInputs } from "./design_calc_node_cross";
 import { followRunners, type FollowInputs } from "./design_calc_node_follow";
diff --git a/A00_Common/design/logic/design_calc_node_carry.ts b/A00_Common/design/logic/design_calc_node_carry.ts
index 38fa33c08..ca80e13a9 100644
--- a/A00_Common/design/logic/design_calc_node_carry.ts
+++ b/A00_Common/design/logic/design_calc_node_carry.ts
@@ -18,7 +18,7 @@ import {
 import {
   routeCarryPatches,
   type RouteCarryInput,
-} from "../../../B06_Section/B06_Section_Route_Carry_Patch";
+} from "../../../B06_Section/logic/B06_Section_Route_Carry_Patch";
 
 type Pipe = FollowingPoint & { id?: string | null };
 type Structure = FollowingStructure & { structure_id?: string | null };
diff --git a/A00_Common/design/logic/design_calc_node_cross.ts b/A00_Common/design/logic/design_calc_node_cross.ts
index 34d129ad8..cd3d79481 100644
--- a/A00_Common/design/logic/design_calc_node_cross.ts
+++ b/A00_Common/design/logic/design_calc_node_cross.ts
@@ -28,7 +28,7 @@ import {
   type RefreshInputs,
 } from "../../../B06_Section/logic/B06_Section_Cross_Refresh_Calc";
 import type { SectionDetailResponse } from "../../../B06_Section/B06_Section_Api_Fetch";
-import { structureAreaRows } from "../../../B06_Section/B06_Section_Structure_Layouts";
+import { structureAreaRows } from "../../../B06_Section/logic/B06_Section_Structure_Layouts";
 import { gridAt } from "./design_calc_node_stages";
 
 export interface CrossInputs {
diff --git a/A00_Common/design/logic/design_calc_node_stages.ts b/A00_Common/design/logic/design_calc_node_stages.ts
index bec708668..472bc7562 100644
--- a/A00_Common/design/logic/design_calc_node_stages.ts
+++ b/A00_Common/design/logic/design_calc_node_stages.ts
@@ -47,7 +47,7 @@ import type {
   SectionDetailResponse,
 } from "../../../B06_Section/B06_Section_Api_Fetch";
 import { createCrossStage } from "../../../B06_Section/logic/B06_Section_Cross_Stage";
-import { pipeBook } from "../../../B06_Section/B06_Section_Route_Carry_Patch";
+import { pipeBook } from "../../../B06_Section/logic/B06_Section_Route_Carry_Patch";
 import { plantedBase } from "./design_planted_base";
 import { AFTER_STAGES, BROWSER_STAGES, createDesignPipeline } from "./design_pipeline";
 import { contextCross, placedFollowInputs } from "./design_pipeline_stage_inputs";
diff --git a/A00_Common/design/logic/design_calc_registry_facility.ts b/A00_Common/design/logic/design_calc_registry_facility.ts
index c327f28a2..b84e9f8fb 100644
--- a/A00_Common/design/logic/design_calc_registry_facility.ts
+++ b/A00_Common/design/logic/design_calc_registry_facility.ts
@@ -125,7 +125,7 @@ export const FACILITY_ROWS: readonly CalcEntry[] = [
     outputs: ["관 길이 · 구조물 면적 · 선 다단 벽", "db:cross_sections.design"],
     site: "browser_now",
     stage: null,
-    ts: `${B06}B06_Section_Structure_Layouts.ts#structureAreaRows`,
+    ts: `${B06}logic/B06_Section_Structure_Layouts.ts#structureAreaRows`,
     runner: "node:structure.layouts",
     pair: null,
     mirror: ["test_b06_pipe_length", "test_299_ford_span_pipe"],
diff --git a/B05_Profile/B05_Profile_UI_Corridor_Structures.ts b/B05_Profile/B05_Profile_UI_Corridor_Structures.ts
index fbdeb6050..940d5b943 100644
--- a/B05_Profile/B05_Profile_UI_Corridor_Structures.ts
+++ b/B05_Profile/B05_Profile_UI_Corridor_Structures.ts
@@ -50,10 +50,10 @@ import {
   storedAdjusts,
   type WallPath,
 } from "./B05_Profile_UI_Corridor_Structures_Path";
-import { computeRevetmentLayout } from "../B06_Section/B06_Section_UI_Cross_Revetment";
-import { withoutGuardedFill } from "../B06_Section/B06_Section_UI_Cross_Body_Guard";
+import { computeRevetmentLayout } from "../B06_Section/logic/B06_Section_Cross_Revetment_Geom";
+import { withoutGuardedFill } from "../B06_Section/logic/B06_Section_Cross_Body_Guard";
 import { chuteBands, fordPavementChute } from "./B05_Profile_UI_Corridor_Structures_Chute";
-import { isChuteSegment } from "../B06_Section/B06_Section_UI_Cross_Wall_Hatch";
+import { isChuteSegment } from "../B06_Section/logic/B06_Section_Cross_Wall_Hatch_Geom";
 import { builds, culvertBody, ownsBody } from "./logic/B05_Profile_UI_Corridor_Structures_Pick";
 
 /** 스윕 프레임 하나 — 노선 위 한 지점의 중심 XY·좌향 단위벡터와 종단 표고 오프셋. */
diff --git a/B05_Profile/B05_Profile_UI_Corridor_Structures_Chute.ts b/B05_Profile/B05_Profile_UI_Corridor_Structures_Chute.ts
index cedbba41f..633dfb711 100644
--- a/B05_Profile/B05_Profile_UI_Corridor_Structures_Chute.ts
+++ b/B05_Profile/B05_Profile_UI_Corridor_Structures_Chute.ts
@@ -14,7 +14,7 @@ import {
   chuteBandOutline,
   chuteRun,
   groundLine,
-} from "../B06_Section/B06_Section_UI_Cross_Wall_Hatch";
+} from "../B06_Section/logic/B06_Section_Cross_Wall_Hatch_Geom";
 import { outletFillLine } from "../B06_Section/B06_Section_UI_Cross_Ford_Pavement";
 
 /** 성토 조각 하나 — B06 오버레이가 띠를 그리는 선(절토 조각은 뺀다). */
diff --git a/B05_Profile/B05_Profile_UI_Corridor_Structures_Path.ts b/B05_Profile/B05_Profile_UI_Corridor_Structures_Path.ts
index 1ae8dd7a6..db8d8f6ec 100644
--- a/B05_Profile/B05_Profile_UI_Corridor_Structures_Path.ts
+++ b/B05_Profile/B05_Profile_UI_Corridor_Structures_Path.ts
@@ -13,7 +13,7 @@
 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 { bodyAbsolute } from "../B06_Section/B06_Section_UI_Cross_Body_Guard";
+import { bodyAbsolute } from "../B06_Section/logic/B06_Section_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 {
diff --git a/B05_Profile/B05_Profile_UI_RouteEdit_Cross_Card.ts b/B05_Profile/B05_Profile_UI_RouteEdit_Cross_Card.ts
index f99e4050e..616986b81 100644
--- a/B05_Profile/B05_Profile_UI_RouteEdit_Cross_Card.ts
+++ b/B05_Profile/B05_Profile_UI_RouteEdit_Cross_Card.ts
@@ -23,7 +23,7 @@ import {
   extraWalls,
   inletStructure,
   revetOffset,
-} from "../B06_Section/B06_Section_Structure_Layouts";
+} from "../B06_Section/logic/B06_Section_Structure_Layouts";
 import { DEFAULT_BOX_SIDE_ADJUST } from "../B06_Section/B06_Section_UI_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";
diff --git a/B06_Section/B06_Section_Api_Types.ts b/B06_Section/B06_Section_Api_Types.ts
index dde05d7ba..0059550db 100644
--- a/B06_Section/B06_Section_Api_Types.ts
+++ b/B06_Section/B06_Section_Api_Types.ts
@@ -59,7 +59,7 @@ export type {
 
 /** 물넘이포장 제원 — 정의처는 렌더 모듈이다(사본 금지, 타입 전용 import라 순환 없음). */
 import type { FordPavementSpec } from "./B06_Section_UI_Cross_Ford_Pavement";
-import type { RevetmentSpec } from "./B06_Section_UI_Cross_Revetment";
+import type { RevetmentSpec } from "./logic/B06_Section_Cross_Revetment_Geom";
 import type { PavementEntry } from "@util/common_util_structure_pavement";
 import type { UnderdrainSpec } from "@util/common_util_structure_underdrain";
 export type { FordPavementSpec, RevetmentSpec };
diff --git a/B06_Section/B06_Section_Cross_Refresh.ts b/B06_Section/B06_Section_Cross_Refresh.ts
index bc5b86ae0..610385875 100644
--- a/B06_Section/B06_Section_Cross_Refresh.ts
+++ b/B06_Section/B06_Section_Cross_Refresh.ts
@@ -45,7 +45,7 @@ import type { ProfileAlignment } from "../B05_Profile/logic/B05_Profile_UI_Profi
 import { readAlignment, toDesignProfile } from "../B05_Profile/logic/B05_Profile_UI_Profile_Data";
 import { useStationKeys } from "./B06_Section_Station_Keys";
 import { hasStaleDesigns, staleKey } from "./B06_Section_UI_Section_Common";
-import { applyStructureAreaRows, structureAreaRows } from "./B06_Section_Structure_Layouts";
+import { applyStructureAreaRows, structureAreaRows } from "./logic/B06_Section_Structure_Layouts";
 import { calcOnServerNow } from "../A00_Common/design/design_calc_sites";
 import {
   areasRequest,
diff --git a/B06_Section/B06_Section_Section_Adjusts.ts b/B06_Section/B06_Section_Section_Adjusts.ts
index eed1cfbb7..0efb16142 100644
--- a/B06_Section/B06_Section_Section_Adjusts.ts
+++ b/B06_Section/B06_Section_Section_Adjusts.ts
@@ -24,7 +24,7 @@ import {
   layPipeOptions,
   type Cells,
   type OptionPipe,
-} from "./B06_Section_Route_Carry_Patch";
+} from "./logic/B06_Section_Route_Carry_Patch";
 
 // 얹기 몸통 = `B06_Section_Route_Carry_Patch` 한 벌(서버 노선 바뀐 [저장] 넘김도 · 472-6) — 여기는 세션 겉.
 export { layPipeOptions, type OptionPipe };
diff --git a/B06_Section/B06_Section_Section_Store.ts b/B06_Section/B06_Section_Section_Store.ts
index 548bc6fd1..3f3188268 100644
--- a/B06_Section/B06_Section_Section_Store.ts
+++ b/B06_Section/B06_Section_Section_Store.ts
@@ -26,9 +26,9 @@ import {
   withDraftShapes,
   withDraftStations,
 } from "./B06_Section_Section_Drafts";
-import { applyStructureAreaRows, structureAreaRows } from "./B06_Section_Structure_Layouts";
+import { applyStructureAreaRows, structureAreaRows } from "./logic/B06_Section_Structure_Layouts";
 import { withDraftAdjusts, withPipeOptions } from "./B06_Section_Section_Adjusts";
-import { crossPatchesFromCache } from "./B06_Section_Route_Carry_Patch";
+import { crossPatchesFromCache } from "./logic/B06_Section_Route_Carry_Patch";
 
 // [저장] patch 바탕 = 한 벌(서버 노선 바뀐 [저장] 넘김도 · 472-6 6-B)
 export { crossPatchesFromCache };
diff --git a/B06_Section/B06_Section_UI_Cross_Box_Geom.ts b/B06_Section/B06_Section_UI_Cross_Box_Geom.ts
index ff0268907..e1ae51215 100644
--- a/B06_Section/B06_Section_UI_Cross_Box_Geom.ts
+++ b/B06_Section/B06_Section_UI_Cross_Box_Geom.ts
@@ -16,7 +16,7 @@
  * 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 { groundLine } from "./logic/B06_Section_Cross_Wall_Hatch_Geom";
 import type { BoxSet, CrossSection, SectionSample } from "./B06_Section_Api_Fetch";
 import type {
   BasinLayout,
diff --git a/B06_Section/B06_Section_UI_Cross_Culvert.ts b/B06_Section/B06_Section_UI_Cross_Culvert.ts
index 5a82725cb..4e5fd3b3a 100644
--- a/B06_Section/B06_Section_UI_Cross_Culvert.ts
+++ b/B06_Section/B06_Section_UI_Cross_Culvert.ts
@@ -24,12 +24,10 @@ import type {
 } from "./B06_Section_UI_Cross_Culvert_Geom";
 import { appendPipeInfoText, outlineBox } from "./B06_Section_UI_Cross_Culvert_Types";
 import { pipeLengthText } from "./logic/B06_Section_UI_Cross_Culvert_Const";
-import { appendWallTrench, foundationChoice } from "./B06_Section_UI_Cross_Excavation";
-import {
-  appendChuteBand,
-  appendWallHatch,
-  isChuteSegment,
-} from "./B06_Section_UI_Cross_Wall_Hatch";
+import { appendWallTrench } from "./B06_Section_UI_Cross_Excavation";
+import { foundationChoice } from "./logic/B06_Section_Cross_Excavation_Geom";
+import { appendChuteBand, appendWallHatch } from "./B06_Section_UI_Cross_Wall_Hatch";
+import { isChuteSegment } from "./logic/B06_Section_Cross_Wall_Hatch_Geom";
 
 // 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.
diff --git a/B06_Section/B06_Section_UI_Cross_Culvert_Extra.ts b/B06_Section/B06_Section_UI_Cross_Culvert_Extra.ts
index facb70214..0132d70dc 100644
--- a/B06_Section/B06_Section_UI_Cross_Culvert_Extra.ts
+++ b/B06_Section/B06_Section_UI_Cross_Culvert_Extra.ts
@@ -32,7 +32,7 @@ import type {
 } 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";
+import { buildRevetWallGeometry } from "./logic/B06_Section_Cross_Wall_Geom";
 
 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/B06_Section_UI_Cross_Culvert_Geom.ts
index cab7ffa11..cc050ba0a 100644
--- a/B06_Section/B06_Section_UI_Cross_Culvert_Geom.ts
+++ b/B06_Section/B06_Section_UI_Cross_Culvert_Geom.ts
@@ -6,7 +6,7 @@
  * (designTrim). 유입 = 상단측. 집수정은 `_Basin.ts`, 성토부·다단은 `_Extra.ts`.
  * ========================================================================== */
 
-import { groundLine } from "./B06_Section_UI_Cross_Wall_Hatch";
+import { groundLine } from "./logic/B06_Section_Cross_Wall_Hatch_Geom";
 import type { CrossSection, CulvertSideSpec, SectionSample } from "./B06_Section_Api_Fetch";
 import {
   revetWallSpec,
@@ -22,7 +22,7 @@ import {
 } 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";
+import { buildRevetWallGeometry } from "./logic/B06_Section_Cross_Wall_Geom";
 import {
   bodyGuardAxes,
   bodyGuardBase,
@@ -30,7 +30,7 @@ import {
   bodyGuardHeight,
   fordPipeFit,
   mergeGuardTrim,
-} from "./B06_Section_UI_Cross_Body_Guard";
+} from "./logic/B06_Section_Cross_Body_Guard";
 import { ZERO_ADJUST } from "./B06_Section_UI_Cross_Culvert_Types";
 import type {
   BasinLayout,
diff --git a/B06_Section/B06_Section_UI_Cross_Culvert_Wire.ts b/B06_Section/B06_Section_UI_Cross_Culvert_Wire.ts
index 7e1a8b209..2ce433f85 100644
--- a/B06_Section/B06_Section_UI_Cross_Culvert_Wire.ts
+++ b/B06_Section/B06_Section_UI_Cross_Culvert_Wire.ts
@@ -4,7 +4,7 @@
  * 분리(700줄 제한). 카드가 다시 그려질 때마다 한 번 불린다.
  * ========================================================================== */
 
-import { bodyAbsolute } from "./B06_Section_UI_Cross_Body_Guard";
+import { bodyAbsolute } from "./logic/B06_Section_Cross_Body_Guard";
 import type { CrossSection, SectionSample } from "./B06_Section_Api_Fetch";
 import { computeCulvertLayout } from "./B06_Section_UI_Cross_Culvert";
 import type {
diff --git a/B06_Section/B06_Section_UI_Cross_Design_Surface.ts b/B06_Section/B06_Section_UI_Cross_Design_Surface.ts
index dcc107c99..25b33d3b7 100644
--- a/B06_Section/B06_Section_UI_Cross_Design_Surface.ts
+++ b/B06_Section/B06_Section_UI_Cross_Design_Surface.ts
@@ -1,5 +1,9 @@
 import type { PavementEntry } from "@util/common_util_structure_pavement";
 import type { CrossDesign } from "./B06_Section_Api_Fetch";
+import {
+  pavementLayers,
+  rockBoundarySegments,
+} from "./logic/B06_Section_Cross_Design_Surface_Geom";
 
 const SVG_NS = "http://www.w3.org/2000/svg";
 
@@ -10,28 +14,17 @@ export function appendRockBoundaryOverlay(
   x: (offset: number) => number,
   y: (elevation: number) => number,
 ): void {
-  const segments: string[][] = [];
-  let current: string[] = [];
-  for (const sample of samples) {
-    const elevation = sample.elevation_m;
-    if (sample.valid === false || elevation === null || !Number.isFinite(elevation ?? NaN)) {
-      if (current.length > 1) segments.push(current);
-      current = [];
-      continue;
-    }
-    current.push(`${x(sample.offset_m ?? 0)},${y((elevation as number) + offsetM)}`);
-  }
-  if (current.length > 1) segments.push(current);
-  for (const points of segments) {
+  for (const segment of rockBoundarySegments(samples, offsetM)) {
     const polyline = document.createElementNS(SVG_NS, "polyline");
-    polyline.setAttribute("points", points.join(" "));
+    polyline.setAttribute(
+      "points",
+      segment.map((p) => `${x(p.offset_m)},${y(p.elevation_m)}`).join(" "),
+    );
     polyline.setAttribute("class", "b06-chart__rock-boundary");
     svg.append(polyline);
   }
 }
 
-type Edge = { offset_m: number; elevation_m: number };
-
 /** 포장사양 → 무늬(88) — 콘크리트 빗금 · 아스콘 점 · 쇄석 돌. 그 밖 = 채움만. */
 const PAVE_MARKS: Record<string, { size: number; marks: string }> = {
   콘크리트: { size: 6, marks: '<path d="M0,6 L6,0" class="b06-chart__pave-mark"/>' },
@@ -49,21 +42,6 @@ const PAVE_MARKS: Record<string, { size: number; marks: string }> = {
 /** 무늬 id 는 문서 안에서 유일 — 카드 · 다시 그리기마다 새 번호(물넘이 빗금과 같은 방식). */
 let paveSeq = 0;
 
-/** 확폭 끈 구간 — 규격 폭 끝(좌 = left − 확폭좌 · 우 = right + 확폭우 · 표고는 두 끝 사이 직선). */
-function standardEdges(edges: { left: Edge; right: Edge }, design: CrossDesign) {
-  const { left, right } = edges;
-  const span = right.offset_m - left.offset_m || 1;
-  const at = (offset: number): Edge => ({
-    offset_m: offset,
-    elevation_m:
-      left.elevation_m + ((right.elevation_m - left.elevation_m) * (offset - left.offset_m)) / span,
-  });
-  return {
-    left: at(left.offset_m - (design.widening_left_m ?? 0)),
-    right: at(right.offset_m + (design.widening_right_m ?? 0)),
-  };
-}
-
 type PaveMark = { type_id: string; start_m?: number | null; end_m?: number | null };
 
 /** 포장층 범위 표식(종류 · 시작 · 끝)이 그 노면공인가 — 겹친 노면공 가름. */
@@ -97,8 +75,8 @@ export function pavementAt<T extends PaveMark>(
 }
 
 /**
- * 포장층 — 노면선(= 포장 윗면) 아래로 두께만큼. 노면공 범위(`section.pavement`)면 그 두께 · 무늬 ·
- * 확폭 켬/끔(여러 건은 아래로 차례로 쌓음) · 없으면 카드 포장 켬일 때 표준 두께 채움만.
+ * 포장층 — 층 꼭짓점 = `pavementLayers`(두께 · 확폭 켬/끔 · 차례로 쌓음) · 여기는 무늬 · 범위 표식 ·
+ * 그리기. 없으면 카드 포장 켬일 때 표준 두께 채움만.
  */
 export function appendPavementOverlay(
   svg: SVGElement,
@@ -107,20 +85,8 @@ export function appendPavementOverlay(
   y: (elevation: number) => number,
   pavement?: readonly PavementEntry[] | null,
 ): void {
-  const edges = design.carriageway_edges ?? design.road_edges;
-  if (!edges) return;
-  const layers = pavement?.length ? pavement : design.paved ? [null] : [];
-  let depth = 0;
-  for (const entry of layers) {
-    const thickness = entry?.thickness_m ?? design.pavement_thickness_m ?? 0.2;
-    const { left, right } = entry && !entry.widening_on ? standardEdges(edges, design) : edges;
-    const points = [
-      `${x(left.offset_m)},${y(left.elevation_m - depth)}`,
-      `${x(right.offset_m)},${y(right.elevation_m - depth)}`,
-      `${x(right.offset_m)},${y(right.elevation_m - depth - thickness)}`,
-      `${x(left.offset_m)},${y(left.elevation_m - depth - thickness)}`,
-    ].join(" ");
-    depth += thickness;
+  for (const { entry, corners } of pavementLayers(design, pavement)) {
+    const points = corners.map((p) => `${x(p.offset_m)},${y(p.elevation_m)}`).join(" ");
     const polygon = document.createElementNS(SVG_NS, "polygon");
     polygon.setAttribute("points", points);
     polygon.setAttribute("class", "b06-chart__pavement");
diff --git a/B06_Section/B06_Section_UI_Cross_Excavation.ts b/B06_Section/B06_Section_UI_Cross_Excavation.ts
index a432f412d..66754615f 100644
--- a/B06_Section/B06_Section_UI_Cross_Excavation.ts
+++ b/B06_Section/B06_Section_UI_Cross_Excavation.ts
@@ -4,6 +4,7 @@
  *
  * 왜 있나 — 「터파기가 현재 횡단도에서 표현이 안 된다」가 사용자 지적이었다. 수량을
  * 세기 전에 **도면에 그것이 보여야** 한다.
+ * 자리 · 폭 · 깊이 = `logic/B06_Section_Cross_Excavation_Geom`(472-3).
  *
  * ⚠ 근거의 급이 다르므로 **노티스를 갈라 적는다** — 값은 `common_util_excavation` 한 곳에서
  *   온다(파이썬 짝과 거울 시험으로 묶여 있다). 여기서는 **그리기만** 한다.
@@ -12,26 +13,12 @@
  * ⚠ **비탈을 주지 않는다 — 수직으로 그린다.** 정본 식에 기울기 항이 없다.
  * ========================================================================== */
 
