Constructions, transportable, of metal; non-electric cables and wires of common metal; pipes and tubes of metal; posts of metal; gates of metal; portable building structures of metal; modular prefabricated steel frames for building; modular metal wall panels; modular portable constructions of metal; pre-fabricated or modular metal stables; prefabricated transportable metal constructions; modular transportable construction elements in the nature of supports, and constructions, all of steel; mo...