Very narrow aisle pallet rack is one of the typical selective pallet racking system.Its three direction stacking forklift slide guide is installed at the bottom of the shelf. Unequal angle steel is used in the guide rail. It applies a special three direction stacking forklift. The forklift slide along the settled guide rail. The lane of the racking system  is a little wider than the pallet cargoes, which realize high density storage. It at the same time has the feature of selective racking system that the forklift can store any pallet of cargoes. The high effeciency and high density of storage brings great production rate and save the cost of the storage and transport.