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，全国各地的“平改坡”项目中，普遍采用轻钢结构坡屋，由钢柱、钢或钢桁架及钢檩条构成，通过浇筑混凝将新增轻钢坡屋与原有混凝结构连接。