6 Metal building materials, namely brackets of metal for building, frame work of metal for building, re-enforcing materials of metal for building, building boards of metal, building panels of metal, pre-fabricated platforms of metal, porches of metal, roofing of metal, sheets and plates of metal and tiles of metal for building; transportable buildings of metal; non-electric cables and wires of common metal; small items of metal hardware, namely nails, screws and bolts; pipes and tubes of metal; safes made of metal; flanges made of metal to connect tubes, pipes, machinery and process equipment used in the process industry and other related industries