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、墙型钢板与框架、檩条进行可靠连接而共同工作结系。

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.

目前，在全国各地“平改”项目中，普遍采用轻钢结顶，由钢柱、钢梁或钢桁架及钢檩条成，通过浇筑混凝土卧梁将新增轻钢顶与原有混凝土结连接。