Alloyed iron; Alloyed steels; Alloys of common metal; Aluminum alloys; Buckles of common metal; Building materials, namely composite panels composed primarily of metal; Casings of metal; Construction elements made of metal, namely, supports; Copper alloys; Elbows of metal for flexible pipes; Hardware, namely, metal brackets for general use; Metal clad pipes; Metal conduit; Metal decking; Metal poles