The raw material shed of Anyang Iron & Steel Group in Andaping has a total investment of CNY 170 million and consists of four parts. They are namely coke freight yard A, ore powder yard B, mixing and flat yard C, and 13 coal yard Powder field D. Among them, the span of B is 145 meters, which is currently the largest raw material shed in China. The D has a span of 113 meters, a height of 52 meters and a width of 48 meters. Although the width is the shortest of the 4, due to the narrow width an additional layer of grid structure is addedto enhance the wind resistance.
The weight of the three-layer steel structure is heavy, and thesteel structure components reaches more than 130 tons. It is very difficult to complete the 113-meter-span docking. In order to complete the arching work, Anyang Iron and Steel coordinated six cranes to the site. The largest one has a lifting weight of 360 tons.