Pallet rack, also referred to as “pallet racking,” is a material handling storage aid system designed to store materials on pallets (or “skids”). Although there are lots of varieties of pallet rack, all types permit for the storage of palletized materials in horizontal rows with multiple levels. One system is a rack supported building. Very Narrow Aisle (VNA) is the use of choosy pallet racking in a tighter configuration to offer maximum space utilization within a storage facility. These systems typically operate in conjunction with wire-guided or rail-guided reach-truck systems. With only one way in, the most recent pallet put into a queue is necessarily the first one to be taken out. A drive-thru storage arrangement, with two diverse entry points, can also use a FIFO (first in, first out) storage method. With a FIFO system, pallets are loaded in one end and are pushed back to the other end, where they are then at the front of the row on the opposite side.
