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，在全国各地的“平改坡”项目中，普遍采用轻坡屋，由、或桁架及檩条成，通过浇筑混凝土卧将新增轻坡屋与原有混凝土连接。