-import {
-  BASIS_WALL,
-  WALL_BLINDING_DEPTH_M,
-  WALL_BLINDING_WIDTH_M,
-  WALL_FOUNDATION_DEPTH_M,
-  WALL_FOUNDATION_WIDTH_M,
-  WALL_TRENCH_CLEARANCE_M,
-} from "@util/common_util_excavation";
+import { BASIS_WALL } from "@util/common_util_excavation";
 import type { WallLayout } from "./B06_Section_UI_Cross_Culvert_Types";
+import { wallTrench } from "./logic/B06_Section_Cross_Excavation_Geom";
 
 const SVG_NS = "http://www.w3.org/2000/svg";
 
-/** 「기초유」인가 — 저장 제원 `foundation` 의 값. 비어 있으면 **그리지 않는다**(근거 없음). */
-export function foundationChoice(value: unknown): "기초유" | "기초버림" | null {
-  const text = typeof value === "string" ? value.trim() : "";
-  if (text === "기초유") return "기초유";
-  if (text === "기초버림") return "기초버림";
-  return null;
-}
-
 function trenchPath(layer: SVGElement, corners: Array<[number, number]>, tooltip: string): void {
   const line = document.createElementNS(SVG_NS, "polyline");
   line.setAttribute("points", corners.map(([px, py]) => `${px},${py}`).join(" "));
@@ -43,7 +30,7 @@ function trenchPath(layer: SVGElement, corners: Array<[number, number]>, tooltip
 }
 
 /**
- * 벽 터파기 — 벽 바닥선 아래로 **수직**. 폭은 바닥 폭 + 여유 0.2, 깊이는 기초 몫.
+ * 벽 터파기 — 벽 바닥선 아래로 **수직**(자리 = `wallTrench`).
  * `foundation` 이 비어 있으면 **그리지 않는다** — 사용자가 고르기 전에는 근거가 없다.
  */
 export function appendWallTrench(
@@ -53,18 +40,9 @@ export function appendWallTrench(
   x: (offset: number) => number,
   toDisplayY: (elevation: number) => number,
 ): { widthM: number; depthM: number } | null {
-  if (foundation === null) return null;
-  const hasFoundation = foundation === "기초유";
-  const depth = hasFoundation ? WALL_FOUNDATION_DEPTH_M : WALL_BLINDING_DEPTH_M;
-  // 폭: 기초 몫은 정본이 정한 값(0.9 / 0.7), 다만 벽 바닥이 그보다 넓으면 그 폭 + 여유.
-  const baseWidth = Math.abs(wall.bottomFront.offset - wall.bottomBack.offset);
-  const minWidth = hasFoundation ? WALL_FOUNDATION_WIDTH_M : WALL_BLINDING_WIDTH_M;
-  const width = Math.max(minWidth, baseWidth + (hasFoundation ? WALL_TRENCH_CLEARANCE_M : 0));
-  const center = (wall.bottomFront.offset + wall.bottomBack.offset) / 2;
-  const top = Math.max(wall.bottomFront.elevation, wall.bottomBack.elevation);
-  const bottom = top - depth;
-  const left = center - width / 2;
-  const right = center + width / 2;
+  const trench = wallTrench(wall, foundation);
+  if (!trench) return null;
+  const { left, right, top, bottom, widthM, depthM } = trench;
   trenchPath(
     layer,
     [
@@ -73,8 +51,8 @@ export function appendWallTrench(
       [x(right), toDisplayY(bottom)],
       [x(right), toDisplayY(top)],
     ],
-    `${foundation} 터파기 폭 ${width.toFixed(2)}m · 깊이 ${depth.toFixed(2)}m (수직)\n` +
+    `${foundation} 터파기 폭 ${widthM.toFixed(2)}m · 깊이 ${depthM.toFixed(2)}m (수직)\n` +
       `품셈에 규정이 없어 실무 관행으로 정한 값 — ${BASIS_WALL}`,
   );
-  return { widthM: width, depthM: depth };
+  return { widthM, depthM };
 }
diff --git a/B06_Section/B06_Section_UI_Cross_Ford_Geom.ts b/B06_Section/B06_Section_UI_Cross_Ford_Geom.ts
index dd456b134..821c74005 100644
--- a/B06_Section/B06_Section_UI_Cross_Ford_Geom.ts
+++ b/B06_Section/B06_Section_UI_Cross_Ford_Geom.ts
@@ -19,7 +19,7 @@
  * 성토측이라도 기슭막이 세트(다단·재질)와는 연계하지 않는다.
  * ========================================================================== */
 
-import { groundLine } from "./B06_Section_UI_Cross_Wall_Hatch";
+import { groundLine } from "./logic/B06_Section_Cross_Wall_Hatch_Geom";
 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 type {
diff --git a/B06_Section/B06_Section_UI_Cross_Ford_Pavement.ts b/B06_Section/B06_Section_UI_Cross_Ford_Pavement.ts
index bd9d00b8d..e8f13ff6e 100644
--- a/B06_Section/B06_Section_UI_Cross_Ford_Pavement.ts
+++ b/B06_Section/B06_Section_UI_Cross_Ford_Pavement.ts
@@ -15,7 +15,8 @@ import type { CrossDesign } from "./B06_Section_Api_Fetch";
 import type { OffsetPoint } from "./B06_Section_UI_Cross_Culvert_Types";
 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";
+import { appendChuteBand } from "./B06_Section_UI_Cross_Wall_Hatch";
+import { chuteRun } from "./logic/B06_Section_Cross_Wall_Hatch_Geom";
 
 /** 백엔드 `section.ford_pavement` 제원(치수 결정은 서버 몫 — 여기서는 좌표만 만든다). */
 export interface FordPavementSpec {
diff --git a/B06_Section/B06_Section_UI_Cross_Revetment.ts b/B06_Section/B06_Section_UI_Cross_Revetment.ts
index 8ac2c4316..f23868c7a 100644
--- a/B06_Section/B06_Section_UI_Cross_Revetment.ts
+++ b/B06_Section/B06_Section_UI_Cross_Revetment.ts
@@ -1,343 +1,21 @@
 /* =============================================================================
  * B06_Section_UI_Cross_Revetment.ts
- * 독립 기슭막이(배관과 무관) — 배관 세트 기슭막이와 **같은 배치·같은 산식·같은 도형**.
- * 배관만 없을 뿐, 벽 자리·이동·한계는 배관 유출 벽과 한 몸으로 푼다(2026-08-28 사용자:
- * "배관용에서 배관만 빼면 대부분 동일해야").
- *
- * · 자리(2026-08-29 사용자 개정): 조작은 **순수 좌우(x)·순수 상하(d)** 0.1m다.
- *   x = 자동 자리에서의 수평 이동, d = 노견에서 잰 수직 하강. 성토선 각도는 유지하고
- *   **노견 확장 구간**이 길이를 흡수한다. 한계는 노견 안쪽 금지·확장 0(각도 유지)·매몰 금지.
- *   배관 기준벽(`placePipeWall`)의 이동은 손대지 않는다.
- * · 실제 적용값(한계 절삭 후)은 `appliedAdjust`로 돌려주고, 화면이 조작 저장소에 되받는다
- *   — 눌러도 안 움직이는데 숫자만 커지는 것 방지(배관과 같은 syncApplied 규칙).
- * · 다단: 배관과 **같은 함수** `buildExtrasAt`. 그리기(폴리곤·이음선·돌·성토부선)는 공용
- *   `_Cross_Wall`. 노견→벽 성토선은 designTrim의 slope로 그린다.
- *
- * 3D 코리도는 `tiers[].polygon`·`span`을 그대로 스윕한다.
+ * 독립 기슭막이 **그리기** — 자리 · 단 · 트림(기하)은 `logic/B06_Section_Cross_Revetment_Geom`(472-3).
+ * 그리기(폴리곤·이음선·돌·성토부선)는 배관과 같은 공용 `_Cross_Wall`.
  * ========================================================================== */
 
 import { tagShape } from "../common_util/common_util_pick_tag";
-import type { CrossSection } from "./B06_Section_Api_Fetch";
 import {
   FILL_SLOPE_RATIO_MIN,
-  PIPE_WALL_DEFAULT_RUN_M,
   REVET_EMBED_DEPTH_M,
-  REVET_FILL_TOP_M,
-  WALL_MIN_PURE_HEIGHT_M,
 } from "./logic/B06_Section_UI_Cross_Culvert_Const";
-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 {
-  ZERO_ADJUST,
-  type CulvertDesignTrim,
-  type OutletFillSegment,
-  type WallAdjust,
-  type WallLayout,
-} from "./B06_Section_UI_Cross_Culvert_Types";
-import { appendWallTrench, foundationChoice } from "./B06_Section_UI_Cross_Excavation";
-import { appendPlanLine, buildRevetWallGeometry, drawRevetWall } from "./B06_Section_UI_Cross_Wall";
+import type { RevetmentLayout } from "./logic/B06_Section_Cross_Revetment_Geom";
+import { foundationChoice } from "./logic/B06_Section_Cross_Excavation_Geom";
+import { appendWallTrench } from "./B06_Section_UI_Cross_Excavation";
+import { appendPlanLine, drawRevetWall } from "./B06_Section_UI_Cross_Wall";
 
 const SVG_NS = "http://www.w3.org/2000/svg";
 
-/** 서버가 얹어 주는 독립 기슭막이 제원(`section.revetment`, 구조물 정본 D군). */
-export interface RevetmentSpec {
-  structure_id: string | null;
-  type_id: string;
-  name: string;
-  start_m: number;
-  end_m: number;
-  anchor_m: number;
-  form?: string | null;
-  height_m?: number | null;
-  /** 사용자가 고른 설치 측 — "좌" | "우". */
-  side?: string | null;
-  /** 기초 축 — "기초유" | "기초버림". **비어 있으면 터파기를 안 그린다**(근거 없음). */
-  foundation?: string | null;
-  /** 단 수(다단). 1이면 단일 벽. */
-  tiers?: number | null;
-  /** 추가 단(2단부터) 형태 · 높이 — 좌측 폼 「추가 단」 상자(178-3). 빈 값 = 본 벽 형태 · 기본 높이. */
-  extras?: ReadonlyArray<{ form: string | null; height_m: number | null }> | null;
-  /** (구 모델) 기준 올림·좌우 이동 — 배관식 전환 뒤 자리는 조정창 4축(x·d)이 정한다. */
-  lift_m?: number | null;
-  shift_m?: number | null;
-  /** 전면 기울기를 B08 과 같은 칸으로 가르는 값 — 성토/절토 · 전면 기울기(2026-09-14 B5). */
-  face_role?: string | null;
-  face_slope_ratio?: number | string | null;
-}
-
-/** 조정창 조작값 중 이 벽이 쓰는 축 — 배관 벽과 같은 형태(x 좌우·d 사면·h 높이). */
-export interface RevetmentAdjust {
-  x?: number;
-  d?: number | null;
-  h?: number | null;
-}
-
-export interface RevetPoint {
-  offset: number;
-  elevation: number;
-}
-
-/** 한 단(段) — 3D 스윕용 폴리곤(배관 벽과 같은 합성 단면). */
-export interface RevetmentTier {
-  polygon: RevetPoint[];
-}
-
-export interface RevetmentLayout {
-  side: "left" | "right";
-  /** 1단 벽 높이(m) — **바닥~상단**. 조정창 높이 표시·조작의 기준값. */
-  heightM: number;
-  /** 이 단면의 누가거리(m) — 부족 안내를 측점 단위로 센다(재렌더 중복 방지). */
-  chainageM: number;
-  /** 벽 구조물 id — 그린 벽 신원표(323-5). */
-  structureId: string | null;
-  /** 종류 이름(옹벽 · 흙막이 · 돌쌓기 …) — 툴팁 글(323-7 · 「독립 기슭막이」로 뜨던 것). */
-  name: string;
-  /** 사용자가 요청한 단 수 — 실제로 선 단 수(`walls.length`)와 다르면 자리가 부족한 것이다. */
-  requestedTiers: number;
-  /** 1단 벽 이음선 상단점(성토 설계선 트림 경계). */
-  top: RevetPoint;
-  /** 벽 목록(1단 + 다단) — 배관 벽과 같은 `WallLayout`, 그리기가 그대로 쓴다. */
-  walls: WallLayout[];
-  /** 기초 축 — 저장 칸과 **같은 글자**(`foundation`). 터파기 그림이 이 값으로 갈린다. */
-  foundation: string | null;
-  /** 벽 사이·벽 아래 성토부선(배관 다단과 같은 체계). */
-  fillSegments: OutletFillSegment[];
-  /** 성토 설계선을 벽 상단에서 끊고 노견→벽 성토선을 대신 그리는 트림. */
-  designTrim: CulvertDesignTrim;
-  /** 한계 절삭 후 **실제 적용된** 1단 조작값 — 화면이 조작 저장소에 되받는다. */
-  appliedAdjust: WallAdjust;
-  /** 3D 스윕용 단 목록 — 벽 폴리곤 그대로. */
-  tiers: RevetmentTier[];
-  /** 기준 측점 전/후 점유 길이(m) — 3D 스윕 범위. */
-  span: { beforeM: number; afterM: number };
-  /** 기준 측점이 아닌 측점(구간 연동) — 주 형상과 색을 갈라 그림(79-6). */
-  linked: boolean;
-}
-
-/** 형태(구조물 옵션) → 재질(높이 한계·라벨). 메 계열은 dry, 찰=wet, 콘크리트=concrete. */
-function materialOfForm(form?: string | null): RevetMaterial {
-  if (!form) return "dry";
-  if (form.includes("찰")) return "wet";
-  if (form.includes("콘크리트")) return "concrete";
-  return "dry"; // 메쌓기·돌망태·통나무·바자 — 메 계열(2.0m 한계)
-}
-
-/** 유효 지반 샘플의 바깥 한계 offset(설치 측). 없으면 null. */
-function sampleLimit(section: CrossSection, outward: number): number | null {
-  const offsets = section.samples
-    .filter((s) => s.valid !== false && typeof s.offset_m === "number")
-    .map((s) => s.offset_m as number);
-  if (!offsets.length) return null;
-  return outward > 0 ? Math.max(...offsets) : Math.min(...offsets);
-}
-
-/**
- * 노면 횡단물매를 **바깥 방향 1m당 표고 변화**로 돌려준다(하향이면 음수).
- * 노면은 측구 쪽으로 내려가는 단일 평면이라(엔진 `road_z`), 노견을 밖으로 연장하면
- * 그 평면을 그대로 타고 가야 각도가 맞는다(2026-08-29 사용자).
- * 1순위는 **실제 그려진 노견 구간**(차도 끝 → 노면 끝)의 기울기 — 부호를 추측하지
- * 않는다. 노견 폭이 0이면 `cross_slope_pct`를 측구 방향 부호로 쓴다.
- */
-function roadSlopePerOutward(
-  design: NonNullable<CrossSection["design"]>,
-  side: "left" | "right",
-  outward: number,
-): number {
-  const edge = design.road_edges?.[side];
-  const inner = design.carriageway_edges?.[side];
-  if (edge && inner) {
-    const run = (edge.offset_m - inner.offset_m) * outward;
-    if (run > 1e-6) return (edge.elevation_m - inner.elevation_m) / run;
-  }
-  const pct = Number(design.cross_slope_pct);
-  if (!Number.isFinite(pct)) return 0;
-  return (pct / 100) * (design.ditch_side === side ? -1 : 1);
-}
-
-/**
- * 독립 기슭막이 단면 — 제원·높이·설계선이 없거나 자리를 못 찾으면 null.
- * 1단 벽 = 배관 유출 벽과 같은 `placePipeWall`+`buildRevetWallGeometry`,
- * 다단 = 배관과 같은 `buildExtrasAt`.
- */
-export function computeRevetmentLayout(
-  section: CrossSection,
-  adjust?: RevetmentAdjust | null,
-): RevetmentLayout | null {
-  const spec = section.revetment;
-  const design = section.design;
-  if (!spec || !design) return null;
-  const rawHeight = adjust?.h ?? spec.height_m;
-  // 빈 칸만 안 그림 — 0 이하는 아래 하한(0.1)에서 멈춤(54-51).
-  if (rawHeight == null || !Number.isFinite(Number(rawHeight))) return null;
-  const requestedHeight = Number(rawHeight);
-
-  // 설치 측이 비어 있으면 **성토가 나는 쪽**에 세운다 — 좌측 「구조물 배치」의 C군 벽
-  // (옹벽·돌쌓기 등)에는 설치 측 칸이 없기 때문이다(2026-09-06). 양측 절토면 벽이 설
-  // 자리가 없으므로 그리지 않는다(면적도 그대로).
-  const fillSide = (): "left" | "right" | null => {
-    if (design.section_mode === "left_cut") return "right";
-    if (design.section_mode === "right_cut") return "left";
-    if (design.section_mode === "both_fill") return "left";
-    return null;
-  };
-  const side = spec.side === "우" ? "right" : spec.side === "좌" ? "left" : fillSide();
-  if (!side) return null;
-  const outward = side === "left" ? 1 : -1;
-  const edge = design.road_edges?.[side];
-  const groundAt = groundInterpolator(section.samples);
-  const limit = sampleLimit(section, outward);
-  if (!edge || !groundAt || limit === null) return null;
-
-  // 높이 기준 = **벽 바닥~상단**(근입 0.5 포함 — 배관·추가 벽과 같은 기준).
-  // 형태별 높이 한계 없음 — 사용자 입력 그대로(하한만 둠).
-  const pureHeight = Math.max(requestedHeight, WALL_MIN_PURE_HEIGHT_M);
-  /** 기준선(근입 위)~상단 — 도형 계산은 종전대로 이 값으로 한다. */
-  const height = pureHeight - REVET_EMBED_DEPTH_M;
-
-  // 전면 기울기 — 관 흙막이와 같은 `outlineLeanOf`(형태 무관 · 형태는 안 무늬만). 단면유형 ·
-  // 설치 측 · 높이 · 사용자 칸은 그대로 탐. 수량(B08)은 자기 칸으로 따로 셈.
-  const lean = outlineLeanOf({
-    height_m: requestedHeight,
-    section_mode: design.section_mode,
-    side: spec.side,
-    face_role: spec.face_role,
-    face_slope_ratio: spec.face_slope_ratio,
-  });
-  const roadSlope = roadSlopePerOutward(design, side, outward);
-  const autoOffset =
-    edge.offset_m + outward * (fillWallBaseWidth(height, lean) / 2 - REVET_FILL_TOP_M);
-  // x 원점 = 성토사면(1:1.2) 경사길이 4m 지점 — 저장된 x 의 절대 자리 그대로(79b).
-  const autoRun = PIPE_WALL_DEFAULT_RUN_M;
-  /**
-   * 조작 축(2026-08-29 사용자): x = **순수 좌우(m)**, d = **노견에서 잰 순수 수직
-   * 하강(m)**. 성토선 각도는 그대로 두고 **노견 확장 구간**이 길이를 흡수한다
-   * (확장량 t는 아래 폴리라인에서 역산 — t ≥ 0이 각도 유지의 한계다).
-   */
-  // 손대지 않은 벽(x · d 빈 칸) = 성토사면 제일 위(노견 · 79-5) · 손으로 넣은 벽은 종전 기본(79b).
-  const untouched = adjust?.d == null && !adjust?.x;
-  const defaultDrop = untouched ? 0 : autoRun / FILL_SLOPE_RATIO_MIN;
-  /** 각도(1:1.2)를 지키려면 그만큼은 밖으로 나가 있어야 하는 최소 수평 자리 — 음수 = 원점보다
-   *  사면 위(노견 쪽)라 제일 위 자리는 x = −autoRun 이다. */
-  const xFloor = (drop: number): number => FILL_SLOPE_RATIO_MIN * drop - autoRun;
-  const requestedX = untouched ? Number.NEGATIVE_INFINITY : (adjust?.x ?? 0);
-  // 원지반은 자리를 막지 않는다 — 묻히든 뜨든 입력 그대로(54-45). 노면 위 금지 = d ≥ 0.
-  const appliedDrop = Math.round(Math.max(adjust?.d ?? defaultDrop, 0) * 10) / 10;
-  // 0.1 눈금 반올림(종전과 같음) · 반올림이 하한 아래로 내리면 하한(제일 위 자리가 노견 안쪽으로 안 감).
-  const floor = xFloor(appliedDrop);
-  const appliedX = Math.max(Math.round(Math.max(requestedX, floor) * 10) / 10, floor);
-
-  const anchorOffset = autoOffset + outward * (autoRun + appliedX);
-  const baseElevation = edge.elevation_m - appliedDrop - height;
-  const floatGapM = Math.max(0, baseElevation - groundAt(anchorOffset));
-
-  const material = materialOfForm(spec.form);
-  const lengthM = Number.isFinite(spec.end_m - spec.start_m) ? spec.end_m - spec.start_m : null;
-  const tier1 = buildRevetWallGeometry({
-    anchor: { offset: anchorOffset, elevation: baseElevation },
-    outward,
-    height,
-    material,
-    role: "outlet",
-    form: spec.form,
-    lengthM,
-    floatGapM,
-    lean,
-    roadElevation: edge.elevation_m,
-  });
-  // 넣은 좌우 이동이 **각도 하한**에 눌려 통째로 무시됐으면 그 하한을 남긴다(2026-09-07).
-  // 실측 — d 2.6m 자리에서 하한이 1.0m 를 넘어 「1.0m 를 넣어도 0.00m 이동」이 났음.
-  if (requestedX > 0.005 && floor > requestedX + 0.005) {
-    tier1.shiftFloorM = Math.round(floor * 100) / 100;
-  }
-
-  // 다단 — 배관과 같은 함수. 1단 벽 전면 하단 꼭짓점을 성토부선 시작점으로.
-  const requestedTiers = Math.max(1, Math.round(Number(spec.tiers) || 1));
-  const extras =
-    requestedTiers > 1
-      ? buildExtrasAt(tier1.bottomFront, {
-          startBottomElevation: tier1.bottomBack.elevation,
-          outward,
-          groundAt,
-          limitOffset: limit,
-          // 단마다 상자 형태 · 높이(178-3) — 자리(x · d)는 다단 자동 규칙 그대로
-          adjusts: Array.from({ length: requestedTiers - 1 }, (_, i) => ({
-            ...ZERO_ADJUST,
-            m: spec.extras?.[i]?.form ?? null,
-            h: spec.extras?.[i]?.height_m ?? null,
-          })),
-          // 단들도 1단과 같은 형태로 선다 — 안 넘기면 형태가 비어 늘 메쌓기로
-          // 그려졌다(2026-08-30 사용자: 형태별 모양이 누락되는 경우).
-          ownerForm: spec.form,
-          equalize: false,
-          leanFor: (form, pureHeightM) =>
-            outlineLeanOf({
-              form,
-              height_m: pureHeightM,
-              section_mode: design.section_mode,
-              side: spec.side,
-            }),
-        })
-      : { walls: [], segments: [], appliedAdjusts: [], addable: false };
-
-  const walls: WallLayout[] = [tier1, ...extras.walls];
-  // 물빼기 파이프 단면 = 표 형상칸.weep(322-1 · 옹벽)
-  if (catalogRow(spec.type_id)?.shapeOpts.weep) for (const wall of walls) wall.retaining = true;
-  const jt = tier1.fillTop;
-  // 노견 → (물매를 탄 노견 연장) → 벽 이음선 상단점. 연장 구간은 노면 물매 그대로 가고,
-  // 꺾임점에서 성토 물매 1:1.2로 벽 상단에 닿는다(2026-08-29 사용자 확정).
-  //   D  = 노견에서 벽 상단까지 바깥 방향 거리, R0 = 노견과 벽 상단의 낙차
-  //   (D − t) = 1.2 × (R0 + roadSlope × t)  →  t = (D − 1.2·R0) / (1 + 1.2·roadSlope)
-  const edgePoint = { offset: edge.offset_m, elevation: edge.elevation_m };
-  const D = (jt.offset - edge.offset_m) * outward;
-  const R0 = edge.elevation_m - jt.elevation;
-  const denominator = 1 + FILL_SLOPE_RATIO_MIN * roadSlope;
-  const breakRun =
-    R0 > 1e-6 && D > 1e-6 && Math.abs(denominator) > 1e-9
-      ? Math.min(D, Math.max(0, (D - FILL_SLOPE_RATIO_MIN * R0) / denominator))
-      : 0;
-  const slope = {
-    points:
-      breakRun > 1e-6
-        ? [
-            edgePoint,
-            {
-              offset: edge.offset_m + outward * breakRun,
-              elevation: edge.elevation_m + roadSlope * breakRun,
-            },
-            jt,
-          ]
-        : [edgePoint, jt],
-  };
-  const designTrim: CulvertDesignTrim =
-    outward > 0
-      ? { minOffset: -Infinity, maxOffset: jt.offset, maxElevation: jt.elevation, maxSlope: slope }
-      : { minOffset: jt.offset, maxOffset: Infinity, minElevation: jt.elevation, minSlope: slope };
-
-  return {
-    side,
-    heightM: pureHeight,
-    chainageM: Number(section.chainage_m) || 0,
-    structureId: spec.structure_id ?? null,
-    name: spec.name || "벽",
-    requestedTiers,
-    top: jt,
-    walls,
-    foundation: typeof spec.foundation === "string" ? spec.foundation.trim() || null : null,
-    fillSegments: extras.segments,
-    designTrim,
-    appliedAdjust: { x: appliedX, d: appliedDrop, h: adjust?.h ?? null, m: null },
-    tiers: walls.map((wall) => ({ polygon: wall.points })),
-    span: {
-      beforeM: Math.max(spec.anchor_m - spec.start_m, 0),
-      afterM: Math.max(spec.end_m - spec.anchor_m, 0),
-    },
-    linked: Math.abs((Number(section.chainage_m) || 0) - spec.anchor_m) > 0.02,
-  };
-}
-
 /** 횡단 카드에 독립 기슭막이(1단+다단)를 그린다 — 배관 벽과 같은 도형. 그렸으면 setter. */
 export function appendRevetmentOverlay(
   svg: SVGElement,
diff --git a/B06_Section/B06_Section_UI_Cross_Underdrain.ts b/B06_Section/B06_Section_UI_Cross_Underdrain.ts
index 4b43d4798..d1e0b6fe9 100644
--- a/B06_Section/B06_Section_UI_Cross_Underdrain.ts
+++ b/B06_Section/B06_Section_UI_Cross_Underdrain.ts
@@ -14,7 +14,8 @@
 
