Selective Pallet Rack is the most popular type of rack found in the warehouse world. Selective pallet rack gets its name for providing the convenience to those who are loading/unloading the rack to select any pallet they want without having to move any other pallet to get to it.
Drive-in Pallet is designed so that a forklift can drive into the the pallet rack structure to retrieve product. Product is placed on slanted rails which will slide the pallet down deeper into the pallet rack structure.
Push back racking (also referred to as pushback racking) is a pallet storage system that allows pallets to be stored from 2 to 6 deep on either side of an aisle, giving you higher storage density than other forms of racking.