The structure is designed to move containers with spare parts between assembly sites at the production lines. This method of in-plant displacement can be used as an alternative to conventional gravity-fed racks in a situation where it is required to overcome passage between the point of loading of the container and the one of its unloading. Rails on which the rack with the load moves, are made flush with a floor and, thus, they do not obstruct passage of people. No electricity is used by the system, and it also plays in its advantage.