Double deep pallet racks are special type of selective pallet racking system which uses same aisle to place one pallet in front of another in the same rack bay. For maneuvering in these racks its neccessary to have special forklift trucks with telescopic forks. Direct aproach to each pallet unit is not possible, so its neccessary to establish priorities for pallet handling. This system of racks belongs to clasification named FILO (First In Last Out).