floor girder

• 行车大梁,横梁

floor girder的用法和样例：

例句

1. Heavy timbers supported the floor above.
   粗大的横梁支撑着上面的楼面。
2. The cross girder center segments of the bents were field bolted.
   构架横梁的中间段在工地用螺栓连接。