According to foreign media reports, the roof of a large gymnasium in St. Petersburg collapsed during the reconstruction. Two workers under construction, one managed to escape into the lift, while the other fell dead.
Built in 1967, the St. Petersburg stadium covers an area of 10000 square meters and can accommodate 25000 spectators. It is the largest stadium in Europe. It has held many high-level world competitions such as international competitions and World Championships.The structural system is a double-layer suspension system of spoke type. The diameter of outer ring is 93m, and that of inner ring is 12m. 48 groups of cable trusses are arranged radially, with a height span ratio of 1 / 17, a bearing cable diameter of 63mm and a stable cable diameter of 42.5mm. The section of reinforced concrete outer ring is 2.8m * 0.62M, and the roof is 4mm thick ribbed steel sheet. Two circles of vertical steel plate supporting system are arranged along the ring direction and the corresponding position of vertical web member, which improves the overall performance of the structure and reduces its height. The steel consumption of roof is 99.3kg/m2.The stadium, which has been closed since August last year, was originally planned to be demolished and rebuilt for the 2023 Ice Hockey World Championships.
