6 STRUCTURED BRIDGES AND BRIDGES AND BRIDGE PARTS OF METAL WITH SUPPORTING STEEL FRAMEWORKS; COMMON RAW AND SEMIWROUGHT METALS AND THEIR ALLOYS; CAST, LAMINATED OR PROFILED BUILDING MATERIALS-NAMELY, HEAVY GIRDERS, BEAMS, PILE PLANKS, HOT-ROLLED BARS AND CONCRETE METALLIC REINFORCEMENTS; SHEET METALS, HOT-ROLLED AND COLD-ROLLED METAL FOIL, COATED METAL FOIL AND CABLES; COATED AND UNCOATED METALLIC GRATINGS; METALLIC PIPES, CHAINS, RAILS, RAILWAY SHUNTS, POINTS, SIDINGS AND COUPLINGS; FORGED METALS; HARDWARE OF METAL-NAMELY, NAILS, NUTS, BOLTS, SCREWS, PLUGS, FASTENERS AND RODS; COMMERCIAL WIRE, INDUSTRIAL WIRE, UPHOLSTERY SPRING WIRE, WIRE FOR ROPES, PRESTRESSED CONCRETE WIRE AND STRAND, MECHANICAL SPRING STEEL WIRE, HIGH-CARBON WIRE, STAINLESS STEEL WIRE, FENCING WIRE, BARBED WIRE AND WELDED WIRE MESH