6 PREFABRICATED BUILDINGS OF METAL; BUILDING MATERIALS OF METAL, NAMELY, SOFTITS, COMPOSITE PANELS, BUILDING BOARDS, NON-ELECTRIC CABLES, DUCTS FOR CENTRAL HEATING INSTALLATIONS AND FOR VENTILATING AND AIR-CONDITIONING INSTALLATIONS, DOOR FRAMES, FRAMEWORK FOR BUILDING, GIRDERS, HINGES, JOISTS, LATHS, LATTICEWORK, LININGS, PARTITIONS, PIPEWORK, REINFORCING MATERIALS FOR BUILDING, FOR CONCRETE AND FOR PIPES, ROOFS COVERINGS, SCAFFOLDING, SHEETS AND PLATES, SHUTTERS, TUBES, WAINSCOTING, WATER PIPES,WINDOW FRAMES; FITTINGS OF METAL FOR FURNITURE, NAMELY, CONNECTING BOLTS, HINGES, NAILS, FITTINGS FOR BEDS, FURNITURE CASTERS, HOOKS, KNOBS, NUTS, PEGS, RINGS, RIVETS, SCREWS, STOPS