Features: 1) Made of continuous rows of upright frames interconnected by spacers2) Forklift trucks drive along each aisles (lane) to store or retrieve pallets3) Each aisle consists of several levels of pallet support rail4) Pallets are placed on the pallet support rail one after another along the aisles5) Top and back bracings are used to stabilize system structure6) All components are epoxy powder coated except the galvanized footplates7) Accessories include shim, upright protector, forklift guide rail