 import type { CrossDesign } from "./B06_Section_Api_Fetch";
 import type { OffsetPoint } from "./B06_Section_UI_Cross_Culvert_Types";
-import { cell, courses, type BandFrame } from "./B06_Section_UI_Cross_Wall_Hatch";
+import { cell, type BandFrame } from "./B06_Section_UI_Cross_Wall_Hatch";
+import { courses } from "./logic/B06_Section_Cross_Wall_Hatch_Geom";
 import type { UnderdrainSpec } from "@util/common_util_structure_underdrain";
 
 const SVG_NS = "http://www.w3.org/2000/svg";
diff --git a/B06_Section/B06_Section_UI_Cross_View.ts b/B06_Section/B06_Section_UI_Cross_View.ts
index 3f1ad8390..293964374 100644
--- a/B06_Section/B06_Section_UI_Cross_View.ts
+++ b/B06_Section/B06_Section_UI_Cross_View.ts
@@ -7,7 +7,7 @@
  * 횡단은 종/횡 공통 Y스케일을 쓰지 않고 카드마다 자체 1:1 ppm으로 스케일한다.
  * ========================================================================== */
 
-import { withoutGuardedFill } from "./B06_Section_UI_Cross_Body_Guard";
+import { withoutGuardedFill } from "./logic/B06_Section_Cross_Body_Guard";
 import { markLinkedFordPavement } from "./B06_Section_UI_Cross_Ford_Linked";
 import type { CrossSection } from "./B06_Section_Api_Fetch";
 import {
@@ -24,8 +24,10 @@ import { attachShapePick, shapePickRoute, splitPipePick } from "./B06_Section_UI
 import { stackPickTargets } from "./B06_Section_UI_Cross_Pick_Order";
 import { appendUnderdrainOverlay } from "./B06_Section_UI_Cross_Underdrain";
 import { raiseWalls } from "./B06_Section_UI_Cross_Wall";
-import { attachChuteBandPick, groundLine } from "./B06_Section_UI_Cross_Wall_Hatch";
-import { appendRevetmentOverlay, computeRevetmentLayout } from "./B06_Section_UI_Cross_Revetment";
+import { attachChuteBandPick } from "./B06_Section_UI_Cross_Wall_Hatch";
+import { groundLine } from "./logic/B06_Section_Cross_Wall_Hatch_Geom";
+import { appendRevetmentOverlay } from "./B06_Section_UI_Cross_Revetment";
+import { computeRevetmentLayout } from "./logic/B06_Section_Cross_Revetment_Geom";
 import {
   appendCrossDesignOverlay,
   appendPavementOverlay,
diff --git a/B06_Section/B06_Section_UI_Cross_Wall.ts b/B06_Section/B06_Section_UI_Cross_Wall.ts
index ae56ba825..6623be2d5 100644
--- a/B06_Section/B06_Section_UI_Cross_Wall.ts
+++ b/B06_Section/B06_Section_UI_Cross_Wall.ts
@@ -1,7 +1,7 @@
 /* =============================================================================
  * B06_Section_UI_Cross_Wall.ts
- * 기슭막이 벽 **공용 기하 + 그리기** — 배관 세트 벽(`_Cross_Culvert_Geom`/`_Culvert`)과
- * 독립 기슭막이(`_Cross_Revetment`)가 같은 산식·같은 도형을 쓰도록 뽑아낸 층이다
+ * 기슭막이 벽 **그리기**(기하 = `logic/B06_Section_Cross_Wall_Geom` · 472-3) — 배관 세트 벽
+ * (`_Cross_Culvert_Geom`/`_Culvert`)과 독립 기슭막이(`_Cross_Revetment`)가 같은 산식·같은 도형을 쓰도록 뽑아낸 층이다
  * (2026-08-28 사용자: "배관용에서 배관만 빼면 대부분 동일해야"). 벽 1매의 합성 단면
  * (하부 사다리꼴 + 상부 평행사변형, 배면 수직·전면 1:0.3)과 그 돌쌓기 표현은 여기 하나뿐.
  *
@@ -9,15 +9,6 @@
  * 형태가 바꾸는 것은 안 무늬(`_Cross_Wall_Hatch`)뿐 — 외곽은 높이·자리·기울기로만 정함.
  * ========================================================================== */
 
-import {
-  materialLabel,
-  REVET_EMBED_DEPTH_M,
-  REVET_LEAN_RATIO,
-  REVET_THICKNESS_M,
-  WALL_FILL_TOP_INSET_M,
-  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 { appendWallHatch } from "./B06_Section_UI_Cross_Wall_Hatch";
 
@@ -39,79 +30,6 @@ function polygon(
   return shape;
 }
 
-/** 벽 1매의 기하 입력 — 자리 기준은 **하단선 중점**(anchor.offset)과 그 자리 기준표고
- *  (anchor.elevation = 관 invert 또는 지반). 벽은 그 위로 `height`만큼 선다. */
-export interface RevetWallGeometryInput {
-  /** 하단선 중점 offset + 기준표고(벽이 이 위로 선다). */
-  anchor: OffsetPoint;
-  /** +1 = 화면 좌측(계류측), −1 = 우측. 전면 1:0.3이 이 부호로 기운다. */
-  outward: number;
-  /** 계산용 높이(기준표고~상단, 근입 0.5 제외). */
-  height: number;
-  material: RevetMaterial;
-  role: "inlet" | "outlet" | "extra";
-  /** 표기용 형태 — 미지정이면 재질 라벨(메/찰/콘크리트). */
-  form?: string | null;
-  lengthM?: number | null;
-  thickness?: number;
-  floatGapM?: number;
-  extraIndex?: number;
-  /** 전면 기울기 1:n 의 n — 표준경사(`leanOf`). 없으면 종전 0.3. */
-  lean?: number;
-  /** 노면(계획고) — 벽 윗면이 이보다 높으면 여기서 멈춤. 높이 한도는 이것 하나. */
-  roadElevation?: number | null;
-}
-
-/**
- * 합성 단면(하부 사다리꼴 + 상부 평행사변형) 꼭짓점을 만든다. 배관 벽(`buildWall`,
- * `_Cross_Culvert_Geom` 335~376행)과 **같은 산식** — 배면 수직, 상단 변 = 사다리꼴
- * 상단(t/2)+띠(t), 전면 1:0.3, 하단선 = 기준표고 −0.5m 수평 기초.
- */
-export function buildRevetWallGeometry(input: RevetWallGeometryInput): WallLayout {
-  const { anchor, outward, material, role } = input;
-  const road = input.roadElevation;
-  const height =
-    road != null && anchor.elevation + input.height > road + 1e-9
-      ? Math.max(road - anchor.elevation, WALL_MIN_PURE_HEIGHT_M - REVET_EMBED_DEPTH_M)
-      : input.height;
-  const thickness = input.thickness ?? REVET_THICKNESS_M;
-  const lean = input.lean ?? REVET_LEAN_RATIO;
-  const baseWidth = thickness * 1.5 + lean * height;
-  const backOffset = anchor.offset - outward * (baseWidth / 2);
-  const topJoint = backOffset + outward * (thickness / 2);
-  const topElevation = anchor.elevation + height;
-  const topBack: OffsetPoint = { offset: backOffset, elevation: topElevation };
-  const topFront = topJoint + outward * thickness;
-  const frontXAt = (elevation: number): number =>
-    topFront + outward * lean * (topElevation - elevation);
-  const bottomElevation = anchor.elevation - REVET_EMBED_DEPTH_M;
-  const bottomBack: OffsetPoint = { offset: backOffset, elevation: bottomElevation };
-  const bottomFront: OffsetPoint = {
-    offset: frontXAt(bottomElevation),
-    elevation: bottomElevation,
-  };
-  return {
-    role,
-    extraIndex: input.extraIndex,
-    form: input.form ?? materialLabel(material),
-    lengthM: input.lengthM ?? null,
-    backOffset,
-    outerOffset: bottomFront.offset,
-    base: anchor.elevation,
-    height,
-    floatGapM: input.floatGapM ?? 0,
-    material,
-    lean,
-    outward,
-    topBack,
-    topJoint: { offset: topJoint, elevation: topElevation },
-    fillTop: { offset: topFront - outward * WALL_FILL_TOP_INSET_M, elevation: topElevation },
-    bottomBack,
-    bottomFront,
-    points: [bottomBack, topBack, { offset: topFront, elevation: topElevation }, bottomFront],
-  };
-}
-
 /**
  * 벽 1매를 SVG로 그린다 — 폴리곤 + 대각 이음선 + 계류측 기운 띠의 돌쌓기 해칭.
  * 배관 오버레이(`_Cross_Culvert` 161~246행)와 **같은 그리기**. 선택·강조 배선은 호출자
diff --git a/B06_Section/B06_Section_UI_Cross_Wall_Hatch.ts b/B06_Section/B06_Section_UI_Cross_Wall_Hatch.ts
index 38ac262c8..e8e857647 100644
--- a/B06_Section/B06_Section_UI_Cross_Wall_Hatch.ts
+++ b/B06_Section/B06_Section_UI_Cross_Wall_Hatch.ts
@@ -14,10 +14,20 @@
  *   · 돌망태       : 2열 격자 칸(철망 상자) — 칸마다 각진 사각형.
  *   · 통나무·목재틀 : 원(통나무 마구리)을 한 줄로 쌓는다.
  *   · 바자         : 세로 말뚝 3줄 + 가로 엮음 눈금.
+ *
+ * 띠 · 물빼기 · 도수로 띠 기하(m 좌표)는 `logic/B06_Section_Cross_Wall_Hatch_Geom`(472-3).
  * ========================================================================== */
 
 import { REVET_THICKNESS_M } from "./logic/B06_Section_UI_Cross_Culvert_Const";
 import type { OffsetPoint, WallLayout } from "./B06_Section_UI_Cross_Culvert_Types";
+import {
+  chuteBandOutline,
+  chuteRun,
+  courses,
+  hatchOfForm,
+  wallDrainRuns,
+  wallHatchBand,
+} from "./logic/B06_Section_Cross_Wall_Hatch_Geom";
 
 const SVG_NS = "http://www.w3.org/2000/svg";
 const HATCH_CLASS = "b06-chart__culvert-stone";
@@ -30,19 +40,6 @@ const HATCH_CLASS = "b06-chart__culvert-stone";
  */
 let clipSeq = 0;
 
-/** 형태 문자열 → 표현 갈래. 판정 순서는 좁은 말(돌망태·바자)부터. */
-export type WallHatch = "dry" | "wet" | "concrete" | "gabion" | "log" | "wattle";
-
-export function hatchOfForm(form: string | null | undefined): WallHatch {
-  if (!form) return "dry";
-  if (form.includes("돌망태")) return "gabion";
-  if (form.includes("통나무") || form.includes("목재")) return "log";
-  if (form.includes("바자")) return "wattle";
-  if (form.includes("콘크리트")) return "concrete";
-  if (form.includes("찰")) return "wet";
-  return "dry";
-}
-
 /** 띠 안의 국소 좌표 → 화면 px. u = 바닥(0)~상단(1), v = 배면(-0.5)~전면(+0.5). */
 export interface BandFrame {
   point: (u: number, v: number) => [number, number];
@@ -86,11 +83,6 @@ export function cell(
   return rect;
 }
 
-/** 켜 수 — 켜 높이가 목표치에 가장 가깝게, 최소 2켜. */
-export function courses(spanM: number, targetM: number): number {
-  return Math.max(2, Math.round(spanM / targetM));
-}
-
 /** 돌 한 줄 — `thicknessM` = 띠 두께(벽 = 흙막이 띠 · 도수로/돌붙임 = 그 두께 · 90-2). */
 export function drawStones(
   group: SVGElement,
@@ -158,70 +150,23 @@ function drawWattle(group: SVGElement, frame: BandFrame): void {
   }
 }
 
-/** 물빼기 파이프 단면(73-2) — 보기용 고정값 · 지식DB 관경 · 간격과 별개. */
-const DRAIN_BAND_M = 1.5;
-const DRAIN_DIAMETER_M = 0.15;
-/** 앞쪽이 낮게 — 벽 두께 1m 당 낙차(보기용). */
-const DRAIN_FALL = 0.1;
+/** 물빼기 파이프 단면(73-2) — 보기용 · 자리는 `wallDrainRuns`. */
 const DRAIN_CLASS = "b06-chart__wall-drain";
 
-/** 직선 a→b 가 볼록 벽 단면 안을 지나는 구간 — clip 이 없는 곳(B07 오프스크린 수확)도 벽 밖으로 안 샘. */
-function insideRun(a: OffsetPoint, b: OffsetPoint, polygon: OffsetPoint[]): OffsetPoint[] | null {
-  const dx = b.offset - a.offset;
-  const dy = b.elevation - a.elevation;
-  const hits: number[] = [];
-  polygon.forEach((p, i) => {
-    const q = polygon[(i + 1) % polygon.length];
-    const ex = q.offset - p.offset;
-    const ey = q.elevation - p.elevation;
-    const denominator = dx * ey - dy * ex;
-    if (Math.abs(denominator) < 1e-12) return;
-    const t = ((p.offset - a.offset) * ey - (p.elevation - a.elevation) * ex) / denominator;
-    const u = ((p.offset - a.offset) * dy - (p.elevation - a.elevation) * dx) / denominator;
-    if (u >= -1e-9 && u <= 1 + 1e-9) hits.push(t);
-  });
-  if (hits.length < 2) return null;
-  const at = (t: number): OffsetPoint => ({
-    offset: a.offset + dx * t,
-    elevation: a.elevation + dy * t,
-  });
-  return [at(Math.min(...hits)), at(Math.max(...hits))];
-}
-
-/**
- * 옹벽 물빼기 — 높이(바닥~상단)를 반올림(높이 / 1.5)개(최소 1) 띠로 고르게 나눠 띠마다
- * 가운데 하나. 배면 → 전면으로 꿰는 두 줄 평행선(앞쪽 조금 낮게) · 벽 두께만큼.
- */
+/** 옹벽 물빼기 — 물빼기마다 두 줄 평행선(벽 안 구간 · `wallDrainRuns`). */
 function drawDrains(
   group: SVGElement,
   wall: WallLayout,
   x: (offset: number) => number,
   y: (elevation: number) => number,
 ): void {
-  const bottom = wall.bottomBack.elevation;
-  const height = wall.topBack.elevation - bottom;
-  const count = Math.max(1, Math.round(height / DRAIN_BAND_M));
-  const back = wall.backOffset;
-  const [, , topFront, bottomFront] = wall.points;
-  for (let i = 0; i < count; i += 1) {
-    const center = bottom + (height * (i + 0.5)) / count;
-    // 그 높이의 전면 — 전면은 기울어 위로 갈수록 배면에 가까움.
-    const front =
-      bottomFront.offset + (topFront.offset - bottomFront.offset) * ((center - bottom) / height);
-    const fall = (DRAIN_FALL * Math.abs(front - back)) / 2;
+  for (const runs of wallDrainRuns(wall)) {
     const pipe = document.createElementNS(SVG_NS, "g");
     pipe.setAttribute("class", DRAIN_CLASS);
     const title = document.createElementNS(SVG_NS, "title");
     title.textContent = "물빼기(보기용)";
     pipe.append(title);
-    for (const side of [-0.5, 0.5]) {
-      const level = center + side * DRAIN_DIAMETER_M;
-      const run = insideRun(
-        { offset: back, elevation: level + fall },
-        { offset: front, elevation: level - fall },
-        wall.points,
-      );
-      if (!run) continue;
+    for (const run of runs) {
       const el = line(
         [x(run[0].offset), y(run[0].elevation)],
         [x(run[1].offset), y(run[1].elevation)],
@@ -244,15 +189,6 @@ export function appendWallHatch(
   toDisplayY: (elevation: number) => number,
   keyId: string,
 ): void {
-  // 하단선이 원지반을 따라 기울어 있으므로 띠 바닥도 하단선 위에서 잡는다.
-  const bottomSpan = wall.bottomFront.offset - wall.bottomBack.offset;
-  const bottomAtOffset = (offset: number): number =>
-    Math.abs(bottomSpan) > 1e-9
-      ? wall.bottomBack.elevation +
-        (wall.bottomFront.elevation - wall.bottomBack.elevation) *
-          ((offset - wall.bottomBack.offset) / bottomSpan)
-      : wall.bottomBack.elevation;
-
   // 벽을 가로지르던 대각 이음선은 **긋지 않는다**(2026-09-12 사용자: 필요 없음).
   // 종전에는 상단 변 중간점에서 바닥까지 형태와 무관하게 늘 그어, 돌쌓기·콘크리트 해칭
   // 위로 선이 하나 더 지나가 도면이 지저분했다.
@@ -271,10 +207,7 @@ export function appendWallHatch(
   group.setAttribute("clip-path", `url(#${clipId})`);
   layer.append(clip, group);
 
