joist steel

例句：

1. 1. The engineer used joist steel to reinforce the building's structure.
   工程师使用梁钢加固了建筑物的结构。
2. 2.The construction site was equipped with high-quality joist steel for safety reasons.
   出于安全原因，施工现场配备了高质量的梁钢。
3. 3.The new bridge uses joist steel to ensure its durability and strength.
   这座新桥使用了梁钢来确保其耐用性和强度。