The most inexpensive dense storage method, but needs to be well designed for storage of very high on hand SKUs that do not have FIFO handling requirements.
A very effective storage method for medium density SKUs. It also provides good operational efficiency because pallets gravity flow back to the pick face where they are placed in the rack. FIFO can still often be managed if done by date code or lot code.
Pallet Flow Rack
Pallets are put away on one side of the storage system and gravity flow down to where they are picked on the opposite side of the storage system. The system provides automatic FIFO picking by design. This storage method allows for very good density of storage and operational efficiency.
Semi-Automated Deep Lane Storage Cart
Pallets are stored in a very deep storage system, but are able to be picked and put away efficiently using a semi-automated cart the moves the pallets within the system to either end where they are picked up or dropped off by forklifts. Provides extremely good density of storage and still allows for efficient picking and put away. Can be designed and utilized as a FIFO system.
Cart Based Fully Automated AS/RS
Pallets enter and exit an automated system by a conveyor. Pallets are handled and stored completely by the automated storage system. As a goods to man picking solution, these systems provide tremendous operational efficiency and density of storage. Cart based systems are less costly and much more flexible than crane based AS/RS systems.
Double Deep Selective Rack
Is a low cost storage medium that provides twice the density of typical selective pallet rack. This storage method can be a good solution for FPI/FPO operations that need more density, but don’t have huge quantities on hand by SKU.
Most FPI/FPO operations will have some selective rack for small quantity on hand SKUs. Density can be increased some by utilizing selective rack with VNA (very narrow aisle) material handling equipment that allows for reduced forklift aisles and increased density of storage.