building materials of metal, in particular aluminium profiles, decorative panels, wall panels, floor boards and ceiling boards, supports being ceiling supports, wall supports, door supports, floor supports, shelf supports and table supports, profiled connecting trim and turnbuckles, sectional joining strips, doors and door frames, moveable partition panels for dividing rooms in the nature of metal partitions for building, retaining devices of metal; all of the foregoing for use in constructin...