OPEN AND CLOSED PROFILES AND TUBES OF METAL AND FITTINGS THEREFOR FOR DOORS, WINDOWS, GLAZINGS AND FRAMES; OPEN AND CLOSED PROFILES AND TUBES OF STEEL AND ALLOY STEEL; METAL BUILDING MATERIALS IN THE NATURE OF METAL FITTINGS FOR MAKING, ASSEMBLING AND FASTENING WINDOWS, DOORS, FRAMES AND GLAZINGS, ALL WITH AND WITHOUT THERMAL INSULATION INCORPORATED THEREIN; DOORS, WINDOWS, FRAMES AND GLAZINGS, ALL OF METAL; DOORS, WINDOWS, FRAMES AND GLAZINGS, ALL OF METAL FOR PROTECTION AGAINST FIRE AND SMOKE