diff --git a/B07_DesignDetail/B07_DesignDetail_Router.py b/B07_DesignDetail/B07_DesignDetail_Router.py
index 7ffc5ceb4..26d1cd72a 100644
--- a/B07_DesignDetail/B07_DesignDetail_Router.py
+++ b/B07_DesignDetail/B07_DesignDetail_Router.py
@@ -52,6 +52,7 @@ from B07_DesignDetail.B07_DesignDetail_Router_Support import (
 )
 from B07_DesignDetail.B07_DesignDetail_Router_Support_Overlay import cross_overlay_extents
 from B07_DesignDetail.B07_DesignDetail_Router_Support_Plan import PLAN_KIND_ID, plan_kind_source
+from B07_DesignDetail.B07_DesignDetail_Router_Support_Structure import STRUCTURE_FRAME_LAYER
 from B07_DesignDetail.B07_DesignDetail_Schema import (
     DesignDrawingConfirmRequest,
     DesignDrawingConfirmResponse,
@@ -140,7 +141,9 @@ def _asset_data_url(relative_path: str | None) -> str:
 
 def _drawing_guide(drawing: dict[str, Any]) -> dict[str, Any] | None:
     """CAD 가이드(169-1 · 169-2) — 작도 영역(도면 좌표) + 넘친 칸. 도각이 없으면 None."""
-    area = frame_guide_area(drawing.get("entities") or [])
+    entities = drawing.get("entities") or []
+    # 구조물 도면(376) = M02 얹는 도각 층
+    area = frame_guide_area(entities) or frame_guide_area(entities, STRUCTURE_FRAME_LAYER)
     return {"area": area, "marks": drawing.get("overflow_cells") or []} if area else None
 
 
diff --git a/B07_DesignDetail/B07_DesignDetail_Router_Support_Structure.py b/B07_DesignDetail/B07_DesignDetail_Router_Support_Structure.py
index df1146ca7..549d036c0 100644
--- a/B07_DesignDetail/B07_DesignDetail_Router_Support_Structure.py
+++ b/B07_DesignDetail/B07_DesignDetail_Router_Support_Structure.py
@@ -20,6 +20,8 @@ from M02_MasterTemplete.M02_Item_Source import read_json
 logger = logging.getLogger(__name__)
 
 STRUCTURE_PREFIX = "structure_"
+# M02 `structure_frame` 도각 층 — 그 모듈은 B07 라우터를 불러 여기서 못 부름(같은 값 유지)
+STRUCTURE_FRAME_LAYER = "m02-structure-frame"
 _SHEET_ID = re.compile(r"^[A-Za-z0-9-]{1,40}$")
 
 
diff --git a/resources/tester/test_376_b07_structure_drawings.py b/resources/tester/test_376_b07_structure_drawings.py
index 081d8a467..d67260768 100644
--- a/resources/tester/test_376_b07_structure_drawings.py
+++ b/resources/tester/test_376_b07_structure_drawings.py
@@ -11,7 +11,9 @@ from pathlib import Path
 
 import pytest
 
+from B07_DesignDetail import B07_DesignDetail_Router as router
 from B07_DesignDetail import B07_DesignDetail_Router_Support as support
+from B07_DesignDetail import B07_DesignDetail_Router_Support_Structure as structure
 from B07_DesignDetail.B07_DesignDetail_Engine_Cad import DRAWING_FORMAT
 from B07_DesignDetail.B07_DesignDetail_Engine_Template import (
     use_project_templates,
@@ -114,6 +116,13 @@ def test_단건_도각_도번_도면명(project: Path) -> None:
     assert "관보호공 조합 · 상세" in texts  # 도면명
     assert "SD-000002-2" in texts  # 장 도번
     assert any(layer.get("id") == "m02-structure-frame" for layer in drawing["layers"])
+    assert router._drawing_guide(drawing)["area"]  # CAD 가이드 선 — 얹는 도각 층에서
+
+
+def test_도각_층_이름_M02_와_같음() -> None:
+    from M02_MasterTemplete.M02_MasterTemplete_Router_Drawing import STRUCTURE_FRAME_LAYER
+
+    assert STRUCTURE_FRAME_LAYER == structure.STRUCTURE_FRAME_LAYER
 
 
 def test_없는_구조물_도면은_404(project: Path) -> None: