Such trusses are called simple trusses.

这样的桁架称为简单桁架。

The trusses are supported by 20 RC columns around the Gymnasium.

桁架结构支承在周边20根钢筋混凝土柱上。

The original roof trusses on the wall outside the cloister support.

原来屋架全靠墙外回廊上的木柱支撑。

Trusses showed no major defects or damage at the time of inspection.

桁架表明在检查时没有重大缺陷或损坏。

So, trusses are strong, efficient, and made from renewable resources.

因此，桁架强度好，效率高，而且来自再生资源。