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，普遍采结构坡屋，由柱、桁架及檩条构成，通过浇筑混凝土卧将新增坡屋与原有混凝土结构连接。