... widely used in the purlin and wall beam of steel structure building, c purlin is can be combined to make lightweight roof ... H-Beam, C-Beam, Galvanized Steel Coil, Hot Rolled Steel Plate, Cold Rolled Steel Plate, Mild Steel Plate, Structure Steel, difference ... cooperate and build long-term partnership! Company NameTianjin Shangyi Metal Structure Trade Co. LtdAddressA1905 of Future Plaza, No 103, Weidi ...