1:Parameters for Structural Galvanized C Metal Purlins C Sections Product NameC Purlins/C Sections/C Channels/C-shaped SteelCapacity100000 pcs/monthCertificateISO9001~14001MaterialQ235/Q235B/Q345/Q345B/SS400TypeChannel SteelSurface treatmentPolish;Painted;Galvanzied;PunchedPaymentL/C at sight...