At 8:18 am, on November 11, the renovation project of the Shanghai International Gymnastics Center reached a critical milestone—the start of the integrated lifting of an ultra-large-span steel truss layer weighing 3,600 tons and spanning 84 meters. The truss was rising at a speed of approximately 3 meters per hour and was expected to reach its target position the next day.

The main truss layer of the overall renovation project of the Shanghai International Gymnastics Center is positioned 30.55 meters above ground, with a span of 84 meters, making it an ultra-large-span steel structure of exceptionally high technical difficulty. Faced with risks associated with height, precision requirements, and coordination challenges, the project team, after repeated deliberations, ultimately adopted the "in-situ ground assembly + integrated hydraulic lifting" construction method.

At the scene, the reporter observed dozens of staff closely monitoring animated simulations and data during the construction process, while hundreds of others were distributed across the construction site, fully advancing all aspects of the building work. The integrated lifting project is both a challenge and an achievement. On one hand, the hoisting is being conducted within the above-ground steel structure of the main gymnasium—a nearly 100-meter hemisphere composed of two independent systems: a hemispherical latticed shell structure and the main steel structure. This imposes extremely stringent requirements on the stability of the structural system during construction, the erection of temporary supports, and the precision control of closure. On the other hand, the method of ground assembly and synchronous lifting significantly reduces the risks of high-altitude work and greatly shortens the construction timeline.

Prior to this, the project completed tasks including the installation of heavy tower cranes, in-situ ground assembly of the steel trusses, application of fireproof coatings, installation of dampers, and the fitting of mechanical and electrical pipelines within the truss layer—all within just two months. These passed rigorous quality inspections and pre-lift condition assessments, with all trial lifting and debugging work completed on November 9.

Yao Yuan from the Changning District Sports Venue Management Center told the reporter that after the integrated lifting is completed, one day of structural stability monitoring is expected, followed by a two-week period of aerial welding. The entire main steel structure construction is projected to be finished by January 2026.