Architectural metalwork; Brackets of metal for building; Brackets of metal for furniture; Buckles of common metal; Building curtain walls made primarily of metal; Buildings, transportable, of metal; Casement windows of metal; Casements of metal; Cast iron, unwrought or semi-wrought; Cast steel; Casting alloys; Common metals and their alloys including stainless steel; Common metals and their alloys, unwrought or semi-wrought; Construction elements made of metal, namely, fabricated metal compon...