... heavy Commodityprefab steel structure SpecificationsStandard ISO 9001 : 2008 , GB ,AISI , ASTM , BS, JIS ,CE (DIN18800)Material & Grade ... Using workshop, steel walkway and floor , steel structure platform ,steel fabricated house ,frame part ,steel structure bridge, warehouse Surface galvanized , ... Quick installation ,easy disassembly and moving ,light for transportation3, High-strength ,heat and sound ...