When distribution facility operators are looking to densify their storage layout (store up to twice as many pallets in the same facility when compared with selective rack), many times Pushback Rack systems can be an excellent alternative. A pushback rack system is a LIFO system, normally composed of an inclined rail section that extends the full depth of the storage lane (typically from 2-6 pallets deep). There are a series of nested carts that the pallets rest on top of that roll on the rail system (either C channel or tube construction). For a two deep system, there will be one cart storage position and the final pallet rests on the rail, for a three deep system there are 2 cart storage positions and one rail storage position, etc.How does Pushback Work?
To operate a pushback system, the lift truck operator places the first pallet on the upper cart in the lane. With the second pallet the operator then "pushes back" the first pallet that is resting on the cart. The second pallet is then either placed on the rail in a two deep system, or placed on the next cart in a 3-6 deep system. This process is repeated until the lane is full. To unload the system, the operator removes the last pallet inserted (LIFO) and slowly backs out. The following pallets/carts roll forward on the inclined rail to the front of the system.