Platforms of metal; platforms, prefabricated of metal; stage platform structures of metal; structural platforms (structures) of metal; working platforms [structures] of metals; floating breakwaters of metal; floating breakwaters of metal for the use in boat marinas; floating docks of metal for marinas; floating docks of metal for mooring boats; pontoon supports of metal; movable metal framed stage platform units; movable metal framed studio platform units