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近年来,上海、深圳等地先后建成几座钢结构高层建筑,还有一些钢结构高层建筑正在北京等地兴建。钢结构高层建筑究竟选用何种吊装机械进行施工为宜,已引起建筑工作者的兴趣。二次世界大战前,钢结构高层建筑主要集中在美国纽约等地,采用德立克(桅杆吊)进行吊装施工。进入60年以后,随着起重技术的进步,塔式起重机开始在钢结构高层建筑施工中得到应用和推广。目前,世界各地钢结构高层建筑用的塔式起重机按臂架结构型式区分有两种,一种是俯仰变幅
In recent years, several high-rise buildings with steel structures have been built in Shanghai and Shenzhen, and some high-rise buildings with steel structures are being built in Beijing and other places. It is advisable for the steel structure high-rise building to choose which type of lifting machinery to use for construction, which has aroused the interest of construction workers. Before the Second World War, high-rise steel structure buildings were mainly concentrated in New York and other places in the United States. They used Drake (mast crane) for lifting construction. After entering 60 years, with the progress of lifting technology, tower cranes have begun to be applied and promoted in the construction of steel structure high-rise buildings. At present, there are two types of tower cranes for steel high-rise buildings around the world that are distinguished by the type of boom structure. One is pitch pitching.