SPECIALLY PREPARED FERROUS METAL PRODUCTS, NOT CAPABLE OF GENERAL USE-NAMELY, SHEETS, STRIP, COMMERCIAL COILS, PLATES, COMMERCIAL SHAPES, RODS, WIRE AND COMMERCIAL FABRICATED PARTS, FOR USE IN BUILDING, TRANSPORTATION AND DRAINAGE CONSTRUCTION AND PARTICULARLY FOR USE IN THE ASSEMBLY OF TRAILER BODY SIDES AND ROOFS, PULLMAN CARS, FREIGHT CARS, HOPPER CARS, AIRCRAFT PARTS, AIRCRAFT FIRE WALLS, EXHAUST DUCTS, CARBURETOR RINGS, MARINE HULLS AND HARDWARE, STRAIGHT SEAM PIPE, SPIRAL PIPE, CULVERTS, REINFORCEMENTS FOR CONCRETE WALLS, TUNNEL LINERS, ARCHES FOR DRAINAGE CONDUITS, TANKS FOR CHEMICAL STORAGE REFINING AND OIL PROCESSING CONTAINERS, DECK PLATES, BOILERS, LIQUID AND PRESSURE VESSELS, BRIDGE DECKING, FARM FENCES, REINFORCING BARS AND LIGHT WIRE FOR CONCRETE FORMS