... structural steel and alloy structural steelSpecial purpose steelSpecifications:Main Steel: Column and beam(H-section), square steel tube, ... C/Z purlinConection Method: Welding or hot rolled or cold rolledWall&Roof: EPS,Rockwool,PU sandwichpanel, Corrugated steel ... H-section , hot-rolled H-section, channel, steel column, steel beam),standard frames, secondary framing, roof & wall ...