-  const centerBase = wall.outerOffset - wall.outward * (REVET_THICKNESS_M / 2);
-  const centerTop = wall.topJoint.offset + wall.outward * (REVET_THICKNESS_M / 2);
-  const embedBase = bottomAtOffset(centerBase);
-  const spanM = Math.max(0.3, wall.topBack.elevation - embedBase);
+  const { centerBase, centerTop, embedBase, spanM } = wallHatchBand(wall);
   const pixelsPerMeter = Math.abs(x(1) - x(0)) || 1;
   const frame: BandFrame = {
     spanM,
@@ -315,119 +248,6 @@ export function appendWallHatch(
   if (wall.retaining) drawDrains(group, wall, x, toDisplayY);
 }
 
-/**
- * 도수로 · 돌붙임 띠 단면(90-2) — 윗면 = 사면선(겹친 점 뺌) · 변마다 아래쪽(사면 안쪽) 단위 법선 ·
- * 둘레 = 윗면 → 두께만큼 오프셋한 아랫면(거꾸로). 횡단 그림과 B05 3D 띠 솔리드가 같은 것을 쓴다.
- */
-export function chuteBandOutline(
-  raw: OffsetPoint[],
-  thickness: number,
-): { top: OffsetPoint[]; normals: OffsetPoint[]; outline: OffsetPoint[] } | null {
-  if (!(thickness > 0)) return null;
-  const top = raw.filter(
-    (p, i) =>
-      i === 0 ||
-      Math.hypot(p.offset - raw[i - 1].offset, p.elevation - raw[i - 1].elevation) > 1e-6,
-  );
-  if (top.length < 2) return null;
-  // 변마다 아래쪽(사면 안쪽) 단위 법선
-  const normals = top.slice(1).map((p, i) => {
-    const dx = p.offset - top[i].offset;
-    const dz = p.elevation - top[i].elevation;
-    const length = Math.hypot(dx, dz);
-    const sign = dx / length > 0 ? -1 : 1;
-    return { offset: (sign * -dz) / length, elevation: (sign * dx) / length };
-  });
-  // 꺾임은 두 오프셋 선의 교점(마이터 · 너무 뾰족하면 두 배까지)
-  const bottom = top.map((p, i) => {
-    const a = normals[Math.max(i - 1, 0)];
-    const b = normals[Math.min(i, normals.length - 1)];
-    const sum = { offset: a.offset + b.offset, elevation: a.elevation + b.elevation };
-    const k = thickness / Math.max(sum.offset * a.offset + sum.elevation * a.elevation, 0.5);
-    return { offset: p.offset + sum.offset * k, elevation: p.elevation + sum.elevation * k };
-  });
-  return { top, normals, outline: [...top, ...bottom.reverse()] };
-}
-
-/** 꺾은선 앞에서부터 `lengthM` 까지(쓴 길이와 함께). */
-function trimPolyline(
-  points: readonly OffsetPoint[],
-  lengthM: number,
-): { points: OffsetPoint[]; used: number } {
-  const out = points.slice(0, 1);
-  let used = 0;
-  for (let i = 1; i < points.length && lengthM - used > 1e-9; i += 1) {
-    const [a, b] = [points[i - 1], points[i]];
-    const step = Math.hypot(b.offset - a.offset, b.elevation - a.elevation);
-    if (step < 1e-9) continue;
-    const t = Math.min((lengthM - used) / step, 1);
-    out.push({
-      offset: a.offset + (b.offset - a.offset) * t,
-      elevation: a.elevation + (b.elevation - a.elevation) * t,
-    });
-    used += step * t;
-  }
-  return { points: out, used };
-}
-
-/** 원지반 샘플 → 꺾은선(유효 점만 · 오프셋 차례). */
-export function groundLine(
-  samples: ReadonlyArray<{
-    offset_m?: number | null;
-    elevation_m?: number | null;
-    valid?: boolean;
-  }>,
-): OffsetPoint[] {
-  return samples
-    .filter((s) => s.valid !== false && s.offset_m != null && s.elevation_m != null)
-    .map((s) => ({ offset: s.offset_m as number, elevation: s.elevation_m as number }))
-    .sort((a, b) => a.offset - b.offset);
-}
-
-/**
- * 도수로 · 돌붙임 선 길이(294-4) — 선들을 차례로 사면 따라 `lengthM` 까지 자름 · 사면보다 길면 마지막 끝에서
- * 원지반(`ground`)을 바깥으로 따라 이어 그 길이까지 · 길이 없으면 그대로(원지반 닿으면 끝). 점 하나뿐인 선
- * (사면 없음 · 끝이 이미 원지반)은 길이가 있으면 원지반 따라 · 없으면 안 그림. 그림 전용(수량 · 내역 무관).
- */
-export function chuteRun<L extends { points: OffsetPoint[] }>(
-  lines: readonly L[],
-  lengthM?: number | null,
-  ground?: readonly OffsetPoint[],
-): L[] {
-  const drawn = (list: L[]) => list.filter((line) => line.points.length > 1);
-  if (!(lengthM && lengthM > 0) || !lines.length) return drawn([...lines]);
-  let left = lengthM;
-  const out: L[] = [];
-  for (const line of lines) {
-    if (left <= 1e-9) break;
-    const cut = trimPolyline(line.points, left);
-    out.push({ ...line, points: cut.points });
-    left -= cut.used;
-  }
-  const last = out[out.length - 1];
-  if (left > 1e-9 && ground?.length && last) {
-    const first = lines[0].points[0];
-    const end = last.points[last.points.length - 1];
-    const outward = Math.sign(end.offset - first.offset) || Math.sign(end.offset) || 1;
-    const along = [
-      end,
-      ...ground
-        .filter((p) => (p.offset - end.offset) * outward > 1e-6)
-        .sort((a, b) => (a.offset - b.offset) * outward),
-    ];
-    out.push({ ...last, points: trimPolyline(along, left).points });
-  }
-  return drawn(out);
-}
-
-/** 띠가 서는 유출 조각(152-3) — 성토 조각 + 내림 · 수평 절토 조각(3도 절토선 · 끝 ≤ 시작).
- *  3도 선이 못 만나 복합경사로 오르는 절토 조각은 뺌. B06 관 · 흙막이 띠와 3D 띠가 같은 거름. */
-export function isChuteSegment(segment: { kind?: string; points: OffsetPoint[] }): boolean {
-  if (segment.kind !== "cut") return true;
-  const { points } = segment;
-  return points.length > 1 && points[points.length - 1].elevation <= points[0].elevation + 1e-6;
-}
-
 /**
  * 도수로 · 돌붙임 띠(90-2) — 유출 성토사면 선(윗면 = 사면선)을 사면 안쪽(아래)으로 두께만큼 오프셋한
  * 띠 · 안에 돌(흙막이 돌과 같은 그리기 · 두께 인자). 선마다 한 띠 · 그림만(면적 · 터파기 무관).
diff --git a/B06_Section/B06_Section_UI_Cross_Body_Guard.ts b/B06_Section/logic/B06_Section_Cross_Body_Guard.ts
similarity index 95%
rename from B06_Section/B06_Section_UI_Cross_Body_Guard.ts
rename to B06_Section/logic/B06_Section_Cross_Body_Guard.ts
index 83e6b671b..72c989b05 100644
--- a/B06_Section/B06_Section_UI_Cross_Body_Guard.ts
+++ b/B06_Section/logic/B06_Section_Cross_Body_Guard.ts
@@ -1,5 +1,5 @@
 /* =============================================================================
- * B06_Section_UI_Cross_Body_Guard.ts
+ * B06_Section_Cross_Body_Guard.ts
  * 세월교 · 박스 유입 · 유출 흙막이(73-4) — 관보호공 흙막이와 **같은 벽 · 같은 자리 규칙**.
  *
  * 세트는 배관 흙막이와 같은 `section.culvert`(관 숨김 · `body`)로 얹혀 그림 · 연동 · 경사 · 3D ·
@@ -10,20 +10,20 @@
  * 본체가 이 측점에 없으면(연동 옆 측점) 배관 규칙 그대로 — 소유 측점 값을 절대값으로 넘겨 받음.
  * ========================================================================== */
 
-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 { FILL_SLOPE_RATIO_MIN } from "./logic/B06_Section_UI_Cross_Culvert_Const";
+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 { FILL_SLOPE_RATIO_MIN } from "./B06_Section_UI_Cross_Culvert_Const";
 import type {
   CulvertDesignTrim,
   CulvertLayout,
   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";
-import { buildRevetWallGeometry } from "./B06_Section_UI_Cross_Wall";
+} 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";
+import { buildRevetWallGeometry } from "./B06_Section_Cross_Wall_Geom";
 
 type Role = "inlet" | "outlet";
 
