steel upright

例句：

1. 1. The bridge is made of steel uprights to withstand heavy loads.
   这座桥是用钢直梁建造的，以承受重载。
2. 2. The engineer used steel uprights to reinforce the structure.
   工程师使用了钢直梁来加固结构。
3. 3.The construction site was surrounded by steel uprights to ensure safety.
   施工现场被钢直梁环绕，以确保安全。