metal in the form of sheets, coils, strips, plates, bars, blooms, billets, rods and ingots; metal building materials, namely, metal roof and wall cladding, metal roof and floor decking, purlins, metal guttering and downpipes, rainwater tanks, parts of common metal for all the aforesaid; transportable buildings of metal; materials for railway tracks, namely, tracks, rails, spikes, sleepers and ties; non-electric cables and wires of common metal; metal fencing and metal fencing materials, namely, gates, panels and posts; pipes and tubes of metal; ores of metal