diff --git a/resources/views/rd/fire-shutter-drawing/index.blade.php b/resources/views/rd/fire-shutter-drawing/index.blade.php
index f4bf469a..c9a978da 100644
--- a/resources/views/rd/fire-shutter-drawing/index.blade.php
+++ b/resources/views/rd/fire-shutter-drawing/index.blade.php
@@ -1500,24 +1500,25 @@ function fs3dBuild() {
         const wallMat = new THREE.MeshStandardMaterial({ color: wallColor, transparent: true, opacity: wl.opacity / 100, side: THREE.DoubleSide });
         meshes.wall = new THREE.Group();
 
-        // 좌/우 기둥 (하나의 통 박스)
+        // 좌/우 기둥 (바닥~셔터박스 윗면까지, 인방과 겹치지 않게)
+        const colH = H + b.height; // 기둥 높이: 인방 아래까지
         if (wl.wing > 0) {
-            const colGeo = new THREE.BoxGeometry(wl.wing, wallH, wl.thick);
+            const colGeo = new THREE.BoxGeometry(wl.wing, colH, wl.thick);
             const leftCol = new THREE.Mesh(colGeo, wallMat);
-            leftCol.position.set(-W1 / 2 - wl.wing / 2, wallH / 2, 0);
+            leftCol.position.set(-W1 / 2 - wl.wing / 2, colH / 2, 0);
             meshes.wall.add(leftCol);
 
             const rightCol = new THREE.Mesh(colGeo.clone(), wallMat);
-            rightCol.position.set(W1 / 2 + wl.wing / 2, wallH / 2, 0);
+            rightCol.position.set(W1 / 2 + wl.wing / 2, colH / 2, 0);
             meshes.wall.add(rightCol);
         }
 
-        // 상부 인방 (셔터박스 윗면부터 위로만)
+        // 상부 인방 (셔터박스 윗면~topMargin, 기둥 포함 전체 폭)
         if (wl.topMargin > 0) {
             const totalW = W1 + wl.wing * 2;
             const lintelGeo = new THREE.BoxGeometry(totalW, wl.topMargin, wl.thick);
             const lintel = new THREE.Mesh(lintelGeo, wallMat);
-            lintel.position.set(0, H + b.height + wl.topMargin / 2, 0);
+            lintel.position.set(0, colH + wl.topMargin / 2, 0);
             meshes.wall.add(lintel);
         }