... below: (1) Simple Steel Structure Warehouse Main structureSingle span shorter than 18m, lower than 6m Maintenance systemRoof Colored ... Coastal (high wind speed) Steel Structure Warehouse Main structureSingle span shorter than 18m, lower than 6m Maintenance system Roof ... by the customers. It is mainly used for large-span structures, workshops, warehouses, office buildings, large supermarkets, logistics ...