... (G3133-87)Function:Beam, column used as various steel structure beam and column on workshop, warehouse, office building ... simple tools: plugs and screw.4. Firm structure: the warehouse adopts steel frame structure and sandwich panels.5. Waterproof: Our ... to be the Carrefour in supplying the steel structure plant,Steel structure prefabricated building, steel warehouse, prefabricated house, mobile ...