diff --git a/src/hooks/module/useTrestle.js b/src/hooks/module/useTrestle.js
index fad9a810..411fc118 100644
--- a/src/hooks/module/useTrestle.js
+++ b/src/hooks/module/useTrestle.js
@@ -799,7 +799,7 @@ export const useTrestle = () => {
       const parent = canvas.getObjects().find((obj) => obj.id === surface.parentId)
       const { directionText, roofMaterial, moduleCompass, surfaceCompass } = parent
       const slope = Number(roofMaterial.pitch)
-      const angle = Number(roofMaterial.angle)
+      const angle = Number(roofMaterial.angle) || getDegreeByChon(slope)
       const roofMaterialIndex = parent.roofMaterial.index
       const { nameJp: roofMaterialIdMulti } = roofMaterial
       const moduleSelection = moduleSelectionData?.roofConstructions?.find((construction) => construction.roofIndex === roofMaterialIndex)
@@ -1123,7 +1123,7 @@ export const useTrestle = () => {
       return
     }
     const roof = canvas.getObjects().find((obj) => obj.id === surface.parentId)
-    const degree = getDegreeByChon(roof.roofMaterial.pitch)
+    const degree = Number(roof.roofMaterial.angle) || getDegreeByChon(roof.roofMaterial.pitch)
     rackIntvlPct = rackIntvlPct === 0 ? 1 : rackIntvlPct // 0인 경우 1로 변경
     rackIntvlPct = 100 / rackIntvlPct // 퍼센트로 변경
     const moduleLeft = lastX ?? left