diff --git a/src/components/floor-plan/modal/lineTypes/DoublePitch.jsx b/src/components/floor-plan/modal/lineTypes/DoublePitch.jsx
index 12ed66be..4919462b 100644
--- a/src/components/floor-plan/modal/lineTypes/DoublePitch.jsx
+++ b/src/components/floor-plan/modal/lineTypes/DoublePitch.jsx
@@ -26,17 +26,15 @@ export default function DoublePitch({ props }) {
     arrow2Ref,
   } = props
 
-  const getLength2 = () => {
-    const angle1Value = angle1Ref.current.value
-    const angle2Value = angle2Ref.current.value
-    const length1Value = length1Ref.current.value
+  const getLength2 = (angle1, angle2, length1) => {
+    const angle1Value = angle1 !== undefined ? angle1 : angle1Ref.current?.value
+    const angle2Value = angle2 !== undefined ? angle2 : angle2Ref.current?.value
+    const length1Value = length1 !== undefined ? length1 : length1Ref.current?.value
 
     const arrow1Value = arrow1Ref.current
-    const arrow2Value = arrow2Ref.current
 
-    if (angle1Value !== 0 && length1Value !== 0 && angle2Value !== 0 && arrow1Value !== '') {
+    if (!isNaN(Number(angle1Value)) && !isNaN(Number(length1Value)) && !isNaN(Number(angle2Value)) && arrow1Value) {
       const radian1 = (getDegreeByChon(angle1Value) * Math.PI) / 180
-
       const radian2 = (getDegreeByChon(angle2Value) * Math.PI) / 180
       return Math.floor((Math.tan(radian1) * length1Value) / Math.tan(radian2))
     }
@@ -178,7 +176,7 @@ export default function DoublePitch({ props }) {
                 ref={angle2Ref}
                 onChange={(value) => {
                   setAngle2(value)
-                  setLength2(getLength2())
+                  setLength2(getLength2(angle1Ref.current?.value, value, length1Ref.current?.value))
                 }}
                 placeholder="45"
                 onFocus={() => (angle2Ref.current.value = '')}