This project is a round steel pipe space truss on the roof of the natatorium, with a maximum span of 57m, intersecting welded joints, inverted triangular section, and spherical steel bearings for buildings. The wind pressure of the project site is relatively high. Through calculation and analysis, the structural safety of the project is controlled by stability, and Q235B steel is selected. This set of drawings is detailed, detailed, and designed according to the latest specifications. The drawings are rigorous and excellent, which is a big design