diff --git a/src/main.ts b/src/main.ts
index a0ba70b..2455083 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -95,8 +95,9 @@ const PART_GROUPS: { label: string; pier: PartName[]; abut: string[] }[] = [
   { label: '말뚝', pier: ['piles'], abut: ['piles'] },
   { label: '버림', pier: ['blinding'], abut: [] },
   { label: '지반면', pier: ['ground'], abut: ['ground'] },
-  { label: '벽체·흉벽', pier: [], abut: ['wall', 'parapet', 'haunches'] },
-  { label: '날개벽', pier: [], abut: ['wings'] },
+  { label: '벽체·흉벽', pier: [], abut: ['wall', 'parapet'] },
+  // 헌치 sits at the wing ends (wings.ts builds it per wing), so it follows the 날개벽 toggle (2026-11-03).
+  { label: '날개벽', pier: [], abut: ['wings', 'haunches'] },
   { label: '접속슬래브', pier: [], abut: ['slab'] },
 ];