Nowadays, slop roof consists of steel column and beam or steel truss and purling, and connected with existed building by concrete beam cast in place, is being used commonly in this project.

前，在全国各地的“平改坡”，普遍采用轻钢构坡屋顶，由钢柱、钢梁或钢桁架及钢檩构成，通过浇筑混卧梁将新增轻钢坡屋顶与原有混构连接。

The stressed skin diaphragm is a structural system that considers profiled sheet of roof and metope working together with framework and purline.

受力蒙皮是考虑房屋屋面、墙面的压型钢板与框架、檩进行可靠连接而共同工作的构体系。