Channel steel is a long strip of steel with a channel section, which belongs to carbon structural steel for construction and machinery. It is a section steel with complex cross-section, and the cross-section shape is trough. Carbon steel channel steel is widely used in purlins and wall beams of steel structure buildings, and can also be combined into light roofs, brackets and other structures. In addition, it can also be used for mechanical columns, manufacturing beams and arms, etc.