Abstract: Containers and similar standardized load units mean a considerable saving in the manual work implied in loading and unloading of a ship. The time a ship stays in harbour is a loss, from the transportation point of view, and should be shortened as much as possible. That could be attained if the containers could be grouped together in prearranged compounds.The invention presupposes a beam frame support for such a compound as well as a trolley member adapted to move said support. The latter, which must follow the ship on its journey, must be very low, so as not to steal valuable space on board the ship and the trolley member must be able to fit into this low support.