... Steel: Column and beam(H-section), square steel tube,C/Z purlinConection Method: Welding or hot rolled or cold rolledWall ... house, prefabricated home,sandwich panel, welded H steel,C/Z channel,corrugated steel sheet,etc.*Products&Service Scope:Design&Engineering ... elements(built-up welded H-section , hot-rolled H-section, channel, steel column, steel beam),standard frames, secondary framing, roof & ...