... supply all kinds of steel structures, steel bulding, metal building, modular house, steel frame for warehouse,workshop, garage etc, steel beams, other riveting and ... pipe, etc 6) C or z purlin:Size from C120~C320, Z100~Z200 7) Roof and wall panel:Single colorfull corrugated steel sheet ... , max wheel pressure and min wheel pressure! large span prefabricated steel construction/light steel warehouse