Abstract：
In Zhongnan Huiquan International Plaza project, steel tower base on the roof has an elevation of 209.300 m, steel tower top 248.800 m and antennae 277.974 m. Huge difficulties are encountered in aerial installation of the steel tower. The steel tower is divided into three structural systems, including H-steel frame, H-steel truss and pipe tower frame, and they are classified into A, B and C three structural levels, among which load is transferred. Therefore, installation of the steel tower on building roof is completed successfully.
