Common metals and their alloys, namely, steel in sheet, bar, rod or billet form; metal building materials, namely, doors, wall and roofing panels, window frames; transportable buildings of metal, namely, portable and pre-fabricated buildings; materials of metal for railway tracks, namely, rails, railroad ties; non-electric cables and wires of common metal, namely, wire fencing; ironmongery, small items of metal hardware, namely, door stops, door handles, screws, bolts; pipes and tubes of meta...