diff --git a/B06_Section/logic/B06_Section_Cross_Design_Surface_Geom.ts b/B06_Section/logic/B06_Section_Cross_Design_Surface_Geom.ts
new file mode 100644
index 000000000..68d037fac
--- /dev/null
+++ b/B06_Section/logic/B06_Section_Cross_Design_Surface_Geom.ts
@@ -0,0 +1,71 @@
+/* =============================================================================
+ * B06_Section_Cross_Design_Surface_Geom.ts
+ * 암선 · 포장층 **기하**(m 좌표) — 그리기는 `../B06_Section_UI_Cross_Design_Surface`(472-3).
+ * ========================================================================== */
+
+import type { PavementEntry } from "@util/common_util_structure_pavement";
+import type { CrossDesign } from "../B06_Section_Api_Fetch";
+
+export type Edge = { offset_m: number; elevation_m: number };
+
+/** 암선 — 유효 지반 샘플을 `offsetM` 만큼 올린 꺾은선들(빈 · 무효 샘플에서 끊음 · 두 점 이상만). */
+export function rockBoundarySegments(
+  samples: Array<{ offset_m?: number; elevation_m?: number | null; valid: boolean }>,
+  offsetM: number,
+): Edge[][] {
+  const segments: Edge[][] = [];
+  let current: Edge[] = [];
+  for (const sample of samples) {
+    const elevation = sample.elevation_m;
+    if (sample.valid === false || elevation === null || !Number.isFinite(elevation ?? NaN)) {
+      if (current.length > 1) segments.push(current);
+      current = [];
+      continue;
+    }
+    current.push({ offset_m: sample.offset_m ?? 0, elevation_m: (elevation as number) + offsetM });
+  }
+  if (current.length > 1) segments.push(current);
+  return segments;
+}
+
+/** 확폭 끈 구간 — 규격 폭 끝(좌 = left − 확폭좌 · 우 = right + 확폭우 · 표고는 두 끝 사이 직선). */
+function standardEdges(edges: { left: Edge; right: Edge }, design: CrossDesign) {
+  const { left, right } = edges;
+  const span = right.offset_m - left.offset_m || 1;
+  const at = (offset: number): Edge => ({
+    offset_m: offset,
+    elevation_m:
+      left.elevation_m + ((right.elevation_m - left.elevation_m) * (offset - left.offset_m)) / span,
+  });
+  return {
+    left: at(left.offset_m - (design.widening_left_m ?? 0)),
+    right: at(right.offset_m + (design.widening_right_m ?? 0)),
+  };
+}
+
+/**
+ * 포장층 — 노면선(= 포장 윗면) 아래로 두께만큼. 노면공 범위(`section.pavement`)면 그 두께 ·
+ * 확폭 켬/끔(여러 건은 아래로 차례로 쌓음) · 없으면 카드 포장 켬일 때 표준 두께.
+ * 층마다 네 꼭짓점(좌상 · 우상 · 우하 · 좌하).
+ */
+export function pavementLayers(
+  design: CrossDesign,
+  pavement?: readonly PavementEntry[] | null,
+): Array<{ entry: PavementEntry | null; corners: Edge[] }> {
+  const edges = design.carriageway_edges ?? design.road_edges;
+  if (!edges) return [];
+  const layers = pavement?.length ? pavement : design.paved ? [null] : [];
+  let depth = 0;
+  return layers.map((entry) => {
+    const thickness = entry?.thickness_m ?? design.pavement_thickness_m ?? 0.2;
+    const { left, right } = entry && !entry.widening_on ? standardEdges(edges, design) : edges;
+    const corners = [
+      { offset_m: left.offset_m, elevation_m: left.elevation_m - depth },
+      { offset_m: right.offset_m, elevation_m: right.elevation_m - depth },
+      { offset_m: right.offset_m, elevation_m: right.elevation_m - depth - thickness },
+      { offset_m: left.offset_m, elevation_m: left.elevation_m - depth - thickness },
+    ];
+    depth += thickness;
+    return { entry, corners };
+  });
+}
diff --git a/B06_Section/logic/B06_Section_Cross_Excavation_Geom.ts b/B06_Section/logic/B06_Section_Cross_Excavation_Geom.ts
new file mode 100644
index 000000000..da9e29022
--- /dev/null
+++ b/B06_Section/logic/B06_Section_Cross_Excavation_Geom.ts
@@ -0,0 +1,57 @@
+/* =============================================================================
+ * B06_Section_Cross_Excavation_Geom.ts
+ * 벽 터파기 **기하** — 값은 `common_util_excavation` 한 곳(파이썬 짝 · 거울 시험). 그리기는
+ * `../B06_Section_UI_Cross_Excavation`(472-3).
+ * ⚠ **비탈을 주지 않는다 — 수직.** 정본 식에 기울기 항이 없다.
+ * ========================================================================== */
+
+import {
+  WALL_BLINDING_DEPTH_M,
+  WALL_BLINDING_WIDTH_M,
+  WALL_FOUNDATION_DEPTH_M,
+  WALL_FOUNDATION_WIDTH_M,
+  WALL_TRENCH_CLEARANCE_M,
+} from "@util/common_util_excavation";
+import type { WallLayout } from "../B06_Section_UI_Cross_Culvert_Types";
+
+/** 「기초유」인가 — 저장 제원 `foundation` 의 값. 비어 있으면 **그리지 않는다**(근거 없음). */
+export function foundationChoice(value: unknown): "기초유" | "기초버림" | null {
+  const text = typeof value === "string" ? value.trim() : "";
+  if (text === "기초유") return "기초유";
+  if (text === "기초버림") return "기초버림";
+  return null;
+}
+
+/**
+ * 벽 터파기 — 벽 바닥선 아래로 **수직**. 폭은 바닥 폭 + 여유 0.2, 깊이는 기초 몫.
+ * `foundation` 이 비어 있으면 null — 사용자가 고르기 전에는 근거가 없다.
+ */
+export function wallTrench(
+  wall: WallLayout,
+  foundation: "기초유" | "기초버림" | null,
+): {
+  widthM: number;
+  depthM: number;
+  left: number;
+  right: number;
+  top: number;
+  bottom: number;
+} | null {
+  if (foundation === null) return null;
+  const hasFoundation = foundation === "기초유";
+  const depth = hasFoundation ? WALL_FOUNDATION_DEPTH_M : WALL_BLINDING_DEPTH_M;
+  // 폭: 기초 몫은 정본이 정한 값(0.9 / 0.7), 다만 벽 바닥이 그보다 넓으면 그 폭 + 여유.
+  const baseWidth = Math.abs(wall.bottomFront.offset - wall.bottomBack.offset);
+  const minWidth = hasFoundation ? WALL_FOUNDATION_WIDTH_M : WALL_BLINDING_WIDTH_M;
+  const width = Math.max(minWidth, baseWidth + (hasFoundation ? WALL_TRENCH_CLEARANCE_M : 0));
+  const center = (wall.bottomFront.offset + wall.bottomBack.offset) / 2;
+  const top = Math.max(wall.bottomFront.elevation, wall.bottomBack.elevation);
+  return {
+    widthM: width,
+    depthM: depth,
+    left: center - width / 2,
+    right: center + width / 2,
+    top,
+    bottom: top - depth,
+  };
+}
diff --git a/B06_Section/logic/B06_Section_Cross_Revetment_Geom.ts b/B06_Section/logic/B06_Section_Cross_Revetment_Geom.ts
new file mode 100644
index 000000000..daa8a80f2
--- /dev/null
+++ b/B06_Section/logic/B06_Section_Cross_Revetment_Geom.ts
@@ -0,0 +1,334 @@
+/* =============================================================================
+ * B06_Section_Cross_Revetment_Geom.ts
+ * 독립 기슭막이(배관과 무관) **기하** — 배관 세트 기슭막이와 **같은 배치·같은 산식·같은 도형**.
+ * 배관만 없을 뿐, 벽 자리·이동·한계는 배관 유출 벽과 한 몸으로 푼다(2026-08-28 사용자:
+ * "배관용에서 배관만 빼면 대부분 동일해야"). 그리기는 `../B06_Section_UI_Cross_Revetment`(472-3).
+ *
+ * · 자리(2026-08-29 사용자 개정): 조작은 **순수 좌우(x)·순수 상하(d)** 0.1m다.
+ *   x = 자동 자리에서의 수평 이동, d = 노견에서 잰 수직 하강. 성토선 각도는 유지하고
+ *   **노견 확장 구간**이 길이를 흡수한다. 한계는 노견 안쪽 금지·확장 0(각도 유지)·매몰 금지.
+ *   배관 기준벽(`placePipeWall`)의 이동은 손대지 않는다.
+ * · 실제 적용값(한계 절삭 후)은 `appliedAdjust`로 돌려주고, 화면이 조작 저장소에 되받는다
+ *   — 눌러도 안 움직이는데 숫자만 커지는 것 방지(배관과 같은 syncApplied 규칙).
+ * · 다단: 배관과 **같은 함수** `buildExtrasAt`. 노견→벽 성토선은 designTrim의 slope.
+ *
+ * 3D 코리도는 `tiers[].polygon`·`span`을 그대로 스윕한다.
+ * ========================================================================== */
+
+import type { CrossSection } from "../B06_Section_Api_Fetch";
+import {
+  FILL_SLOPE_RATIO_MIN,
+  PIPE_WALL_DEFAULT_RUN_M,
+  REVET_EMBED_DEPTH_M,
+  REVET_FILL_TOP_M,
+  WALL_MIN_PURE_HEIGHT_M,
+} from "./B06_Section_UI_Cross_Culvert_Const";
+import { outlineLeanOf } from "./B06_Section_UI_Cross_Lean";
+import { catalogRow } from "../../common_util/common_util_structure_catalog";
+import type { RevetMaterial } from "./B06_Section_UI_Cross_Culvert_Const";
+import { fillWallBaseWidth, groundInterpolator } from "./B06_Section_UI_Cross_Culvert_Solve";
+import { buildExtrasAt } from "../B06_Section_UI_Cross_Culvert_Extra";
+import {
+  ZERO_ADJUST,
+  type CulvertDesignTrim,
+  type OutletFillSegment,
+  type WallAdjust,
+  type WallLayout,
+} from "../B06_Section_UI_Cross_Culvert_Types";
+import { buildRevetWallGeometry } from "./B06_Section_Cross_Wall_Geom";
+
+/** 서버가 얹어 주는 독립 기슭막이 제원(`section.revetment`, 구조물 정본 D군). */
+export interface RevetmentSpec {
+  structure_id: string | null;
+  type_id: string;
+  name: string;
+  start_m: number;
+  end_m: number;
+  anchor_m: number;
+  form?: string | null;
+  height_m?: number | null;
+  /** 사용자가 고른 설치 측 — "좌" | "우". */
+  side?: string | null;
+  /** 기초 축 — "기초유" | "기초버림". **비어 있으면 터파기를 안 그린다**(근거 없음). */
+  foundation?: string | null;
+  /** 단 수(다단). 1이면 단일 벽. */
+  tiers?: number | null;
+  /** 추가 단(2단부터) 형태 · 높이 — 좌측 폼 「추가 단」 상자(178-3). 빈 값 = 본 벽 형태 · 기본 높이. */
+  extras?: ReadonlyArray<{ form: string | null; height_m: number | null }> | null;
+  /** (구 모델) 기준 올림·좌우 이동 — 배관식 전환 뒤 자리는 조정창 4축(x·d)이 정한다. */
+  lift_m?: number | null;
+  shift_m?: number | null;
+  /** 전면 기울기를 B08 과 같은 칸으로 가르는 값 — 성토/절토 · 전면 기울기(2026-09-14 B5). */
+  face_role?: string | null;
+  face_slope_ratio?: number | string | null;
+}
+
+/** 조정창 조작값 중 이 벽이 쓰는 축 — 배관 벽과 같은 형태(x 좌우·d 사면·h 높이). */
+export interface RevetmentAdjust {
+  x?: number;
+  d?: number | null;
+  h?: number | null;
+}
+
+export interface RevetPoint {
+  offset: number;
+  elevation: number;
+}
+
+/** 한 단(段) — 3D 스윕용 폴리곤(배관 벽과 같은 합성 단면). */
+export interface RevetmentTier {
+  polygon: RevetPoint[];
+}
+
+export interface RevetmentLayout {
+  side: "left" | "right";
+  /** 1단 벽 높이(m) — **바닥~상단**. 조정창 높이 표시·조작의 기준값. */
+  heightM: number;
+  /** 이 단면의 누가거리(m) — 부족 안내를 측점 단위로 센다(재렌더 중복 방지). */
+  chainageM: number;
+  /** 벽 구조물 id — 그린 벽 신원표(323-5). */
+  structureId: string | null;
+  /** 종류 이름(옹벽 · 흙막이 · 돌쌓기 …) — 툴팁 글(323-7 · 「독립 기슭막이」로 뜨던 것). */
+  name: string;
+  /** 사용자가 요청한 단 수 — 실제로 선 단 수(`walls.length`)와 다르면 자리가 부족한 것이다. */
+  requestedTiers: number;
+  /** 1단 벽 이음선 상단점(성토 설계선 트림 경계). */
+  top: RevetPoint;
+  /** 벽 목록(1단 + 다단) — 배관 벽과 같은 `WallLayout`, 그리기가 그대로 쓴다. */
+  walls: WallLayout[];
+  /** 기초 축 — 저장 칸과 **같은 글자**(`foundation`). 터파기 그림이 이 값으로 갈린다. */
+  foundation: string | null;
+  /** 벽 사이·벽 아래 성토부선(배관 다단과 같은 체계). */
+  fillSegments: OutletFillSegment[];
+  /** 성토 설계선을 벽 상단에서 끊고 노견→벽 성토선을 대신 그리는 트림. */
+  designTrim: CulvertDesignTrim;
+  /** 한계 절삭 후 **실제 적용된** 1단 조작값 — 화면이 조작 저장소에 되받는다. */
+  appliedAdjust: WallAdjust;
+  /** 3D 스윕용 단 목록 — 벽 폴리곤 그대로. */
+  tiers: RevetmentTier[];
+  /** 기준 측점 전/후 점유 길이(m) — 3D 스윕 범위. */
+  span: { beforeM: number; afterM: number };
+  /** 기준 측점이 아닌 측점(구간 연동) — 주 형상과 색을 갈라 그림(79-6). */
+  linked: boolean;
+}
+
+/** 형태(구조물 옵션) → 재질(높이 한계·라벨). 메 계열은 dry, 찰=wet, 콘크리트=concrete. */
+function materialOfForm(form?: string | null): RevetMaterial {
+  if (!form) return "dry";
+  if (form.includes("찰")) return "wet";
+  if (form.includes("콘크리트")) return "concrete";
+  return "dry"; // 메쌓기·돌망태·통나무·바자 — 메 계열(2.0m 한계)
+}
+
+/** 유효 지반 샘플의 바깥 한계 offset(설치 측). 없으면 null. */
+function sampleLimit(section: CrossSection, outward: number): number | null {
+  const offsets = section.samples
+    .filter((s) => s.valid !== false && typeof s.offset_m === "number")
+    .map((s) => s.offset_m as number);
+  if (!offsets.length) return null;
+  return outward > 0 ? Math.max(...offsets) : Math.min(...offsets);
+}
+
+/**
+ * 노면 횡단물매를 **바깥 방향 1m당 표고 변화**로 돌려준다(하향이면 음수).
+ * 노면은 측구 쪽으로 내려가는 단일 평면이라(엔진 `road_z`), 노견을 밖으로 연장하면
+ * 그 평면을 그대로 타고 가야 각도가 맞는다(2026-08-29 사용자).
+ * 1순위는 **실제 그려진 노견 구간**(차도 끝 → 노면 끝)의 기울기 — 부호를 추측하지
+ * 않는다. 노견 폭이 0이면 `cross_slope_pct`를 측구 방향 부호로 쓴다.
+ */
+function roadSlopePerOutward(
+  design: NonNullable<CrossSection["design"]>,
+  side: "left" | "right",
+  outward: number,
+): number {
+  const edge = design.road_edges?.[side];
+  const inner = design.carriageway_edges?.[side];
+  if (edge && inner) {
+    const run = (edge.offset_m - inner.offset_m) * outward;
+    if (run > 1e-6) return (edge.elevation_m - inner.elevation_m) / run;
+  }
+  const pct = Number(design.cross_slope_pct);
+  if (!Number.isFinite(pct)) return 0;
+  return (pct / 100) * (design.ditch_side === side ? -1 : 1);
+}
+
+/**
+ * 독립 기슭막이 단면 — 제원·높이·설계선이 없거나 자리를 못 찾으면 null.
+ * 1단 벽 = 배관 유출 벽과 같은 `placePipeWall`+`buildRevetWallGeometry`,
+ * 다단 = 배관과 같은 `buildExtrasAt`.
+ */
+export function computeRevetmentLayout(
+  section: CrossSection,
+  adjust?: RevetmentAdjust | null,
+): RevetmentLayout | null {
+  const spec = section.revetment;
+  const design = section.design;
+  if (!spec || !design) return null;
+  const rawHeight = adjust?.h ?? spec.height_m;
+  // 빈 칸만 안 그림 — 0 이하는 아래 하한(0.1)에서 멈춤(54-51).
+  if (rawHeight == null || !Number.isFinite(Number(rawHeight))) return null;
+  const requestedHeight = Number(rawHeight);
+
+  // 설치 측이 비어 있으면 **성토가 나는 쪽**에 세운다 — 좌측 「구조물 배치」의 C군 벽
+  // (옹벽·돌쌓기 등)에는 설치 측 칸이 없기 때문이다(2026-09-06). 양측 절토면 벽이 설
+  // 자리가 없으므로 그리지 않는다(면적도 그대로).
+  const fillSide = (): "left" | "right" | null => {
+    if (design.section_mode === "left_cut") return "right";
+    if (design.section_mode === "right_cut") return "left";
+    if (design.section_mode === "both_fill") return "left";
+    return null;
+  };
+  const side = spec.side === "우" ? "right" : spec.side === "좌" ? "left" : fillSide();
+  if (!side) return null;
+  const outward = side === "left" ? 1 : -1;
+  const edge = design.road_edges?.[side];
+  const groundAt = groundInterpolator(section.samples);
+  const limit = sampleLimit(section, outward);
+  if (!edge || !groundAt || limit === null) return null;
+
+  // 높이 기준 = **벽 바닥~상단**(근입 0.5 포함 — 배관·추가 벽과 같은 기준).
+  // 형태별 높이 한계 없음 — 사용자 입력 그대로(하한만 둠).
+  const pureHeight = Math.max(requestedHeight, WALL_MIN_PURE_HEIGHT_M);
+  /** 기준선(근입 위)~상단 — 도형 계산은 종전대로 이 값으로 한다. */
+  const height = pureHeight - REVET_EMBED_DEPTH_M;
+
+  // 전면 기울기 — 관 흙막이와 같은 `outlineLeanOf`(형태 무관 · 형태는 안 무늬만). 단면유형 ·
+  // 설치 측 · 높이 · 사용자 칸은 그대로 탐. 수량(B08)은 자기 칸으로 따로 셈.
+  const lean = outlineLeanOf({
+    height_m: requestedHeight,
+    section_mode: design.section_mode,
+    side: spec.side,
+    face_role: spec.face_role,
+    face_slope_ratio: spec.face_slope_ratio,
+  });
+  const roadSlope = roadSlopePerOutward(design, side, outward);
+  const autoOffset =
+    edge.offset_m + outward * (fillWallBaseWidth(height, lean) / 2 - REVET_FILL_TOP_M);
+  // x 원점 = 성토사면(1:1.2) 경사길이 4m 지점 — 저장된 x 의 절대 자리 그대로(79b).
+  const autoRun = PIPE_WALL_DEFAULT_RUN_M;
+  /**
+   * 조작 축(2026-08-29 사용자): x = **순수 좌우(m)**, d = **노견에서 잰 순수 수직
+   * 하강(m)**. 성토선 각도는 그대로 두고 **노견 확장 구간**이 길이를 흡수한다
+   * (확장량 t는 아래 폴리라인에서 역산 — t ≥ 0이 각도 유지의 한계다).
+   */
+  // 손대지 않은 벽(x · d 빈 칸) = 성토사면 제일 위(노견 · 79-5) · 손으로 넣은 벽은 종전 기본(79b).
+  const untouched = adjust?.d == null && !adjust?.x;
+  const defaultDrop = untouched ? 0 : autoRun / FILL_SLOPE_RATIO_MIN;
+  /** 각도(1:1.2)를 지키려면 그만큼은 밖으로 나가 있어야 하는 최소 수평 자리 — 음수 = 원점보다
+   *  사면 위(노견 쪽)라 제일 위 자리는 x = −autoRun 이다. */
+  const xFloor = (drop: number): number => FILL_SLOPE_RATIO_MIN * drop - autoRun;
+  const requestedX = untouched ? Number.NEGATIVE_INFINITY : (adjust?.x ?? 0);
+  // 원지반은 자리를 막지 않는다 — 묻히든 뜨든 입력 그대로(54-45). 노면 위 금지 = d ≥ 0.
+  const appliedDrop = Math.round(Math.max(adjust?.d ?? defaultDrop, 0) * 10) / 10;
+  // 0.1 눈금 반올림(종전과 같음) · 반올림이 하한 아래로 내리면 하한(제일 위 자리가 노견 안쪽으로 안 감).
+  const floor = xFloor(appliedDrop);
+  const appliedX = Math.max(Math.round(Math.max(requestedX, floor) * 10) / 10, floor);
+
+  const anchorOffset = autoOffset + outward * (autoRun + appliedX);
+  const baseElevation = edge.elevation_m - appliedDrop - height;
+  const floatGapM = Math.max(0, baseElevation - groundAt(anchorOffset));
+
+  const material = materialOfForm(spec.form);
+  const lengthM = Number.isFinite(spec.end_m - spec.start_m) ? spec.end_m - spec.start_m : null;
+  const tier1 = buildRevetWallGeometry({
+    anchor: { offset: anchorOffset, elevation: baseElevation },
+    outward,
+    height,
+    material,
+    role: "outlet",
+    form: spec.form,
+    lengthM,
+    floatGapM,
+    lean,
+    roadElevation: edge.elevation_m,
+  });
+  // 넣은 좌우 이동이 **각도 하한**에 눌려 통째로 무시됐으면 그 하한을 남긴다(2026-09-07).
+  // 실측 — d 2.6m 자리에서 하한이 1.0m 를 넘어 「1.0m 를 넣어도 0.00m 이동」이 났음.
+  if (requestedX > 0.005 && floor > requestedX + 0.005) {
+    tier1.shiftFloorM = Math.round(floor * 100) / 100;
+  }
+
+  // 다단 — 배관과 같은 함수. 1단 벽 전면 하단 꼭짓점을 성토부선 시작점으로.
+  const requestedTiers = Math.max(1, Math.round(Number(spec.tiers) || 1));
+  const extras =
+    requestedTiers > 1
+      ? buildExtrasAt(tier1.bottomFront, {
+          startBottomElevation: tier1.bottomBack.elevation,
+          outward,
+          groundAt,
+          limitOffset: limit,
+          // 단마다 상자 형태 · 높이(178-3) — 자리(x · d)는 다단 자동 규칙 그대로
+          adjusts: Array.from({ length: requestedTiers - 1 }, (_, i) => ({
+            ...ZERO_ADJUST,
+            m: spec.extras?.[i]?.form ?? null,
+            h: spec.extras?.[i]?.height_m ?? null,
+          })),
+          // 단들도 1단과 같은 형태로 선다 — 안 넘기면 형태가 비어 늘 메쌓기로
+          // 그려졌다(2026-08-30 사용자: 형태별 모양이 누락되는 경우).
+          ownerForm: spec.form,
+          equalize: false,
+          leanFor: (form, pureHeightM) =>
+            outlineLeanOf({
+              form,
+              height_m: pureHeightM,
+              section_mode: design.section_mode,
+              side: spec.side,
+            }),
+        })
+      : { walls: [], segments: [], appliedAdjusts: [], addable: false };
+
+  const walls: WallLayout[] = [tier1, ...extras.walls];
+  // 물빼기 파이프 단면 = 표 형상칸.weep(322-1 · 옹벽)
+  if (catalogRow(spec.type_id)?.shapeOpts.weep) for (const wall of walls) wall.retaining = true;
+  const jt = tier1.fillTop;
+  // 노견 → (물매를 탄 노견 연장) → 벽 이음선 상단점. 연장 구간은 노면 물매 그대로 가고,
+  // 꺾임점에서 성토 물매 1:1.2로 벽 상단에 닿는다(2026-08-29 사용자 확정).
+  //   D  = 노견에서 벽 상단까지 바깥 방향 거리, R0 = 노견과 벽 상단의 낙차
+  //   (D − t) = 1.2 × (R0 + roadSlope × t)  →  t = (D − 1.2·R0) / (1 + 1.2·roadSlope)
+  const edgePoint = { offset: edge.offset_m, elevation: edge.elevation_m };
+  const D = (jt.offset - edge.offset_m) * outward;
+  const R0 = edge.elevation_m - jt.elevation;
+  const denominator = 1 + FILL_SLOPE_RATIO_MIN * roadSlope;
+  const breakRun =
+    R0 > 1e-6 && D > 1e-6 && Math.abs(denominator) > 1e-9
+      ? Math.min(D, Math.max(0, (D - FILL_SLOPE_RATIO_MIN * R0) / denominator))
+      : 0;
+  const slope = {
+    points:
+      breakRun > 1e-6
+        ? [
+            edgePoint,
+            {
+              offset: edge.offset_m + outward * breakRun,
+              elevation: edge.elevation_m + roadSlope * breakRun,
+            },
+            jt,
+          ]
+        : [edgePoint, jt],
+  };
+  const designTrim: CulvertDesignTrim =
+    outward > 0
+      ? { minOffset: -Infinity, maxOffset: jt.offset, maxElevation: jt.elevation, maxSlope: slope }
+      : { minOffset: jt.offset, maxOffset: Infinity, minElevation: jt.elevation, minSlope: slope };
+
+  return {
+    side,
+    heightM: pureHeight,
+    chainageM: Number(section.chainage_m) || 0,
+    structureId: spec.structure_id ?? null,
+    name: spec.name || "벽",
+    requestedTiers,
+    top: jt,
+    walls,
+    foundation: typeof spec.foundation === "string" ? spec.foundation.trim() || null : null,
+    fillSegments: extras.segments,
+    designTrim,
+    appliedAdjust: { x: appliedX, d: appliedDrop, h: adjust?.h ?? null, m: null },
+    tiers: walls.map((wall) => ({ polygon: wall.points })),
+    span: {
+      beforeM: Math.max(spec.anchor_m - spec.start_m, 0),
+      afterM: Math.max(spec.end_m - spec.anchor_m, 0),
+    },
+    linked: Math.abs((Number(section.chainage_m) || 0) - spec.anchor_m) > 0.02,
+  };
+}
diff --git a/B06_Section/logic/B06_Section_Cross_Wall_Geom.ts b/B06_Section/logic/B06_Section_Cross_Wall_Geom.ts
new file mode 100644
index 000000000..cf543dab1
--- /dev/null
+++ b/B06_Section/logic/B06_Section_Cross_Wall_Geom.ts
@@ -0,0 +1,89 @@
+/* =============================================================================
+ * B06_Section_Cross_Wall_Geom.ts
+ * 기슭막이 벽 1매 **기하** — 배관 세트 벽(`_Cross_Culvert_Geom`/`_Culvert`)과 독립 기슭막이
+ * (`_Cross_Revetment`)가 같은 산식을 쓴다. 그리기는 `../B06_Section_UI_Cross_Wall`(472-3).
+ * ========================================================================== */
+
+import {
+  materialLabel,
+  REVET_EMBED_DEPTH_M,
+  REVET_LEAN_RATIO,
+  REVET_THICKNESS_M,
+  WALL_FILL_TOP_INSET_M,
+  WALL_MIN_PURE_HEIGHT_M,
+} from "./B06_Section_UI_Cross_Culvert_Const";
+import type { RevetMaterial } from "./B06_Section_UI_Cross_Culvert_Const";
+import type { OffsetPoint, WallLayout } from "../B06_Section_UI_Cross_Culvert_Types";
+
+/** 벽 1매의 기하 입력 — 자리 기준은 **하단선 중점**(anchor.offset)과 그 자리 기준표고
+ *  (anchor.elevation = 관 invert 또는 지반). 벽은 그 위로 `height`만큼 선다. */
+export interface RevetWallGeometryInput {
+  /** 하단선 중점 offset + 기준표고(벽이 이 위로 선다). */
+  anchor: OffsetPoint;
+  /** +1 = 화면 좌측(계류측), −1 = 우측. 전면 1:0.3이 이 부호로 기운다. */
+  outward: number;
+  /** 계산용 높이(기준표고~상단, 근입 0.5 제외). */
+  height: number;
+  material: RevetMaterial;
+  role: "inlet" | "outlet" | "extra";
+  /** 표기용 형태 — 미지정이면 재질 라벨(메/찰/콘크리트). */
+  form?: string | null;
+  lengthM?: number | null;
+  thickness?: number;
+  floatGapM?: number;
+  extraIndex?: number;
+  /** 전면 기울기 1:n 의 n — 표준경사(`leanOf`). 없으면 종전 0.3. */
+  lean?: number;
+  /** 노면(계획고) — 벽 윗면이 이보다 높으면 여기서 멈춤. 높이 한도는 이것 하나. */
+  roadElevation?: number | null;
+}
+
+/**
+ * 합성 단면(하부 사다리꼴 + 상부 평행사변형) 꼭짓점을 만든다. 배관 벽(`buildWall`,
+ * `_Cross_Culvert_Geom` 335~376행)과 **같은 산식** — 배면 수직, 상단 변 = 사다리꼴
+ * 상단(t/2)+띠(t), 전면 1:0.3, 하단선 = 기준표고 −0.5m 수평 기초.
+ */
+export function buildRevetWallGeometry(input: RevetWallGeometryInput): WallLayout {
+  const { anchor, outward, material, role } = input;
+  const road = input.roadElevation;
+  const height =
+    road != null && anchor.elevation + input.height > road + 1e-9
+      ? Math.max(road - anchor.elevation, WALL_MIN_PURE_HEIGHT_M - REVET_EMBED_DEPTH_M)
+      : input.height;
+  const thickness = input.thickness ?? REVET_THICKNESS_M;
+  const lean = input.lean ?? REVET_LEAN_RATIO;
+  const baseWidth = thickness * 1.5 + lean * height;
+  const backOffset = anchor.offset - outward * (baseWidth / 2);
+  const topJoint = backOffset + outward * (thickness / 2);
+  const topElevation = anchor.elevation + height;
+  const topBack: OffsetPoint = { offset: backOffset, elevation: topElevation };
+  const topFront = topJoint + outward * thickness;
+  const frontXAt = (elevation: number): number =>
+    topFront + outward * lean * (topElevation - elevation);
+  const bottomElevation = anchor.elevation - REVET_EMBED_DEPTH_M;
+  const bottomBack: OffsetPoint = { offset: backOffset, elevation: bottomElevation };
+  const bottomFront: OffsetPoint = {
+    offset: frontXAt(bottomElevation),
+    elevation: bottomElevation,
+  };
+  return {
+    role,
+    extraIndex: input.extraIndex,
+    form: input.form ?? materialLabel(material),
+    lengthM: input.lengthM ?? null,
+    backOffset,
+    outerOffset: bottomFront.offset,
+    base: anchor.elevation,
+    height,
+    floatGapM: input.floatGapM ?? 0,
+    material,
+    lean,
+    outward,
+    topBack,
+    topJoint: { offset: topJoint, elevation: topElevation },
+    fillTop: { offset: topFront - outward * WALL_FILL_TOP_INSET_M, elevation: topElevation },
+    bottomBack,
+    bottomFront,
+    points: [bottomBack, topBack, { offset: topFront, elevation: topElevation }, bottomFront],
+  };
+}
diff --git a/B06_Section/logic/B06_Section_Cross_Wall_Hatch_Geom.ts b/B06_Section/logic/B06_Section_Cross_Wall_Hatch_Geom.ts
new file mode 100644
index 000000000..aa984a7f6
--- /dev/null
+++ b/B06_Section/logic/B06_Section_Cross_Wall_Hatch_Geom.ts
@@ -0,0 +1,223 @@
+/* =============================================================================
+ * B06_Section_Cross_Wall_Hatch_Geom.ts
+ * 벽 안 무늬 · 물빼기 · 도수로 · 돌붙임 띠 **기하**(m 좌표) — 그리기는
+ * `../B06_Section_UI_Cross_Wall_Hatch`(472-3). 횡단 그림과 B05 3D 띠 솔리드가 같은 것을 쓴다.
+ * ========================================================================== */
+
+import { REVET_THICKNESS_M } from "./B06_Section_UI_Cross_Culvert_Const";
+import type { OffsetPoint, WallLayout } from "../B06_Section_UI_Cross_Culvert_Types";
+
+/** 형태 문자열 → 표현 갈래. 판정 순서는 좁은 말(돌망태·바자)부터. */
+export type WallHatch = "dry" | "wet" | "concrete" | "gabion" | "log" | "wattle";
+
+export function hatchOfForm(form: string | null | undefined): WallHatch {
+  if (!form) return "dry";
+  if (form.includes("돌망태")) return "gabion";
+  if (form.includes("통나무") || form.includes("목재")) return "log";
+  if (form.includes("바자")) return "wattle";
+  if (form.includes("콘크리트")) return "concrete";
+  if (form.includes("찰")) return "wet";
+  return "dry";
+}
+
+/** 켜 수 — 켜 높이가 목표치에 가장 가깝게, 최소 2켜. */
+export function courses(spanM: number, targetM: number): number {
+  return Math.max(2, Math.round(spanM / targetM));
+}
+
+/** 벽 전면 기운 띠(이음선~전면, 두께 REVET_THICKNESS_M)의 중심축 — 바닥 · 상단 offset · 바닥 표고 · 길이. */
+export function wallHatchBand(wall: WallLayout): {
+  centerBase: number;
+  centerTop: number;
+  embedBase: number;
+  spanM: number;
+} {
+  // 하단선이 원지반을 따라 기울어 있으므로 띠 바닥도 하단선 위에서 잡는다.
+  const bottomSpan = wall.bottomFront.offset - wall.bottomBack.offset;
+  const bottomAtOffset = (offset: number): number =>
+    Math.abs(bottomSpan) > 1e-9
+      ? wall.bottomBack.elevation +
+        (wall.bottomFront.elevation - wall.bottomBack.elevation) *
+          ((offset - wall.bottomBack.offset) / bottomSpan)
+      : wall.bottomBack.elevation;
+  const centerBase = wall.outerOffset - wall.outward * (REVET_THICKNESS_M / 2);
+  const centerTop = wall.topJoint.offset + wall.outward * (REVET_THICKNESS_M / 2);
+  const embedBase = bottomAtOffset(centerBase);
+  const spanM = Math.max(0.3, wall.topBack.elevation - embedBase);
+  return { centerBase, centerTop, embedBase, spanM };
+}
+
+/** 물빼기 파이프 단면(73-2) — 보기용 고정값 · 지식DB 관경 · 간격과 별개. */
+const DRAIN_BAND_M = 1.5;
+const DRAIN_DIAMETER_M = 0.15;
+/** 앞쪽이 낮게 — 벽 두께 1m 당 낙차(보기용). */
+const DRAIN_FALL = 0.1;
+
+/** 직선 a→b 가 볼록 벽 단면 안을 지나는 구간 — clip 이 없는 곳(B07 오프스크린 수확)도 벽 밖으로 안 샘. */
+function insideRun(a: OffsetPoint, b: OffsetPoint, polygon: OffsetPoint[]): OffsetPoint[] | null {
+  const dx = b.offset - a.offset;
+  const dy = b.elevation - a.elevation;
+  const hits: number[] = [];
+  polygon.forEach((p, i) => {
+    const q = polygon[(i + 1) % polygon.length];
+    const ex = q.offset - p.offset;
+    const ey = q.elevation - p.elevation;
+    const denominator = dx * ey - dy * ex;
+    if (Math.abs(denominator) < 1e-12) return;
+    const t = ((p.offset - a.offset) * ey - (p.elevation - a.elevation) * ex) / denominator;
+    const u = ((p.offset - a.offset) * dy - (p.elevation - a.elevation) * dx) / denominator;
+    if (u >= -1e-9 && u <= 1 + 1e-9) hits.push(t);
+  });
+  if (hits.length < 2) return null;
+  const at = (t: number): OffsetPoint => ({
+    offset: a.offset + dx * t,
+    elevation: a.elevation + dy * t,
+  });
+  return [at(Math.min(...hits)), at(Math.max(...hits))];
+}
+
+/**
+ * 옹벽 물빼기 — 높이(바닥~상단)를 반올림(높이 / 1.5)개(최소 1) 띠로 고르게 나눠 띠마다
+ * 가운데 하나. 배면 → 전면으로 꿰는 두 줄 평행선(앞쪽 조금 낮게) · 벽 두께만큼.
+ * 물빼기마다 벽 안 구간 목록(0~2 줄).
+ */
+export function wallDrainRuns(wall: WallLayout): OffsetPoint[][][] {
+  const bottom = wall.bottomBack.elevation;
+  const height = wall.topBack.elevation - bottom;
+  const count = Math.max(1, Math.round(height / DRAIN_BAND_M));
+  const back = wall.backOffset;
+  const [, , topFront, bottomFront] = wall.points;
+  const drains: OffsetPoint[][][] = [];
+  for (let i = 0; i < count; i += 1) {
+    const center = bottom + (height * (i + 0.5)) / count;
+    // 그 높이의 전면 — 전면은 기울어 위로 갈수록 배면에 가까움.
+    const front =
+      bottomFront.offset + (topFront.offset - bottomFront.offset) * ((center - bottom) / height);
+    const fall = (DRAIN_FALL * Math.abs(front - back)) / 2;
+    const runs: OffsetPoint[][] = [];
+    for (const side of [-0.5, 0.5]) {
+      const level = center + side * DRAIN_DIAMETER_M;
+      const run = insideRun(
+        { offset: back, elevation: level + fall },
+        { offset: front, elevation: level - fall },
+        wall.points,
+      );
+      if (run) runs.push(run);
+    }
+    drains.push(runs);
+  }
+  return drains;
+}
+
+/**
+ * 도수로 · 돌붙임 띠 단면(90-2) — 윗면 = 사면선(겹친 점 뺌) · 변마다 아래쪽(사면 안쪽) 단위 법선 ·
+ * 둘레 = 윗면 → 두께만큼 오프셋한 아랫면(거꾸로). 횡단 그림과 B05 3D 띠 솔리드가 같은 것을 쓴다.
+ */
+export function chuteBandOutline(
+  raw: OffsetPoint[],
+  thickness: number,
+): { top: OffsetPoint[]; normals: OffsetPoint[]; outline: OffsetPoint[] } | null {
+  if (!(thickness > 0)) return null;
+  const top = raw.filter(
+    (p, i) =>
+      i === 0 ||
+      Math.hypot(p.offset - raw[i - 1].offset, p.elevation - raw[i - 1].elevation) > 1e-6,
+  );
+  if (top.length < 2) return null;
+  // 변마다 아래쪽(사면 안쪽) 단위 법선
+  const normals = top.slice(1).map((p, i) => {
+    const dx = p.offset - top[i].offset;
+    const dz = p.elevation - top[i].elevation;
+    const length = Math.hypot(dx, dz);
+    const sign = dx / length > 0 ? -1 : 1;
+    return { offset: (sign * -dz) / length, elevation: (sign * dx) / length };
+  });
+  // 꺾임은 두 오프셋 선의 교점(마이터 · 너무 뾰족하면 두 배까지)
+  const bottom = top.map((p, i) => {
+    const a = normals[Math.max(i - 1, 0)];
+    const b = normals[Math.min(i, normals.length - 1)];
+    const sum = { offset: a.offset + b.offset, elevation: a.elevation + b.elevation };
+    const k = thickness / Math.max(sum.offset * a.offset + sum.elevation * a.elevation, 0.5);
+    return { offset: p.offset + sum.offset * k, elevation: p.elevation + sum.elevation * k };
+  });
+  return { top, normals, outline: [...top, ...bottom.reverse()] };
+}
+
+/** 꺾은선 앞에서부터 `lengthM` 까지(쓴 길이와 함께). */
+function trimPolyline(
+  points: readonly OffsetPoint[],
+  lengthM: number,
+): { points: OffsetPoint[]; used: number } {
+  const out = points.slice(0, 1);
+  let used = 0;
+  for (let i = 1; i < points.length && lengthM - used > 1e-9; i += 1) {
+    const [a, b] = [points[i - 1], points[i]];
+    const step = Math.hypot(b.offset - a.offset, b.elevation - a.elevation);
+    if (step < 1e-9) continue;
+    const t = Math.min((lengthM - used) / step, 1);
+    out.push({
+      offset: a.offset + (b.offset - a.offset) * t,
+      elevation: a.elevation + (b.elevation - a.elevation) * t,
+    });
+    used += step * t;
+  }
+  return { points: out, used };
+}
+
+/** 원지반 샘플 → 꺾은선(유효 점만 · 오프셋 차례). */
+export function groundLine(
+  samples: ReadonlyArray<{
+    offset_m?: number | null;
+    elevation_m?: number | null;
+    valid?: boolean;
+  }>,
+): OffsetPoint[] {
+  return samples
+    .filter((s) => s.valid !== false && s.offset_m != null && s.elevation_m != null)
+    .map((s) => ({ offset: s.offset_m as number, elevation: s.elevation_m as number }))
+    .sort((a, b) => a.offset - b.offset);
+}
+
+/**
+ * 도수로 · 돌붙임 선 길이(294-4) — 선들을 차례로 사면 따라 `lengthM` 까지 자름 · 사면보다 길면 마지막 끝에서
+ * 원지반(`ground`)을 바깥으로 따라 이어 그 길이까지 · 길이 없으면 그대로(원지반 닿으면 끝). 점 하나뿐인 선
+ * (사면 없음 · 끝이 이미 원지반)은 길이가 있으면 원지반 따라 · 없으면 안 그림. 그림 전용(수량 · 내역 무관).
+ */
+export function chuteRun<L extends { points: OffsetPoint[] }>(
+  lines: readonly L[],
+  lengthM?: number | null,
+  ground?: readonly OffsetPoint[],
+): L[] {
+  const drawn = (list: L[]) => list.filter((line) => line.points.length > 1);
+  if (!(lengthM && lengthM > 0) || !lines.length) return drawn([...lines]);
+  let left = lengthM;
+  const out: L[] = [];
+  for (const line of lines) {
+    if (left <= 1e-9) break;
+    const cut = trimPolyline(line.points, left);
+    out.push({ ...line, points: cut.points });
+    left -= cut.used;
+  }
+  const last = out[out.length - 1];
+  if (left > 1e-9 && ground?.length && last) {
+    const first = lines[0].points[0];
+    const end = last.points[last.points.length - 1];
+    const outward = Math.sign(end.offset - first.offset) || Math.sign(end.offset) || 1;
+    const along = [
+      end,
+      ...ground
+        .filter((p) => (p.offset - end.offset) * outward > 1e-6)
+        .sort((a, b) => (a.offset - b.offset) * outward),
+    ];
+    out.push({ ...last, points: trimPolyline(along, left).points });
+  }
+  return drawn(out);
+}
+
+/** 띠가 서는 유출 조각(152-3) — 성토 조각 + 내림 · 수평 절토 조각(3도 절토선 · 끝 ≤ 시작).
+ *  3도 선이 못 만나 복합경사로 오르는 절토 조각은 뺌. B06 관 · 흙막이 띠와 3D 띠가 같은 거름. */
+export function isChuteSegment(segment: { kind?: string; points: OffsetPoint[] }): boolean {
+  if (segment.kind !== "cut") return true;
+  const { points } = segment;
+  return points.length > 1 && points[points.length - 1].elevation <= points[0].elevation + 1e-6;
+}
diff --git a/B06_Section/B06_Section_Route_Carry_Patch.ts b/B06_Section/logic/B06_Section_Route_Carry_Patch.ts
similarity index 95%
rename from B06_Section/B06_Section_Route_Carry_Patch.ts
rename to B06_Section/logic/B06_Section_Route_Carry_Patch.ts
index e365281ef..50ac352de 100644
--- a/B06_Section/B06_Section_Route_Carry_Patch.ts
+++ b/B06_Section/logic/B06_Section_Route_Carry_Patch.ts
@@ -8,26 +8,26 @@
  *   · `routeCarryPatches` — 노선 바뀐 [저장]: 옛 노선 세션 칸 → 새 노선 서버 상세(측점 열쇠 넘김
  *     `logic/B06_Section_Route_Carry`) → 얹기 → patch(옛 브라우저 길 `carryAfterRouteSave` 와 같은 차례) ·
  *     서버 Node 입구 `stations.carry` 가 부름(`A00_Common/design/logic/design_calc_node_carry.ts`).
- * logic 밖 = 구조물 그림 기하(관 벽 · 단 · 구간 · 세월 · BOX 기본값)를 끔 — 서버 Node 묶음 알려진 끌림.
+ * 관 벽 · 단 · 구간 · 세월 · BOX 기본값 = 구조물 기하 파일(`_Cross_Culvert_Types` · `_Wire` · `_Ford_Geom` · `_Box_Geom`).
  * ========================================================================== */
 
