Abstract: A shelf frame assembly system includes a first vertical post that includes a plurality of openings, a side beam comprising a receiving bore, an end piece having a coupling portion and a receiving portion that includes a plurality of protrusions, and an end connector configured to be inserted into one of the plurality of openings. The end connector includes a plurality of recesses configured to receive the plurality of protrusions and a stop configured to make contact with at least one edge of the one of the plurality of openings. The receiving bore of the side beam is configured to receive the coupling portion of the end piece. The receiving portion of the side beam connector is configured to receive the end connector. Further, the plurality of protrusions are configured to resist a horizontal withdrawal of the side beam connector from the end connector.

Abstract: A shelf frame assembly system includes a first vertical post that includes a plurality of openings, a side beam comprising a receiving bore, an end piece having a coupling portion and a receiving portion that includes a plurality of protrusions, and an end connect- or configured to be inserted into one of the plurality of openings. The end connector includes a plurality of recesses configured to receive the plurality of protrusions and a stop configured to make contact with at least one edge of the one of the plurality of openings. The receiving bore of the side beam is configured to receive the coupling portion of the end piece. The receiving portion of the side beam connector is configured to receive the end connector. Further, the plurality of protrusions are configured to resist a horizontal withdrawal of the side beam connector from the end connector.

Abstract: A utility cart includes an auxiliary swivel caster wheel assembly, a locking mechanism, and a trigger mechanism for causing the locking mechanism to releasably lock the auxiliary swivel caster wheel assembly. The auxiliary swivel caster wheel assembly is unlocked to enable the auxiliary swivel caster wheel to rotate about a vertical axis for improved maneuverability in small areas, and is locked to hold the auxiliary swivel caster wheel in a predetermined position for improved steering as the cart is moved from one location to another. The trigger mechanism is disposed on a steering handle to enable dynamic actuation of the locking mechanism while the cart is in motion.

Abstract: A utility cart includes an auxiliary swivel caster wheel assembly, a locking mechanism, and a trigger mechanism for causing the locking mechanism to releasably lock the auxiliary swivel caster wheel assembly. The auxiliary swivel caster wheel assembly is unlocked to enable the auxiliary swivel caster wheel to rotate about a vertical axis for improved maneuverability in small areas, and is locked to hold the auxiliary swivel caster wheel in a predetermined position for improved steering as the cart is moved from one location to another. The trigger mechanism is disposed on a steering handle to enable dynamic actuation of the locking mechanism while the cart is in motion.