桁

例句：

1. 1. The bridge is made of steel beams and girders.
   这座桥由钢梁和钢格构组成。
2. 2. The engineer used a steel trusses to support the building.
   工程师使用钢桁来支撑这座建筑。
3. 3. The structure was designed to withstand heavy loads, using steel trusses as its mainsupport.
   该结构设计用来承受重载，主要依靠钢桁作为其支撑。