diff --git a/resources/views/rd/fire-shutter-drawing/index.blade.php b/resources/views/rd/fire-shutter-drawing/index.blade.php
index eae6b705..77ec83fb 100644
--- a/resources/views/rd/fire-shutter-drawing/index.blade.php
+++ b/resources/views/rd/fire-shutter-drawing/index.blade.php
@@ -1136,7 +1136,7 @@ function renderGrCross() {
             // 시작/끝: (0,60), Seg1·Seg15(10←) 립 겹침
             // ══════════════════════════════════════════
             {
-                const ox2 = bx; // ② 좌측벽 = ① body 시작 = bx
+                const ox2 = w4x + w4depth + (10 + 0.75) * sc; // ② 좌측벽 = ④ 끝 + 10mm + 0.75(반두께)
                 const oy2 = by; // ② 상단
                 const c = cBody, s = '#94a3b8';
                 // 프로파일 좌표 → SVG 좌표 변환