6 Common metals and their alloys; steels, namely stainless steels, coated steels, lacquered and pre-lacquered steels, carbon steels; construction materials of metal, materials of metal and construction elements of metal in the nature of plates, sheets, profiles, panels, connections for the roofs, floors, building structures and facades of building; profiles of metal made of steel and its alloys, multi-layer metal profiles and sheets made of steel and its alloys, sheets of metal made of steel and its alloys, sandwich plates composed primarily of metal, foils and plates, vinyl coated steel sheets, building panels of metal, door plates of metal; facade facings of metal for building purposes, cladding of metal for walls; steel profiles; transportable metal buildings, metal profiles made of steel and its alloys for building purposes; metal products for building envelopes systems and structures, namely plates, sheets, profiles, panels, connections; building panels of metal incorporating acoustic insulation, cladding and panels of metal for walls