Angle steel is commonly known as Angle, it is the long shape steel that both sides each other into vertical angle. Divided into equal Angle and unequal Angle. According to the stress of the structure of the different needs, angles can make into various components, also can make members between the joints. Widely used in various building structure and engineering structure, such as the beam, Bridges, transmission tower, lifting transportation machinery, ship, industrial furnace, reaction tower, container frame and warehouse.