Common metals and their alloys; goods of common metals not included in other classes; steel sheets; steel pipes; building boards of metal; stop collars of metal; stops of metal; strap hinges of metal; brackets of metal for buildings; framework of metal for buildings; reinforcing materials of metal for buildings; fittings of metal for buildings; buildings of metal; hardware of metal; joists of metal; linings of metal; nuts of metal; pillars, poles and posts of metal; props of metal; tubes and pipes of metal including sheet pipes; sheets and plates of metal; and trellis of metal