Common metals and their alloys, unwrought or semi-wrought; metal building materials, namely, ceiling panels, wall panels, exterior wall panels and cladding, roof panels, fascia, louvers and sun shades, baffles, grilles, railings, gates, door fittings, shading panels and housings for light fixtures, column coverings, beams, and door hardware in the nature of hinges, sliding door tracks, sliding door trolleys, handles and thresholds; transportable buildings of metal; materials of metal for rail...