... kinds of steel structures, steel bulding, metal building, modular house, steel frame for warehouse,workshop, garage etc, steel beams, other ... span, double span, Multi-span, single floor, double floors! 3) Base:Cement and steel foundation bolts 4) ... made from angle, round pipe, etc 6) C or z purlin:Size from C120~C320, ... wheel pressure! large span prefabricated steel construction/light steel warehouse