Alloys of common metal; building materials of metal, namely, windows of metal, door panels of metal, ceilings of metal, girders of metal, porches of metal, platforms, prefabricated, of metal; door casings of metal; insect screens of metal; window frames of metal; jalousies of metal; fittings of metal for building, namely, door fittings of metal, window fittings of metal; fittings of metal for furniture; aluminium ingots; roofing of metal