... cold-formed form hot rolled coil. Advantage: a.) C channel has thin wall, light weight, cross ... Self-assembled into lightweight roof, carrier construction, etc;c.) Mechanical light manufacturing in the column, beam and ... Shangyi Metal Structure Trade Co. Ltd is a leading export company base in Tianjin, which ... a large rang of various assortment of steel products such as: I-Beam, Channel, Angle, H-Beam, C ...