Abstract: The wheeled frame remaining after removal of the detachable cargo container, is gripped by clamping mechanism of a carrying unit mounted on a tractor or lift truck, then elevated above the ground and pivoted from its normal horizontal disposition to vertical position, and then transported to a multiple storage unit where it is deposited and retained in the vertical position removably in one of a plurality of compartments making up the storage unit. A plurality of such wheeled frames may be stored in this manner by deposit in successive ones of the compartments, and they are removed from the compartment in the reverse order of deposit.

Abstract: A trailer frame storage system comprises a plurality of storage units connected closely together in laterally spaced apart condition, each storage unit having a plurality of longitudinally spaced, folding trailer frame support arms each arranged to receive and support a trailer frame for storage in a substantially vertical position in which the trailer frame is rested on its rear end on the ground and its forward end extends upwardly. Each arm is extended, one at a time from rear to front, by movement of the next rearward arm to fully extended position as a trailer frame is rested against it, the frames being transported longitudinally into the storage unit, successively filling the unit from the rear end to the front end. Removal of the stored trailer frames follows the reverse order, and removal of each frame results in it engaging the next adjacent forward arm from which a trailer frame has been removed, to cause said forward arm to be moved toward retracted position.

Abstract: The wheeled frame remaining after removal therefrom of the detachable cargo container, is gripped by clamping mechanism of a carrying unit mounted on a tractor or lift truck, then elevated above the ground and pivoted from its normal horizontal disposition to vertical position, and then transported to a multiple storage unit where it is deposited and retained in said vertical position removably in one of a plurality of compartments making up the storage unit. A plurality of such wheeled frames may be stored in this manner by deposit in successive ones of the compartments, and they are removed from the compartment in the reverse order of deposit.