The Rongfa Building project is the tallest building under construction in the West Coast New Area of Qingdao and also a key project for urban renewal and construction in Qingdao. Its steel structure project has the following characteristics:

Application parts of steel structure: The outer frame columns of the project adopt rigid steel-concrete columns. This structure has a concrete outer layer and a steel core, which can shorten the construction period, improve structural stability, enhance the overall load-bearing capacity and seismic performance of the building, and is suitable for super high-rise buildings.

The difficulty in steel structure construction: A total of 448 steel structure columns are needed for the two towers, among which the longest is 6.52 meters and the heaviest weighs 9 tons. Moreover, the surrounding high-rise buildings are close to each other, and each tower can only be equipped with one tower crane. The vertical transportation capacity has become a key factor restricting the construction, making the steel structure hoisting construction and quality control very difficult.