Angle steel commonly known as Angle iron, is both sides mutually vertical angles of steel strip shape. Have equal sides angles and not equal sides Angle steel cent. The two sides Angle steel margins are equal. The specifications to edge × × Wide wide side edge thick millimeter several said. Such as "< 30 × 30 × 3, " meaning that margins for 30 mm thick, edge for 3 mm steel of equal sides. Also can use said model, model is the cm wide edge number, such as < # 3. Type, the same model that in the different side the size of the thick, thus in the contract and other documents Angle margins, will fill in the thick size is complete, avoid use alone model said. The specifications for hot rolling steel equilateral # 2-# 20. According to the different Angle structure of the stress of the different need component, also can be the fittings between components. Widely used in all kinds of architecture and engineering structure, such as the beam, Bridges, lose electrical tower, lifting transportation machinery, the ships, the industrial furnace, mto plant, container frame and warehouse shelves, etc.