Push Back racking is a rack system that combines standard selective pallet racking with a cart and rail system that sets on horizontal load beams, but the advantage is you can have 2, 3, 4, 5, up to 7 pallet positions deep. It can go multiple levels high. As a pallet is loaded from the front, it pushes the pallet behind it back one position. When unloading, the front pallet is removed and the rear pallets automatically roll forward in a slow and controlled speed to the front picking position. This allows for easily accessible Last-In-First-Out (LIFO) storage. Operators can store product from 2-7 pallets deep, with front-only loading from a single aisle. Push Back offers more versatile storage than Drive-In rack because each lane flows independently and vertical storage operates separately from lanes below. Multiple pick facings for a variety of SKUs can be stored and retrieved without disturbing other product above or below in a single-lane or double-lane format.