English Dictionary

box girder

noun

A steel beam with a hollow rectangular cross section; used for constructing bridges etc.

The construction crew used a box girder to support the bridge.

意味（1）

A steel beam with a hollow rectangular cross section; used for constructing bridges etc.

An all-welded, box section underframe, incorporating box girders which run the full length of the locomotive, is welded to stress-bearing bodysides with partition walls forming reinforcing cross members.