... " (GB50205-2001)"Technical Specification for welded steel structure" (JGJ81-2002, J218-2002)"Technical Specification for Steel Structures of Tall Buildings" ... chicken shed,container house, prefabricated home,sandwich panel, welded H steel,C/Z channel,corrugated steel sheet, ... Cabins, Tubular Steel Structures,basic building elements(built-up welded H-section , hot-rolled H-section, channel, steel ...