diff --git a/src/hooks/module/useTrestle.js b/src/hooks/module/useTrestle.js
index 4da85212..df3fa397 100644
--- a/src/hooks/module/useTrestle.js
+++ b/src/hooks/module/useTrestle.js
@@ -1556,7 +1556,7 @@ export const useTrestle = () => {
   //랙 없음 인 경우 지지금구 설치
   const installBracketWithOutRack = (surface, exposedBottomModules, leftExposedHalfBottomModules, rightExposedHalfBottomPoints, isChidory) => {
     let { rackQty, rackIntvlPct, moduleIntvlHor, moduleIntvlVer, lessSupFitQty, lessSupFitIntvlPct, moduleMaxRows } = surface.trestleDetail
-    const checkList = []
+    let checkList = []
 
     exposedBottomModules.forEach((module) => {
       checkList.push(module.leftRows, module.rightRows, module.centerRows)
@@ -1569,6 +1569,9 @@ export const useTrestle = () => {
     rightExposedHalfBottomPoints.forEach((module) => {
       checkList.push(module.leftRows, module.rightRows, module.centerRows)
     })
+
+    checkList = checkList.filter((item) => item !== undefined && item !== null)
+
     const isAllCheckMaxRows = checkList.every((item) => item <= moduleMaxRows)
 
     if (!isAllCheckMaxRows) {