diff --git a/src/components/floor-plan/modal/basic/step/Trestle.jsx b/src/components/floor-plan/modal/basic/step/Trestle.jsx
index 1ce09bf1..e2e7bb78 100644
--- a/src/components/floor-plan/modal/basic/step/Trestle.jsx
+++ b/src/components/floor-plan/modal/basic/step/Trestle.jsx
@@ -176,6 +176,13 @@ const Trestle = forwardRef((props, ref) => {
 
   const onChangeHajebichi = (e) => {
     setHajebichi(e)
+
+    // roofs 배열에서 selectedRoof.index와 같은 인덱스의 지붕 객체 업데이트
+    if (selectedRoof && selectedRoof.index !== undefined) {
+      const updatedRoofs = roofs.map((roof, index) => (index === selectedRoof.index ? { ...roof, hajebichi: Number(e) } : roof))
+      setRoofs(updatedRoofs)
+    }
+
     dispatch({
       type: 'SET_HAJEBICHI',
       roof: {
diff --git a/src/hooks/module/useTrestle.js b/src/hooks/module/useTrestle.js
index df3fa397..ec9e03d0 100644
--- a/src/hooks/module/useTrestle.js
+++ b/src/hooks/module/useTrestle.js
@@ -2544,7 +2544,7 @@ export const useTrestle = () => {
       mixMatlNo: module.mixMatlNo,
       raftBaseCd: addRoof.raft ?? addRoof.raftBaseCd,
       inclCd: addRoof.pitch,
-      roofPitch: !addRoof.roofPchBase ? addRoof.roofPchBase : Number(addRoof.roofPchBase),
+      roofPitch: !!addRoof.hajebichi ? addRoof.hajebichi : Number(addRoof.roofPchBase),
       exposedLowerBottomTotCnt: result.exposedBottom, // 노출 최하면 갯수
       exposedHalfBottomTotCnt: result.exposedHalfBottom, // 노출 반하면 갯수
       exposedTopTotCnt: result.exposedTop, // 노출 상면 총 수