Brackets of metal for building; Common metals, unwrought or semi-wrought; Construction elements made of metal, namely, supports; Fences of metal; Frames of metal for building; Framework of metal for building; Guard rails of metal; Metal hardware, namely, nuts; Metal hardware, namely, springs; Pipework of metal; Poles of metal; Scaffolding of metal; Steel; Steel pipes; Steel sheets; Trellis of metal