... bulding, metal building, modular house, steel frame for warehouse,workshop, garage etc, steel beams, other riveting and welding ... Type:Single slope, double slope, muti slope; Single span, double span, Multi-span, single floor, double floors! 3) Base:Cement ... ) ,Crane span, crane lift height, max lift capacity, max wheel pressure and min wheel pressure! large span prefabricated light steel warehouse