Abstract: In a push back cart rack storage system, the top or first cart, as well as the second cart, may be made with less material, and may be significantly simpler and lighter in comparison to existing designs. A push-back cart storage system has a single pair of push-back rails in each lane. A third cart has front and back wheels rolling on a lower inside flange of the push-back rails. A second cart has front wheels rolling on a lower inside cart flange of side rails of the third cart, and has rear wheels rolling on the lower inside flange of the push-back rails. A first or top cart has front and rear wheels rolling on a top surface of the push-back rails. The wheels on the first cart may be inner facing wheels while the wheels on the other carts may be outer facing wheels. The push-back rails and the side rails of the carts may be generally C-shaped channel sections.

Abstract: A push-back cart storage system has one or more push-back carts having a cross-member formed by a structural angle section having cutouts at opposite ends to provide clearance for the second push-back cart to move under the first push-back cart. The cross member provides a truss or joist type of beam support having a full height middle section which resists bending and a reduced height at the ends, to provide a low profile. Side members or angle sections on the cart have through holes for attaching wheels, with no welding of wheel mounts required.

Abstract: In a push back cart rack storage system, the top or first cart, as well as the second cart, may be made with less material, and may be significantly simpler and lighter in comparison to existing designs. A push-back cart storage system has a single pair of push-back rails in each lane. A third cart has front and back wheels rolling on a lower inside flange of the push-back rails. A second cart has front wheels rolling on a lower inside cart flange of side rails of the third cart, and has rear wheels rolling on the lower inside flange of the push-back rails. A first or top cart has front and rear wheels rolling on a top surface of the push-back rails. The wheels on the first cart may be inner facing wheels while the wheels on the other carts may be outer facing wheels. The push-back rails and the side rails of the carts may be generally C-shaped channel sections.

Abstract: A push-back cart storage system has one or more push-back carts having a cross-member formed by a structural angle section having cutouts at opposite ends to provide clearance for the second push-back cart to move under the first push-back cart. The cross member provides a truss or joist type of beam support having a full height middle section which resists bending and a reduced height at the ends, to provide a low profile. Side members or angle sections on the cart have through holes for attaching wheels, with no welding of wheel mounts required.

Abstract: A pushback cart storage system includes a cart having a first pair of wheels located at a front end of the cart, and a second pair of wheels located between a rear end of the cart and a midpoint of the cart. The wheels roll along rails on a storage rack or frame. The second pair of wheels is located closer to the midpoint than to the rear end of the cart, such that the rear end of the cart extends beyond the end of the rails when the second pair of wheels are rolled to the end of the rails. Accordingly, less steel, or other material, is required to construct the rails of the storage rack, which reduces the overall cost and weight of the system, while allowing the system to support the same number of pallets as a conventional system.