Metal building materials; small items of metal hardware; goods of common metal not included in other classes; metallic rails; tracks (rails) of metal; sliding rails of metal; posts, braces, brackets, structural building members and support members, both of metal; beams of metal; trolley systems, rollover units, hoists, track hardware of metal; nuts, bolts, fasteners, clips, guides; parts and fittings in this class for use in relation to the foregoing; all of the foregoing made from metal