This paper introduces the actual operating course of the truss hoisting with herringbone rotating longeron supported by concrete frame.

介绍了利架支撑人字转动桅杆吊装桁架的实际操作过程。

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，普遍采轻结构坡屋顶，由柱、梁或桁架及檩条构成，通过浇筑混凝土卧梁将新增轻坡屋顶与原有混凝土结构连接。