Steel I beam steel is a new type of economic construction steel. Economic and reasonable h-beam section shape, good mechanical performance, rolling section on each extension point is relatively uniform, small internal stress, compared with ordinary beams, with large section modulus, light weight, save metals etc.. mainly used for large buildings that big cutting ability, good cross section stability (such as factories, high-rise building, etc.), and Bridges, ships, lifting transportation machinery, equipment foundation, support, foundation pile, etc.