Common metals and their alloys; metal building materials, namely, shores, supports, braces, metal bars for construction, beams, joists, building wall framings composed primarily of metal, metal roof trusses, composite panels composed primarily of metal, swage blocks; transportable buildings of metal; prefabricated buildings of metal; structures of metal for mechanically stabilising earth; earth retaining structures of metal; supporting walls of metal; reinforcing materials of metal for the co...