 import type {
   CrossDesign,
   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 { 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";
+} 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 { PIPE_MATCH_M } from "../../common_util/common_util_pipe_match";
+import { inferStationInterval } from "../../common_util/common_util_station";
+import { applySpanPatch, WALL_MIN_PURE_HEIGHT_M } from "./B06_Section_UI_Cross_Culvert_Const";
+import { tierSpanOf } from "../B06_Section_UI_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";
-import { STRUCTURE_ADJUST_KEYS, USER_TOUCHED_KEYS } from "./logic/B06_Section_Design_Keys";
+import { ROW_CARRY_KEYS } from "./B06_Section_Station_Swap";
+import { mergeCrossPatches } from "./B06_Section_UI_Page_Patches";
+import { STRUCTURE_ADJUST_KEYS, USER_TOUCHED_KEYS } from "./B06_Section_Design_Keys";
 import {
   carryChainageStates,
   carryKeyedStates,
@@ -37,7 +37,7 @@ import {
   type KeyedState,
   type Owner,
   type Raw,
-} from "./logic/B06_Section_Route_Carry";
+} from "./B06_Section_Route_Carry";
 
 export type Cells = Record<string, unknown>;
 /** 누가거리(숫자) → 쪽마다 값(세션에 있는 쪽만 · 노견 확장 · 소단 깊이). */
diff --git a/B06_Section/B06_Section_Structure_Layouts.ts b/B06_Section/logic/B06_Section_Structure_Layouts.ts
similarity index 94%
rename from B06_Section/B06_Section_Structure_Layouts.ts
rename to B06_Section/logic/B06_Section_Structure_Layouts.ts
index abe2571dc..49f4d3e0d 100644
--- a/B06_Section/B06_Section_Structure_Layouts.ts
+++ b/B06_Section/logic/B06_Section_Structure_Layouts.ts
@@ -11,28 +11,28 @@
  * ========================================================================== */
 
 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 { 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 type { CrossSection } from "../B06_Section_Api_Fetch";
+import { withoutGuardedFill } from "./B06_Section_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 { REVET_EMBED_DEPTH_M } from "./B06_Section_UI_Cross_Culvert_Const";
+import { groundInterpolator } from "./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 {
   computeCardCulvert,
   culvertLinkFor,
   ownWallsDrawAt,
   tierSpanOf,
-} from "./B06_Section_UI_Cross_Culvert_Wire";
+} from "../B06_Section_UI_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";
-import { computeRevetmentLayout } from "./B06_Section_UI_Cross_Revetment";
+} 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";
+import { computeRevetmentLayout } from "./B06_Section_Cross_Revetment_Geom";
 
 /** 같은 측점으로 볼 누가거리 오차(m) — 정본 반올림 자릿수보다 크게 잡는다. */
 const CHAINAGE_TOLERANCE_M = 0.02;
diff --git a/B07_DesignDetail/B07_DesignDetail_Cross_Overlay.ts b/B07_DesignDetail/B07_DesignDetail_Cross_Overlay.ts
index 0af68f0fe..23f3dbb4e 100644
--- a/B07_DesignDetail/B07_DesignDetail_Cross_Overlay.ts
+++ b/B07_DesignDetail/B07_DesignDetail_Cross_Overlay.ts
@@ -12,13 +12,13 @@ import type { CrossSection } from "../B06_Section/B06_Section_Api_Fetch";
 import {
   computeStoredLayouts as computeLayouts,
   type StoredLayouts,
-} from "../B06_Section/B06_Section_Structure_Layouts";
+} from "../B06_Section/logic/B06_Section_Structure_Layouts";
 import { appendBoxOverlay } from "../B06_Section/B06_Section_UI_Cross_Box";
 import { appendCulvertOverlay } from "../B06_Section/B06_Section_UI_Cross_Culvert";
 import { appendFordOverlay } from "../B06_Section/B06_Section_UI_Cross_Ford";
 import { appendFordPavementOverlay } from "../B06_Section/B06_Section_UI_Cross_Ford_Pavement";
 import { appendUnderdrainOverlay } from "../B06_Section/B06_Section_UI_Cross_Underdrain";
-import { groundLine } from "../B06_Section/B06_Section_UI_Cross_Wall_Hatch";
+import { groundLine } from "../B06_Section/logic/B06_Section_Cross_Wall_Hatch_Geom";
 import {
   appendCrossDesignOverlay,
   appendPavementOverlay,
diff --git a/common_util/common_util_station.ts b/common_util/common_util_station.ts
index 471d77ad7..5cd2cd085 100644
--- a/common_util/common_util_station.ts
+++ b/common_util/common_util_station.ts
@@ -29,3 +29,19 @@ export function stationPartsLabel(
   const scale = decimals ? 10 : 1;
   return `${stationNumber}+${Math.round(remainder * scale) / scale}`;
 }
+
+/** 측점 간격을 실제 측점 배열에서 되짚는다(최빈 간격). 라벨 표기의 분모다. */
+export function inferStationInterval(stations: Array<{ chainage_m: number }>): number {
+  const counts = new Map<number, number>();
+  for (let index = 1; index < stations.length; index += 1) {
+    const difference = stations[index].chainage_m - stations[index - 1].chainage_m;
+    if (difference <= 0) continue;
+    const rounded = Math.round(difference * 10) / 10;
+    counts.set(rounded, (counts.get(rounded) ?? 0) + 1);
+  }
+  return (
+    [...counts.entries()].sort(
+      ([intervalA, countA], [intervalB, countB]) => countB - countA || intervalB - intervalA,
+    )[0]?.[0] ?? 1
+  );
+}
diff --git a/common_util/common_util_svg.ts b/common_util/common_util_svg.ts
index e03e9e6c5..47d9d8afe 100644
--- a/common_util/common_util_svg.ts
+++ b/common_util/common_util_svg.ts
@@ -33,20 +33,4 @@ export function svgText(
   return text;
 }
 
-/** 측점 간격을 실제 측점 배열에서 되짚는다(최빈 간격). 라벨 표기의 분모다. */
-export function inferStationInterval(stations: Array<{ chainage_m: number }>): number {
-  const counts = new Map<number, number>();
-  for (let index = 1; index < stations.length; index += 1) {
-    const difference = stations[index].chainage_m - stations[index - 1].chainage_m;
-    if (difference <= 0) continue;
-    const rounded = Math.round(difference * 10) / 10;
-    counts.set(rounded, (counts.get(rounded) ?? 0) + 1);
-  }
-  return (
-    [...counts.entries()].sort(
-      ([intervalA, countA], [intervalB, countB]) => countB - countA || intervalB - intervalA,
-    )[0]?.[0] ?? 1
-  );
-}
-
-export { stationLabel } from "./common_util_station";
+export { inferStationInterval, stationLabel } from "./common_util_station";
diff --git a/resources/tester/helper_107_ford_free.cjs b/resources/tester/helper_107_ford_free.cjs
index e780fdded..04987ce05 100644
--- a/resources/tester/helper_107_ford_free.cjs
+++ b/resources/tester/helper_107_ford_free.cjs
@@ -54,7 +54,7 @@ bodies.box.control.select(352.14, "left");
 out.released = released;
 
 // 107-2 — 원지반을 바꾼 사본: 세월교 바닥 = 노면 − (관경 + 토피) · 박스 본체 · 끝 · 날개 · 흙막이 자리 그대로
-const { computeStoredLayouts } = loadTs(B06("B06_Section_Structure_Layouts.ts"));
+const { computeStoredLayouts } = loadTs(B06("logic/B06_Section_Structure_Layouts.ts"));
 const fixture = JSON.parse(
   fs.readFileSync(path.join(__dirname, "fixtures", "b06_73_4_body_guard_sections.json"), "utf8"),
 );
diff --git a/resources/tester/helper_118_pipe_pick.cjs b/resources/tester/helper_118_pipe_pick.cjs
index 6b38ffe6a..b9c94c48d 100644
--- a/resources/tester/helper_118_pipe_pick.cjs
+++ b/resources/tester/helper_118_pipe_pick.cjs
@@ -120,7 +120,7 @@ const resolve = (base) =>
   ) ?? `${base}.ts`;
 
 const B06 = (f) => path.join(ROOT, "B06_Section", `${f}.ts`);
-const { computeStoredLayouts } = loadTs(B06("B06_Section_Structure_Layouts"));
+const { computeStoredLayouts } = loadTs(B06("logic/B06_Section_Structure_Layouts"));
 const { appendCulvertOverlay } = loadTs(B06("B06_Section_UI_Cross_Culvert"));
 const { wallStandsAt } = loadTs(B06("B06_Section_UI_Cross_Culvert_Wire"));
 const { applyStructurePick } = loadTs(B06("B06_Section_UI_Page_Structure_Pick"));
diff --git a/resources/tester/helper_135_3_chute_solid.cjs b/resources/tester/helper_135_3_chute_solid.cjs
index 5cb934254..0d7512e0b 100644
--- a/resources/tester/helper_135_3_chute_solid.cjs
+++ b/resources/tester/helper_135_3_chute_solid.cjs
@@ -32,7 +32,7 @@ const B06 = (f) => path.join(ROOT, "B06_Section", `${f}.ts`);
 const { buildCorridorStructures } = loadTs(B05("B05_Profile_UI_Corridor_Structures"));
 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 { chuteBandOutline, isChuteSegment } = loadTs(B06("logic/B06_Section_Cross_Wall_Hatch_Geom"));
 const { computeBoxLayout } = loadTs(B06("B06_Section_UI_Cross_Box_Geom"));
 const { computeFordLayout } = loadTs(B06("B06_Section_UI_Cross_Ford"));
 const { outletFillLine } = loadTs(B06("B06_Section_UI_Cross_Ford_Pavement"));
diff --git a/resources/tester/helper_137_design_pick.cjs b/resources/tester/helper_137_design_pick.cjs
index 208aa4da8..6c912dbe0 100644
--- a/resources/tester/helper_137_design_pick.cjs
+++ b/resources/tester/helper_137_design_pick.cjs
@@ -219,7 +219,7 @@ out.zone = {
 };
 
