... structure buildingWe can supply all kinds of steel structures, steel building, metal building, modular house, steel frame for warehouse, workshop, garage etc ... span, single floor, double floors!3.base:cement and steel foundation bolts4.column and beam:material Q345(S355JR)or Q235(S235JR ... wheel pressure and min wheel pressure! All the steel structure building are customized,pls feel free to contact us!