... column/beamBoltanchor,ordinary,high strenght boltRoof &Wallsandwich panel or steel plateSandwich panel materialsEPS, polyurethane, rock wool, glass woolWindowPVC ... Structure,Space Frame,Prefabricated House,Steel TowerProduction Lines9 production lines of light steel,heavy steel,space frame and tube truss. ... Process4. Metal Construction Catalogue 5. Certificate Big Large Span Metal Construction