span of roof truss

例句：

1. 1.The engineer calculated the span of the roof trusses to determine the load-bearing capacity.
   工程师计算了屋顶桁架的跨度，以确定承载能力。
2. 2. The span of the roof trusses is crucial for the stability of the building.
   屋顶桁架的跨度对于建筑的稳定性至关重要。
3. 3. The span of the roof trusses was measured to ensure compliance with building codes.
   测量屋顶桁架的跨度以确保符合建筑规范。