 // ⑤ 실제 측점 — 설계선 + 배관 오버레이를 그린 뒤 고름을 붙임(카드와 같은 차례)
-const { computeStoredLayouts } = loadTs(B06("B06_Section_Structure_Layouts"));
+const { computeStoredLayouts } = loadTs(B06("logic/B06_Section_Structure_Layouts"));
 const { appendCulvertOverlay } = loadTs(B06("B06_Section_UI_Cross_Culvert"));
 const { appendCrossDesignOverlay } = loadTs(B06("B06_Section_UI_Cross_Design"));
 const { raiseWalls } = loadTs(B06("B06_Section_UI_Cross_Wall"));
diff --git a/resources/tester/helper_139_4_buried_outlet.cjs b/resources/tester/helper_139_4_buried_outlet.cjs
index 98e709a4b..20547899d 100644
--- a/resources/tester/helper_139_4_buried_outlet.cjs
+++ b/resources/tester/helper_139_4_buried_outlet.cjs
@@ -29,7 +29,7 @@ const resolve = (base) =>
   ) ?? `${base}.ts`;
 
 const B06 = (f) => path.join(ROOT, "B06_Section", `${f}.ts`);
-const { computeStoredLayouts } = loadTs(B06("B06_Section_Structure_Layouts"));
+const { computeStoredLayouts } = loadTs(B06("logic/B06_Section_Structure_Layouts"));
 const { computeStructureAreas } = loadTs(
   path.join(ROOT, "common_util", "common_util_cross_structure_areas.ts"),
 );
diff --git a/resources/tester/helper_152_2_link_height.cjs b/resources/tester/helper_152_2_link_height.cjs
index b36bb3b4c..80e09e636 100644
--- a/resources/tester/helper_152_2_link_height.cjs
+++ b/resources/tester/helper_152_2_link_height.cjs
@@ -30,7 +30,7 @@ const resolve = (base) =>
   ) ?? `${base}.ts`;
 
 const B06 = (f) => path.join(ROOT, "B06_Section", f);
-const { computeStoredLayouts } = loadTs(B06("B06_Section_Structure_Layouts.ts"));
+const { computeStoredLayouts } = loadTs(B06("logic/B06_Section_Structure_Layouts.ts"));
 
 const fixture = JSON.parse(
   fs.readFileSync(path.join(__dirname, "fixtures", "b06_73_4_body_guard_sections.json"), "utf8"),
diff --git a/resources/tester/helper_152_3_chute_cut.cjs b/resources/tester/helper_152_3_chute_cut.cjs
index 2981239e8..f921e1666 100644
--- a/resources/tester/helper_152_3_chute_cut.cjs
+++ b/resources/tester/helper_152_3_chute_cut.cjs
@@ -29,8 +29,8 @@ const resolve = (base) =>
   ) ?? `${base}.ts`;
 
 const B06 = (f) => path.join(ROOT, "B06_Section", `${f}.ts`);
-const { computeStoredLayouts } = loadTs(B06("B06_Section_Structure_Layouts"));
-const { isChuteSegment, chuteBandOutline } = loadTs(B06("B06_Section_UI_Cross_Wall_Hatch"));
+const { computeStoredLayouts } = loadTs(B06("logic/B06_Section_Structure_Layouts"));
+const { isChuteSegment, chuteBandOutline } = loadTs(B06("logic/B06_Section_Cross_Wall_Hatch_Geom"));
 const { chuteBands } = loadTs(
   path.join(ROOT, "B05_Profile", "B05_Profile_UI_Corridor_Structures_Chute.ts"),
 );
diff --git a/resources/tester/helper_152_4_chute_pick.cjs b/resources/tester/helper_152_4_chute_pick.cjs
index 3ac79ab80..eb69336c7 100644
--- a/resources/tester/helper_152_4_chute_pick.cjs
+++ b/resources/tester/helper_152_4_chute_pick.cjs
@@ -125,7 +125,7 @@ const resolve = (base) =>
   ) ?? `${base}.ts`;
 
 const B06 = (f) => path.join(ROOT, "B06_Section", `${f}.ts`);
-const { computeStoredLayouts } = loadTs(B06("B06_Section_Structure_Layouts"));
+const { computeStoredLayouts } = loadTs(B06("logic/B06_Section_Structure_Layouts"));
 const { appendCulvertOverlay } = loadTs(B06("B06_Section_UI_Cross_Culvert"));
 const { attachChuteBandPick } = loadTs(B06("B06_Section_UI_Cross_Wall_Hatch"));
 const { applyStructurePick } = loadTs(B06("B06_Section_UI_Page_Structure_Pick"));
diff --git a/resources/tester/helper_152_5_pavement_pick.cjs b/resources/tester/helper_152_5_pavement_pick.cjs
index 857c34a2f..576092620 100644
--- a/resources/tester/helper_152_5_pavement_pick.cjs
+++ b/resources/tester/helper_152_5_pavement_pick.cjs
@@ -47,7 +47,11 @@ function loadTs(file, stubs = {}) {
   }).loadTs(file);
 }
 
-const surface = loadTs(path.join(ROOT, "B06_Section", "B06_Section_UI_Cross_Design_Surface.ts"));
+const surface = loadTs(path.join(ROOT, "B06_Section", "B06_Section_UI_Cross_Design_Surface.ts"), {
+  "./logic/B06_Section_Cross_Design_Surface_Geom": loadTs(
+    path.join(ROOT, "B06_Section", "logic", "B06_Section_Cross_Design_Surface_Geom.ts"),
+  ),
+});
 const selection = loadTs(path.join(ROOT, "A00_Common", "design", "design_selection.ts"), {
   "../../common_util/common_util_pipe_match": { PIPE_MATCH_M: 0.51 }, // 찾는 거리 정의 자리(472-6)
   "../b_page_state": { readState: () => null, writeState: () => {} },
diff --git a/resources/tester/helper_178_3_slope_tiers.cjs b/resources/tester/helper_178_3_slope_tiers.cjs
index de8e4164f..1e6d8d6ff 100644
--- a/resources/tester/helper_178_3_slope_tiers.cjs
+++ b/resources/tester/helper_178_3_slope_tiers.cjs
@@ -35,7 +35,7 @@ const { ADDON_SPECS } = loadTs(design("logic/design_structure_slope_tier.ts"));
 const { STRUCTURE_SPECS } = loadTs(design("logic/design_structure_pipe.ts"));
 const { wallSpecsFrom } = loadTs(path.join(ROOT, "common_util", "common_util_structure_walls.ts"));
 const { computeRevetmentLayout } = loadTs(
-  path.join(ROOT, "B06_Section", "B06_Section_UI_Cross_Revetment.ts"),
+  path.join(ROOT, "B06_Section", "logic", "B06_Section_Cross_Revetment_Geom.ts"),
 );
 
 const r3 = (v) => Math.round(v * 1000) / 1000;
diff --git a/resources/tester/helper_186_1_outlet_fold.cjs b/resources/tester/helper_186_1_outlet_fold.cjs
index 0b754a8b7..a42493be7 100644
--- a/resources/tester/helper_186_1_outlet_fold.cjs
+++ b/resources/tester/helper_186_1_outlet_fold.cjs
@@ -30,7 +30,7 @@ const resolve = (base) =>
   ) ?? `${base}.ts`;
 
 const B06 = (f) => path.join(ROOT, "B06_Section", f);
-const { computeStoredLayouts, structureAreaRows } = loadTs(B06("B06_Section_Structure_Layouts.ts"));
+const { computeStoredLayouts, structureAreaRows } = loadTs(B06("logic/B06_Section_Structure_Layouts.ts"));
 const { computeCulvertLayout } = loadTs(B06("B06_Section_UI_Cross_Culvert_Geom.ts"));
 const read = (name) =>
   JSON.parse(fs.readFileSync(path.join(__dirname, "fixtures", name), "utf8")).cross_sections;
diff --git a/resources/tester/helper_190_1_basin_pick.cjs b/resources/tester/helper_190_1_basin_pick.cjs
index 2206c2fae..3aac4ae24 100644
--- a/resources/tester/helper_190_1_basin_pick.cjs
+++ b/resources/tester/helper_190_1_basin_pick.cjs
@@ -80,7 +80,7 @@ const resolve = (base) =>
   ) ?? `${base}.ts`;
 
 const B06 = (f) => path.join(ROOT, "B06_Section", `${f}.ts`);
-const { computeStoredLayouts } = loadTs(B06("B06_Section_Structure_Layouts"));
+const { computeStoredLayouts } = loadTs(B06("logic/B06_Section_Structure_Layouts"));
 const { appendCulvertOverlay } = loadTs(B06("B06_Section_UI_Cross_Culvert"));
 const { outlineBox } = loadTs(B06("B06_Section_UI_Cross_Culvert_Types"));
 
diff --git a/resources/tester/helper_280_3_route_undo_facilities.cjs b/resources/tester/helper_280_3_route_undo_facilities.cjs
index 74fc8bb1c..c964b4727 100644
--- a/resources/tester/helper_280_3_route_undo_facilities.cjs
+++ b/resources/tester/helper_280_3_route_undo_facilities.cjs
@@ -223,7 +223,7 @@ const pageMod = load("A00_Common", "design", "design_pipeline_page.ts");
 const storeMod = load("A00_Common", "design", "design_store.ts");
 const sectionStore = load("B06_Section", "B06_Section_Section_Store.ts");
 const common = load("B06_Section", "B06_Section_UI_Section_Common.ts");
-const layouts = load("B06_Section", "B06_Section_Structure_Layouts.ts");
+const layouts = load("B06_Section", "logic", "B06_Section_Structure_Layouts.ts");
 const profileData = load("B05_Profile", "logic", "B05_Profile_UI_Profile_Data.ts");
 const alignmentMod = load("B05_Profile", "logic", "B05_Profile_UI_Profile_Alignment.ts");
 const baseMod = load("A00_Common", "design", "design_profile_base.ts");
diff --git a/resources/tester/helper_286_1_ford_pavement.cjs b/resources/tester/helper_286_1_ford_pavement.cjs
index af326b295..07a7301b9 100644
--- a/resources/tester/helper_286_1_ford_pavement.cjs
+++ b/resources/tester/helper_286_1_ford_pavement.cjs
@@ -23,11 +23,20 @@ function loadTs(file, stubs = {}) {
 const input = JSON.parse(fs.readFileSync(process.argv[2], "utf8"));
 const station = loadTs(path.join(ROOT, "common_util", "common_util_structure_station.ts"));
 
+// 띠 기하(472-3 logic) — 그림 파일 · 물넘이포장이 같은 모듈
+const hatchGeom = loadTs(
+  path.join(ROOT, "B06_Section", "logic", "B06_Section_Cross_Wall_Hatch_Geom.ts"),
+  { "./B06_Section_UI_Cross_Culvert_Const": {} },
+);
 const ford = loadTs(path.join(ROOT, "B06_Section", "B06_Section_UI_Cross_Ford_Pavement.ts"), {
   "./B06_Section_UI_Cross_Wall_Hatch": loadTs(
     path.join(ROOT, "B06_Section", "B06_Section_UI_Cross_Wall_Hatch.ts"),
-    { "./logic/B06_Section_UI_Cross_Culvert_Const": {} },
+    {
+      "./logic/B06_Section_UI_Cross_Culvert_Const": {},
+      "./logic/B06_Section_Cross_Wall_Hatch_Geom": hatchGeom,
+    },
   ),
+  "./logic/B06_Section_Cross_Wall_Hatch_Geom": hatchGeom,
   "./B06_Section_UI_Cross_Design_Surface": { appendPavementOverlay() {} },
   // 관 신원표(323-5 · 472-2 에서 common_util 로) — 진짜 · 장부 안 꽂음 = 옛 자리 이름
   "../common_util/common_util_pick_tag": loadTs(
diff --git a/resources/tester/helper_294_3_ford_extend_chute.cjs b/resources/tester/helper_294_3_ford_extend_chute.cjs
index d4a04dc54..d61cdb918 100644
--- a/resources/tester/helper_294_3_ford_extend_chute.cjs
+++ b/resources/tester/helper_294_3_ford_extend_chute.cjs
@@ -56,7 +56,7 @@ pave.appendFordPavementOverlay(
 const paveLayer = svg.children.find((k) => (k.attrs.class ?? "").includes("ford-pavement"));
 
 // 294-4 도수로 · 돌붙임 끝단 · 길이
-const hatch = load(path.join(ROOT, "B06_Section", "B06_Section_UI_Cross_Wall_Hatch.ts"));
+const hatch = load(path.join(ROOT, "B06_Section", "logic", "B06_Section_Cross_Wall_Hatch_Geom.ts"));
 const P = (offset, elevation) => ({ offset, elevation });
 const slope = [{ points: [P(0, 0), P(3, -4)], kind: "fill" }]; // 사면 5 m
 const flat = [P(3, -4), P(5, -4), P(8, -4)]; // 사면 끝 바깥 원지반
diff --git a/resources/tester/helper_315_ford_chute_overflow.cjs b/resources/tester/helper_315_ford_chute_overflow.cjs
index f32a65852..90b3a6163 100644
--- a/resources/tester/helper_315_ford_chute_overflow.cjs
+++ b/resources/tester/helper_315_ford_chute_overflow.cjs
@@ -44,7 +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 hatch = load(path.join(ROOT, "B06_Section", "B06_Section_UI_Cross_Wall_Hatch.ts"));
+const hatch = load(path.join(ROOT, "B06_Section", "logic", "B06_Section_Cross_Wall_Hatch_Geom.ts"));
 const fillGround = hatch.groundLine(input.fillSamples);
 const dipGround = hatch.groundLine(input.dipSamples);
 const chute = (design, ground, length) =>
diff --git a/resources/tester/helper_318_cross_card.cjs b/resources/tester/helper_318_cross_card.cjs
index c574bec62..870aa8fc2 100644
--- a/resources/tester/helper_318_cross_card.cjs
+++ b/resources/tester/helper_318_cross_card.cjs
@@ -592,10 +592,16 @@ const loadDrafts = makeLoader(
 );
 
 // ── 6. B05 [저장](캐시 patch) — 종류 바꾼 측점 = structure_reset · 옛 조정값 안 실음 ─────
+const DESIGN_KEYS = {
+  USER_TOUCHED_KEYS: ["display_half_width_m", "ford_adjust", "revet_adjust", "berm"],
+  STRUCTURE_ADJUST_KEYS: makeLoader([B06("logic/B06_Section_Design_Keys")])(
+    B06("logic/B06_Section_Design_Keys"),
+  ).STRUCTURE_ADJUST_KEYS,
+};
 const loadStore = makeLoader(
   [
     B06("B06_Section_Section_Store"),
-    B06("B06_Section_Route_Carry_Patch"), // patch 바탕 한 벌(472-6)
+    B06("logic/B06_Section_Route_Carry_Patch"), // patch 바탕 한 벌(472-6)
     B06("B06_Section_Api_Culvert_Options"),
     path.join(ROOT, "A00_Common", "b_page_state.ts"),
     path.join(ROOT, "A00_Common", "design", "design_selection.ts"),
@@ -605,12 +611,9 @@ const loadStore = makeLoader(
     "./B06_Section_Cross_Refresh": {
       USER_TOUCHED_KEYS: ["display_half_width_m", "ford_adjust", "revet_adjust", "berm"],
     },
-    "./logic/B06_Section_Design_Keys": {
-      USER_TOUCHED_KEYS: ["display_half_width_m", "ford_adjust", "revet_adjust", "berm"],
-      STRUCTURE_ADJUST_KEYS: makeLoader([B06("logic/B06_Section_Design_Keys")])(
-        B06("logic/B06_Section_Design_Keys"),
-      ).STRUCTURE_ADJUST_KEYS,
-    },
+    "./logic/B06_Section_Design_Keys": DESIGN_KEYS,
+    // patch 바탕(logic/Route_Carry_Patch · 472-3)이 부르는 이름
+    "./B06_Section_Design_Keys": DESIGN_KEYS,
   },
 );
 
diff --git a/resources/tester/helper_322_0_golden.cjs b/resources/tester/helper_322_0_golden.cjs
index c8a78b601..bfbacc033 100644
--- a/resources/tester/helper_322_0_golden.cjs
+++ b/resources/tester/helper_322_0_golden.cjs
@@ -118,7 +118,7 @@ const STUBS = new Map([
     { kindChangedChainages: () => [], STRUCTURE_ADJUST_KEYS: [] },
   ],
   [
-    B06("B06_Section_Structure_Layouts"),
+    B06("logic/B06_Section_Structure_Layouts"),
     { applyStructureAreaRows: () => {}, structureAreaRows: () => [] },
   ],
   [
@@ -212,7 +212,7 @@ const {
 const { loadSectionDetail } = loadTs(B06("B06_Section_Section_Store"));
 const { forgetDraftStations } = loadTs(B06("B06_Section_Section_Drafts"));
 const { buildCorridorStructures } = loadTs(B05("B05_Profile_UI_Corridor_Structures"));
-const { computeRevetmentLayout } = loadTs(B06("B06_Section_UI_Cross_Revetment"));
+const { computeRevetmentLayout } = loadTs(B06("logic/B06_Section_Cross_Revetment_Geom"));
 const { buildStructureLane } = loadTs(B05("B05_Profile_UI_Structures_Marks"));
 const { pickGroups } = loadTs(B05("B05_Profile_UI_Structures_Panel_Types"));
 const { structureDisplayName } = loadTs(B06("B06_Section_UI_Section_Common"));
diff --git a/resources/tester/helper_349_0o_redo_same.cjs b/resources/tester/helper_349_0o_redo_same.cjs
index b95cd24e7..eb80ee2cd 100644
--- a/resources/tester/helper_349_0o_redo_same.cjs
+++ b/resources/tester/helper_349_0o_redo_same.cjs
@@ -193,7 +193,7 @@ const pageMod = load("A00_Common", "design", "design_pipeline_page.ts");
 const storeMod = load("A00_Common", "design", "design_store.ts");
 const sectionStore = load("B06_Section", "B06_Section_Section_Store.ts");
 const common = load("B06_Section", "B06_Section_UI_Section_Common.ts");
-const layouts = load("B06_Section", "B06_Section_Structure_Layouts.ts");
+const layouts = load("B06_Section", "logic", "B06_Section_Structure_Layouts.ts");
 const profileData = load("B05_Profile", "logic", "B05_Profile_UI_Profile_Data.ts");
 const alignmentMod = load("B05_Profile", "logic", "B05_Profile_UI_Profile_Alignment.ts");
 const baseMod = load("A00_Common", "design", "design_profile_base.ts");
diff --git a/resources/tester/helper_349_0q_undo_echo.cjs b/resources/tester/helper_349_0q_undo_echo.cjs
index 9146264e3..78a6ad618 100644
--- a/resources/tester/helper_349_0q_undo_echo.cjs
+++ b/resources/tester/helper_349_0q_undo_echo.cjs
@@ -231,7 +231,7 @@ const pageMod = load("A00_Common", "design", "design_pipeline_page.ts");
 const storeMod = load("A00_Common", "design", "design_store.ts");
 const sectionStore = load("B06_Section", "B06_Section_Section_Store.ts");
 const common = load("B06_Section", "B06_Section_UI_Section_Common.ts");
-const layouts = load("B06_Section", "B06_Section_Structure_Layouts.ts");
+const layouts = load("B06_Section", "logic", "B06_Section_Structure_Layouts.ts");
 const profileData = load("B05_Profile", "logic", "B05_Profile_UI_Profile_Data.ts");
 const alignmentMod = load("B05_Profile", "logic", "B05_Profile_UI_Profile_Alignment.ts");
 const baseMod = load("A00_Common", "design", "design_profile_base.ts");
diff --git a/resources/tester/helper_356_4_undo_grade.cjs b/resources/tester/helper_356_4_undo_grade.cjs
index 96f614fcf..c031f46cb 100644
--- a/resources/tester/helper_356_4_undo_grade.cjs
+++ b/resources/tester/helper_356_4_undo_grade.cjs
@@ -224,7 +224,7 @@ const pageMod = load("A00_Common", "design", "design_pipeline_page.ts");
 const storeMod = load("A00_Common", "design", "design_store.ts");
 const sectionStore = load("B06_Section", "B06_Section_Section_Store.ts");
 const common = load("B06_Section", "B06_Section_UI_Section_Common.ts");
-const layouts = load("B06_Section", "B06_Section_Structure_Layouts.ts");
+const layouts = load("B06_Section", "logic", "B06_Section_Structure_Layouts.ts");
 const profileData = load("B05_Profile", "logic", "B05_Profile_UI_Profile_Data.ts");
 const alignmentMod = load("B05_Profile", "logic", "B05_Profile_UI_Profile_Alignment.ts");
 const baseMod = load("A00_Common", "design", "design_profile_base.ts");
diff --git a/resources/tester/helper_384_4_adjusts.cjs b/resources/tester/helper_384_4_adjusts.cjs
index 5ae01db00..a25f2b152 100644
--- a/resources/tester/helper_384_4_adjusts.cjs
+++ b/resources/tester/helper_384_4_adjusts.cjs
@@ -42,7 +42,7 @@ function memoryStorage() {
 globalThis.window = { sessionStorage: memoryStorage(), localStorage: memoryStorage() };
 
 const B06 = (f) => path.join(ROOT, "B06_Section", `${f}.ts`);
-const { structureAreaRows } = loadTs(B06("B06_Section_Structure_Layouts"));
+const { structureAreaRows } = loadTs(B06("logic/B06_Section_Structure_Layouts"));
 const { withDraftAdjusts } = loadTs(B06("B06_Section_Section_Adjusts"));
 const { writeState } = loadTs(path.join(ROOT, "A00_Common", "b_page_state.ts"));
 
