trussed steel joist

例句：

1. 1. The engineer designed the bridge to be structurally sound and safe for trussed steel joists.
   工程师设计了这座桥，使其结构稳固且安全，适用于桁架式钢梁。
2. 2.The construction crew used a special form of steel to create the trussed steel joists that support the roof.
   施工队使用了一种特殊的钢材来制作支撑屋顶的桁架式钢梁。
3. 3. The architect was tasked with designing the new office building's interior, which included trussed steeljoists for added strength and durability.
   建筑师被委派负责设计新办公楼的内部，其中包括用于增强强度和耐用性的桁架式钢梁。