The most basic and common version of pallet rack systems. These are perfect for situations where there’s low turnover volume but a wide range of product types or SKU’s. Selective Pallet racking consists of a set of upright frames connected in various ways by horizontal beams to provide storage for palletized or non-palletized product depending on the rack configuration and beam supports used. It comes in two varieties: single or double deep. Single deep selective racking is the most common type of pallet racking in use and is one of the least costly types of basic storage.
Pallet flow systems consist of a rail or conveyor system installed in a pallet rack that can be 20 or more pallets deep. There are many versions of the flow mechanism, but the basic premise is to feed pallets in one end and pick them up on the other. Typically some sort of speed restrictor is installed in deeper systems to prevent impact damage. These systems provide the density and FIFO storage possible with drive-thru without the requirements to drive into the rack system. It is used when:
- SKU count is low
- FIFO is desired
- Square footage is tight
Pushback pallet racking consists of carts installed into pallet racks. The carts are stacked and allow for storage of up to six pallets deep, although they most typically are no more than four pallets deep.The product is placed on a cart and then pushed back when the next pallet is placed in front of it. This is done until the final cart is pushed back and the last pallet is stored onto the rack beam. When a pallet is removed, the successive pallets move forward because the carts are installed on a slight decline toward the front beam.This system provides high storage density and is used when deep storage is desired near a wall or for medium turnover products with multiple pallets per SKU.This storage system is also used when LIFO is an acceptable means to rotate inventory. Pushback racking is typically the most costly type of manual pallet storage.