diff --git a/resources/tester/helper_387_4b_pipe_options.cjs b/resources/tester/helper_387_4b_pipe_options.cjs
index af8cf6a80..342b1b105 100644
--- a/resources/tester/helper_387_4b_pipe_options.cjs
+++ b/resources/tester/helper_387_4b_pipe_options.cjs
@@ -43,7 +43,7 @@ function memoryStorage() {
 globalThis.window = { sessionStorage: memoryStorage(), localStorage: memoryStorage() };
 
 const B06 = (f) => path.join(ROOT, "B06_Section", `${f}.ts`);
-const { structureAreaRows, computeStoredLayouts } = loadTs(B06("B06_Section_Structure_Layouts"));
+const { structureAreaRows, computeStoredLayouts } = loadTs(B06("logic/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"));
diff --git a/resources/tester/helper_428_pipe_move_entry.ts b/resources/tester/helper_428_pipe_move_entry.ts
index 4a36f9bd0..59f39c585 100644
--- a/resources/tester/helper_428_pipe_move_entry.ts
+++ b/resources/tester/helper_428_pipe_move_entry.ts
@@ -5,7 +5,7 @@ export {
   applyStructureAreaRows,
   computeStoredLayouts,
   structureAreaRows,
-} from "../../B06_Section/B06_Section_Structure_Layouts";
+} from "../../B06_Section/logic/B06_Section_Structure_Layouts";
 export { rememberRockBoundaryDefault } from "../../B06_Section/B06_Section_UI_Standard_Panel";
 export { writeState } from "../../A00_Common/b_page_state";
 export { rebasePipeDraft } from "../../common_util/common_util_route_follow";
diff --git a/resources/tester/helper_445_save_patch.cjs b/resources/tester/helper_445_save_patch.cjs
index 6ebdeb7f5..b3467caab 100644
--- a/resources/tester/helper_445_save_patch.cjs
+++ b/resources/tester/helper_445_save_patch.cjs
@@ -76,7 +76,7 @@ const load = makeLoader(
     B06("logic/B06_Section_UI_Page_Patches"),
     B06("logic/B06_Section_Design_Keys"), // 칸 목록 · 얹기 · patch 꼴 한 벌(472-6)
     B06("logic/B06_Section_Route_Carry"),
-    B06("B06_Section_Route_Carry_Patch"),
+    B06("logic/B06_Section_Route_Carry_Patch"),
     path.join(ROOT, "common_util", "common_util_pipe_match.ts"),
     path.join(ROOT, "A00_Common", "b_page_state.ts"),
     path.join(ROOT, "A00_Common", "design", "design_selection.ts"),
diff --git a/resources/tester/helper_472_1_browser_entry.ts b/resources/tester/helper_472_1_browser_entry.ts
index c367bec69..fe5c74b9f 100644
--- a/resources/tester/helper_472_1_browser_entry.ts
+++ b/resources/tester/helper_472_1_browser_entry.ts
@@ -29,7 +29,7 @@ export { createCrossStage } from "../../B06_Section/logic/B06_Section_Cross_Stag
 export {
   applyStructureAreaRows,
   structureAreaRows,
-} from "../../B06_Section/B06_Section_Structure_Layouts";
+} from "../../B06_Section/logic/B06_Section_Structure_Layouts";
 export { bermSpansFromStructures, bermSpecAt } from "../../B06_Section/B06_Section_UI_Page_Persist";
 export { parseDtmGrid } from "../../common_util/common_util_surface_sampler";
 export { computeMassHaul } from "../../common_util/common_util_mass_haul";
diff --git a/resources/tester/helper_472_6_route_entry.ts b/resources/tester/helper_472_6_route_entry.ts
index c78f04b57..1c6a77528 100644
--- a/resources/tester/helper_472_6_route_entry.ts
+++ b/resources/tester/helper_472_6_route_entry.ts
@@ -20,7 +20,7 @@ export {
   withCarriedEdits,
   withDraftAdjusts,
 } from "../../B06_Section/B06_Section_Section_Adjusts";
-export { crossPatchesFromCache } from "../../B06_Section/B06_Section_Route_Carry_Patch";
+export { crossPatchesFromCache } from "../../B06_Section/logic/B06_Section_Route_Carry_Patch";
 export { mergeCrossPatches } from "../../B06_Section/logic/B06_Section_UI_Page_Patches";
 export { kindChangedChainages } from "../../B06_Section/B06_Section_Api_Culvert_Options";
 export { pipeChainageOf } from "../../A00_Common/design/design_pipe_ids";
diff --git a/resources/tester/helper_73_4_body_guard.cjs b/resources/tester/helper_73_4_body_guard.cjs
index ba0734a27..cea3b5c0e 100644
--- a/resources/tester/helper_73_4_body_guard.cjs
+++ b/resources/tester/helper_73_4_body_guard.cjs
@@ -31,9 +31,9 @@ const resolve = (base) =>
 
 const B06 = (f) => path.join(ROOT, "B06_Section", f);
 const { computeStoredLayouts, structureAreaRows, trimOfLayouts } = loadTs(
-  B06("B06_Section_Structure_Layouts.ts"),
+  B06("logic/B06_Section_Structure_Layouts.ts"),
 );
-const { bodyGuardBase } = loadTs(B06("B06_Section_UI_Cross_Body_Guard.ts"));
+const { bodyGuardBase } = loadTs(B06("logic/B06_Section_Cross_Body_Guard.ts"));
 
 const fixture = JSON.parse(
   fs.readFileSync(path.join(__dirname, "fixtures", "b06_73_4_body_guard_sections.json"), "utf8"),
diff --git a/resources/tester/helper_79_guard_shape.cjs b/resources/tester/helper_79_guard_shape.cjs
index b0b53c880..30fba8dde 100644
--- a/resources/tester/helper_79_guard_shape.cjs
+++ b/resources/tester/helper_79_guard_shape.cjs
@@ -29,11 +29,11 @@ const resolve = (base) =>
   ) ?? `${base}.ts`;
 
 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 { computeStoredLayouts, structureAreaRows } = loadTs(B06("logic/B06_Section_Structure_Layouts.ts"));
+const { bodyGuardBase } = loadTs(B06("logic/B06_Section_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 { computeRevetmentLayout } = loadTs(B06("B06_Section_UI_Cross_Revetment.ts"));
+const { computeRevetmentLayout } = loadTs(B06("logic/B06_Section_Cross_Revetment_Geom.ts"));
 
 const fixture = JSON.parse(
   fs.readFileSync(path.join(__dirname, "fixtures", "b06_73_4_body_guard_sections.json"), "utf8"),
diff --git a/resources/tester/helper_80_ford_pipe.cjs b/resources/tester/helper_80_ford_pipe.cjs
index 34ca92bb7..d12ecf104 100644
--- a/resources/tester/helper_80_ford_pipe.cjs
+++ b/resources/tester/helper_80_ford_pipe.cjs
@@ -29,7 +29,7 @@ const resolve = (base) =>
   ) ?? `${base}.ts`;
 
 const B06 = (f) => path.join(ROOT, "B06_Section", f);
-const { computeStoredLayouts } = loadTs(B06("B06_Section_Structure_Layouts.ts"));
+const { computeStoredLayouts } = loadTs(B06("logic/B06_Section_Structure_Layouts.ts"));
 
 const fixture = JSON.parse(
   fs.readFileSync(path.join(__dirname, "fixtures", "b06_73_4_body_guard_sections.json"), "utf8"),
diff --git a/resources/tester/helper_91_ground_free.cjs b/resources/tester/helper_91_ground_free.cjs
index ae12a5ccf..854dc0444 100644
--- a/resources/tester/helper_91_ground_free.cjs
+++ b/resources/tester/helper_91_ground_free.cjs
@@ -29,7 +29,7 @@ const resolve = (base) =>
   ) ?? `${base}.ts`;
 
 const B06 = (f) => path.join(ROOT, "B06_Section", f);
-const { computeStoredLayouts } = loadTs(B06("B06_Section_Structure_Layouts.ts"));
+const { computeStoredLayouts } = loadTs(B06("logic/B06_Section_Structure_Layouts.ts"));
 
 const fixture = JSON.parse(
   fs.readFileSync(path.join(__dirname, "fixtures", "b06_73_4_body_guard_sections.json"), "utf8"),
diff --git a/resources/tester/test_131_b08_material_fix.py b/resources/tester/test_131_b08_material_fix.py
index dd109183e..1ebbf4871 100644
--- a/resources/tester/test_131_b08_material_fix.py
+++ b/resources/tester/test_131_b08_material_fix.py
@@ -167,7 +167,9 @@ def test_B06_새_키_한_벌():
     assert CrossSectionPatch(chainage_m=1, ford_pipe_length_m=9).ford_pipe_length_m == 9
     with pytest.raises(ValueError):
         CrossSectionPatch(chainage_m=1, ford_pipe_length_m=-1)
-    layouts = (ROOT / "B06_Section" / "B06_Section_Structure_Layouts.ts").read_text("utf-8")
+    layouts = (ROOT / "B06_Section" / "logic" / "B06_Section_Structure_Layouts.ts").read_text(
+        "utf-8"
+    )
     block = layouts[layouts.index("STRUCTURE_ROW_KEYS = [") :][:900]
     assert '"ford_pipe_length_m"' in block
 
diff --git a/resources/tester/test_178_1_slope_wall_guard.py b/resources/tester/test_178_1_slope_wall_guard.py
index d16520092..142950c7d 100644
--- a/resources/tester/test_178_1_slope_wall_guard.py
+++ b/resources/tester/test_178_1_slope_wall_guard.py
@@ -76,7 +76,7 @@ def test_관_벽이_서는_측점은_독립_벽을_안_그린다(bundle, tmp_pat
 def test_카드_서버_3D_가_가드_한_벌을_쓴다():
     files = {
         "카드": ROOT / "B06_Section" / "B06_Section_UI_Cross_View.ts",
-        "서버 면적 · B07": ROOT / "B06_Section" / "B06_Section_Structure_Layouts.ts",
+        "서버 면적 · B07": ROOT / "B06_Section" / "logic" / "B06_Section_Structure_Layouts.ts",
         "3D": ROOT / "B05_Profile" / "B05_Profile_UI_Corridor_Structures.ts",
     }
     for where, path in files.items():
diff --git a/resources/tester/test_346_3_route_save_screen.py b/resources/tester/test_346_3_route_save_screen.py
index 7c6957578..f99857c69 100644
--- a/resources/tester/test_346_3_route_save_screen.py
+++ b/resources/tester/test_346_3_route_save_screen.py
@@ -134,7 +134,7 @@ def test_넘김_알림은_결과_한_줄에_합침():
     keys = _read("B06_Section/B06_Section_Station_Keys.ts")
     assert "{ quiet = false, applyTo = toRouteId }: { quiet?: boolean; applyTo?: number }" in keys
     assert "if (outside.size && !quiet)" in keys
-    patch = _read("B06_Section/B06_Section_Route_Carry_Patch.ts")
+    patch = _read("B06_Section/logic/B06_Section_Route_Carry_Patch.ts")
     assert "outside: keyed.outside.size + chain.outside.size" in patch
     # 498-3 — 결과 한 줄 걷음 · 남김 = 따라감 실패 · 새 교차 관
     save = _read("A00_Common/design/design_save.ts")
diff --git a/resources/tester/test_445_save_patch.py b/resources/tester/test_445_save_patch.py
index 9afe1f1e8..34274eddb 100644
--- a/resources/tester/test_445_save_patch.py
+++ b/resources/tester/test_445_save_patch.py
@@ -233,7 +233,9 @@ def test_M5_새_행은_버린_수에_안_셈():
 def test_H5_노선_저장_뒤_본문_M7_kindreset_옮김():
     # 472-6 6-B — 노선 저장 뒤 본문 = 서버 Node 넘김(`routeCarryPatches` · 옛 `saveCachedCrossPatches` ·
     # `sessionOverlay` 몸통 그대로) · 표준 횡단면 · 풍선 = 브라우저 횡단 조각(`routeCarryPart`)
-    patch = (ROOT / "B06_Section" / "B06_Section_Route_Carry_Patch.ts").read_text(encoding="utf-8")
+    patch = (ROOT / "B06_Section" / "logic" / "B06_Section_Route_Carry_Patch.ts").read_text(
+        encoding="utf-8"
+    )
     body = patch[patch.index("export function routeCarryPatches") :]
     for needle in (
         "crossPatchesFromCache(detail, kindChanged, savedAt)",
@@ -245,7 +247,10 @@ def test_H5_노선_저장_뒤_본문_M7_kindreset_옮김():
         assert needle in body, needle
     apply = (ROOT / "B05_Profile" / "B05_Profile_UI_RouteEdit_Apply.ts").read_text(encoding="utf-8")
     part = apply[apply.index("export function routeCarryPart") :]
-    for needle in ("readStandardCrossSession(projectId)", "balloon_offsets: balloonOffsetsPayload()"):
+    for needle in (
+        "readStandardCrossSession(projectId)",
+        "balloon_offsets: balloonOffsetsPayload()",
+    ):
         assert needle in part, needle
     persist = (ROOT / "B06_Section" / "B06_Section_UI_Page_Persist.ts").read_text(encoding="utf-8")
     assert (
diff --git a/resources/tester/test_472_3_calc_registry.py b/resources/tester/test_472_3_calc_registry.py
index 4812d13dd..efca83e3c 100644
--- a/resources/tester/test_472_3_calc_registry.py
+++ b/resources/tester/test_472_3_calc_registry.py
@@ -95,8 +95,6 @@ GEOMETRY_PULLS = (
     "B05_Profile/B05_Profile_UI_Corridor_Structures_Box.ts",
     "B05_Profile/B05_Profile_UI_Corridor_Structures_Chute.ts",
     "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",
@@ -105,16 +103,13 @@ GEOMETRY_PULLS = (
     "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",
+    # 518-3 기하는 logic 으로 · 그리기 함수(띠 · 터파기 · 포장층)를 위 Culvert · Box · Ford 그림 파일이 부름 — 518-2 뒤 걷음
+    "B06_Section/B06_Section_UI_Cross_Design_Surface.ts",
+    "B06_Section/B06_Section_UI_Cross_Excavation.ts",
     "B06_Section/B06_Section_UI_Cross_Wall_Hatch.ts",
-    # 노선 바뀐 [저장] 넘김 patch(472-6 6-B) — 세션 칸 → 설계 칸 얹기가 관 벽 · 단 · 세월 · BOX 기본값(위 그림 파일)을 씀
-    "B06_Section/B06_Section_Route_Carry_Patch.ts",
 )
 # 묶음 단계 입구(511-B B-1) planline 저장 기준(`plantedBase`) 끌림 11 = B-3 이 logic 으로 옮겨 걷음
 KNOWN_PULLS = set(SESSION_PULLS) | set(GEOMETRY_PULLS)
diff --git a/resources/tester/test_511_a_calc_mirror.py b/resources/tester/test_511_a_calc_mirror.py
index 70177c631..dcf03c8bf 100644
--- a/resources/tester/test_511_a_calc_mirror.py
+++ b/resources/tester/test_511_a_calc_mirror.py
@@ -75,7 +75,7 @@ def test_quantity_F7_C4_E1_서버_브라우저_같음(tmp_path):
     conv = _fixture("context.json")["earthwork_conversion"]
     long_ = detail["longitudinal"]
     calls = [
-        {"mod": "B06_Section/B06_Section_Structure_Layouts.ts", "fn": "structureAreaRows",
+        {"mod": "B06_Section/logic/B06_Section_Structure_Layouts.ts", "fn": "structureAreaRows",
          "args": [sections]},
         {"mod": "common_util/common_util_mass_haul.ts", "fn": "computeMassHaulSeries",
          "args": [long_, sections, conv, None, ["cross"]]},
diff --git a/resources/tester/test_511_c_haul_node.py b/resources/tester/test_511_c_haul_node.py
index 361782939..9349d8baa 100644
--- a/resources/tester/test_511_c_haul_node.py
+++ b/resources/tester/test_511_c_haul_node.py
@@ -185,7 +185,7 @@ def test_저장_정본_새_길_브라우저_같음(name, monkeypatch, tmp_path):
     detail = json.loads((GOLDEN / "detail.json").read_text(encoding="utf-8"))
     node_input = {"detail": detail, "context": _contexts()[name]}
     new = prebuild._node_output(copy.deepcopy(node_input))
-    layouts = "B06_Section/B06_Section_Structure_Layouts.ts"
+    layouts = "B06_Section/logic/B06_Section_Structure_Layouts.ts"
     sections = detail["cross_sections"]
     areas, walls = _browser(
         tmp_path,
diff --git a/resources/tester/test_b06_pipe_length.py b/resources/tester/test_b06_pipe_length.py
index 009458f02..f2cb5ff90 100644
--- a/resources/tester/test_b06_pipe_length.py
+++ b/resources/tester/test_b06_pipe_length.py
@@ -20,7 +20,7 @@ if str(PROJECT_ROOT) not in sys.path:
 
 from B06_Section.B06_Section_Schema import CrossSectionPatch  # noqa: E402
 
-_LAYOUTS = PROJECT_ROOT / "B06_Section" / "B06_Section_Structure_Layouts.ts"
+_LAYOUTS = PROJECT_ROOT / "B06_Section" / "logic" / "B06_Section_Structure_Layouts.ts"
 _PERSIST = PROJECT_ROOT / "B06_Section" / "B06_Section_UI_Page_Persist.ts"
 _TYPES = PROJECT_ROOT / "B06_Section" / "B06_Section_Api_Types.ts"
 
diff --git a/resources/tester/test_b06_wall_drain_pipe.py b/resources/tester/test_b06_wall_drain_pipe.py
index f55524466..c26459f0f 100644
--- a/resources/tester/test_b06_wall_drain_pipe.py
+++ b/resources/tester/test_b06_wall_drain_pipe.py
@@ -29,7 +29,7 @@ const make = (tag) => ({
   set textContent(v) { this.text = v; },
 });
 globalThis.document = { createElementNS: (_ns, tag) => make(tag) };
-const { buildRevetWallGeometry } = await import("./B06_Section_UI_Cross_Wall.js");
+const { buildRevetWallGeometry } = await import("./logic/B06_Section_Cross_Wall_Geom.js");
 const { appendWallHatch } = await import("./B06_Section_UI_Cross_Wall_Hatch.js");
 const walk = (node, out = []) => {
   if (node.tag === "g" && node.attrs.class === "b06-chart__wall-drain") out.push(node);
@@ -80,6 +80,7 @@ def test_옹벽만_높이_15m_띠마다_파이프_하나(tmp_path: Path) -> None
             "node",
             str(TSC),
             str(B06 / "B06_Section_UI_Cross_Wall.ts"),
+            str(B06 / "logic" / "B06_Section_Cross_Wall_Geom.ts"),
             "--outDir",
             str(out),
             "--module",
@@ -121,7 +122,7 @@ def test_옹벽만_높이_15m_띠마다_파이프_하나(tmp_path: Path) -> None
 
 
 def test_옹벽_표식은_구조물_종류로() -> None:
-    source = (B06 / "B06_Section_UI_Cross_Revetment.ts").read_text(encoding="utf-8")
+    source = (B06 / "logic" / "B06_Section_Cross_Revetment_Geom.ts").read_text(encoding="utf-8")
     # 물빼기 표식 = 구조물 표 형상칸.weep(322-1) — 처음값은 옹벽만
     assert "catalogRow(spec.type_id)?.shapeOpts.weep" in source
     start = json.loads(
diff --git a/resources/tester/test_b06_wall_lean_table.py b/resources/tester/test_b06_wall_lean_table.py
index 64ebd2036..f9442e311 100644
--- a/resources/tester/test_b06_wall_lean_table.py
+++ b/resources/tester/test_b06_wall_lean_table.py
@@ -20,7 +20,7 @@ DATA_DIR = ROOT / "resources" / "data_masonry"
 
 GEOMETRY = [
     "B06_Section_UI_Cross_Culvert_Geom.ts",
-    "B06_Section_UI_Cross_Wall.ts",
+    "logic/B06_Section_Cross_Wall_Geom.ts",
     "B06_Section_UI_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..a968d5de9 100644
--- a/resources/tester/test_b06_wall_shape_unified.py
+++ b/resources/tester/test_b06_wall_shape_unified.py
@@ -21,7 +21,7 @@ TSC = PROJECT_ROOT / "config" / "node_modules" / "typescript" / "bin" / "tsc"
 
 _RUNNER = """
 import { writeFileSync } from "node:fs";
-import { buildRevetWallGeometry } from "./B06_Section_UI_Cross_Wall.js";
+import { buildRevetWallGeometry } from "./logic/B06_Section_Cross_Wall_Geom.js";
 import { revetWallSpec, REVET_FORMS } from "./logic/B06_Section_UI_Cross_Culvert_Const.js";
 const anchor = { offset: 5, elevation: 100 };
 const outline = (form, role, extra = {}) =>
@@ -54,6 +54,7 @@ def test_벽_외곽_한_벌_높이_입력_그대로_노면_멈춤(tmp_path: Path
             "node",
             str(TSC),
             str(B06 / "B06_Section_UI_Cross_Wall.ts"),
+            str(B06 / "logic" / "B06_Section_Cross_Wall_Geom.ts"),
             "--outDir",
             str(out),
             "--module",
@@ -95,8 +96,12 @@ 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 (
+        "B06_Section_UI_Cross_Culvert_Geom",
+        "B06_Section_UI_Cross_Culvert_Extra",
+        "logic/B06_Section_Cross_Revetment_Geom",
+    ):
+        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")