... Easy to assemble and dismantle. *Easy to maintain. Steel structure products Description*Certificate: ISO 9001:2008,CE*Material: ... all kinds of steel structures, steel building, metal building, modular house, steel frame for warehouse, workshop, garage etc, steel beams, other riveting ... span, single floor, double floors!3) Base: Cement and steel foundation bolts4) Column and beam: Material Q345(S355JR ...