diff --git a/src/hooks/roofcover/useRoofShapeSetting.js b/src/hooks/roofcover/useRoofShapeSetting.js
index 69309248..e317ba07 100644
--- a/src/hooks/roofcover/useRoofShapeSetting.js
+++ b/src/hooks/roofcover/useRoofShapeSetting.js
@@ -185,9 +185,19 @@ export function useRoofShapeSetting(id) {
       }
       case 4: {
         outerLines = canvas.getObjects().filter((obj) => obj.name === 'outerLine')
-        outerLines.forEach((line) => {
-          // hideLine(line)
-        })
+        const pitch = outerLines.find((line) => line.attributes.type === LINE_TYPE.WALLLINE.SHED)?.attributes.pitch
+        // 한쪽흐름일 경우 한쪽흐름의 pitch로 설정
+        if (pitch) {
+          outerLines.forEach((line) => {
+            if (line.attributes.type === LINE_TYPE.WALLLINE.EAVES) {
+              line.attributes = {
+                ...line.attributes,
+                pitch: pitch,
+              }
+            }
+          })
+        }
+
         break
       }