diff --git a/src/modules/rack/Rack3dObject.ts b/src/modules/rack/Rack3dObject.ts
index 7dece62..56f1086 100644
--- a/src/modules/rack/Rack3dObject.ts
+++ b/src/modules/rack/Rack3dObject.ts
@@ -296,6 +296,9 @@ export default class Rack3dObject extends THREE.Object3D {
     const heights = []
     for (let i = 0; i < item.dt.bays.length; i++) {
       const bay = item.dt.bays[i]
+      if (bay.topHeight == null || bay.topHeight < 0) {
+        bay.topHeight = 0.5
+      }
       const bayHeight = bay.levelHeight[bay.levelHeight.length - 1] + bay.topHeight
       heights.push(bayHeight)
     }
@@ -358,8 +361,8 @@ export default class Rack3dObject extends THREE.Object3D {
     for (let i = 0; i < item.dt.bays.length; i++) {
       const bay = item.dt.bays[i]
       for (let j = 0; j < bay.levelHeight.length; j++) {
-        const levelHeight = bay.levelHeight[j]
-        if (levelHeight <= 0.005) {
+        const levelHeight = bay.levelHeight[j] - 0.05 // 0.05为横梁自身高度的一半
+        if (levelHeight <= 0.0) {
           continue
         }
         hBarMatrix.push({