The steel truss of Zone 1 at Zhaotong East Railway Station in Yunnan, a project participated by the company, has successfully completed the integral lifting. The steel truss, with a total weight of over 500 tons, achieved precise closure within 6 hours and 20 minutes, marking a phased achievement in the project construction and laying a solid foundation for subsequent construction works.
The roof truss of Zhaotong East Railway Station adopts a primary-secondary three-dimensional truss structure. The roof truss spans 171 meters in width for the side-platform section and 114 meters for the elevated waiting hall section, with a total length of 143.95 meters and a top elevation of 29.7 meters. The steel structure weighs 2,400 tons, with a maximum span of 63 meters and a maximum cantilever length of 16.5 meters, and the total length of welds reaches 23,000 meters. For structural stability enhancement, horizontal braces are arranged around the roof and at support positions; the main structural columns along Axis A and on both sides, as well as the W-shaped truss columns outside Axis A, form a robust load-bearing system. The connection between the roof and the lower main structure adopts finished anti-seismic spherical hinge supports, and the roof enclosure structure is a metal roof supported by steel purlins.
What is a Steel Truss?
A steel truss is a high-performance structural system composed of straight steel members (typically pipes, angles, channels, or I-sections) connected at joints (welded or bolted) to form triangular or polygonal units. Characterized by its lightweight, high load-bearing capacity, and structural stability, it is widely recognized as a core load-bearing component in large-span infrastructure and building projects. The triangular unit design distributes forces evenly across all members, enabling efficient transfer of axial tension and compression while minimizing bending stress-making it an ideal choice for spanning long distances with minimal material usage.
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