diff --git a/src/hooks/module/useTrestle.js b/src/hooks/module/useTrestle.js
index 7048e64e..32eef2a2 100644
--- a/src/hooks/module/useTrestle.js
+++ b/src/hooks/module/useTrestle.js
@@ -2251,7 +2251,15 @@ export const useTrestle = () => {
       let halfMaxX
       let halfMaxY
       const { direction, trestleDetail } = surface
-      const { moduleIntvlHor, moduleIntvlVer } = trestleDetail
+      let moduleIntvlHor, moduleIntvlVer
+      if (+roofSizeSet === 3) {
+        //육지붕의 경우 값 고정
+        moduleIntvlHor = 300
+        moduleIntvlVer = 100
+      } else {
+        moduleIntvlHor = trestleDetail.moduleIntvlHor
+        moduleIntvlVer = trestleDetail.moduleIntvlVer
+      }
 
       if (direction === 'south' || direction === 'north') {
         maxX = width + moduleIntvlHor / 10