B.I. and G.I. Square Tube

Square Tube is a versatile structural material that is able to withstand extreme temperature and pressure. It is commonly used as steel frames for gate construction, door jambs, grills, walls, rafters, floor joists, and studs for walls.

It is available in 2 variants – black iron (B.I.) and galvanized iron (G.I.). Galvanized Iron is covered with zinc to make steel resistant to rust. Black Iron is uncoated and the black color is from the iron oxide made on its surface throughout the manufacturing process.