Push Back Rack
Push back racks offer the same storage density as drive-in racks but greater selectivity. All loads are stored and retrieved from the aisle. Loads in each lane rest on a cart on a rail that slopes slightly toward the front. When a new load is deposited into a lane, it ‘pushes back’ the one already at the face and all of those behind it. Then, when that load is picked, the contents of the lane all move forward again, hence the term "Push Back Rack".
The objective of push back rack is to reduce honeycombing or empty pick faces. The ideal application for push back racks is where all loads in a lane are identical and first-in/first-out stock rotation is not crucial.