1 through shelves, also known as Corridor shelf or into the shelf, the whole plug assembly structure, column-chip assembly structure, corbel for a one-time stamping cross-shaped corbels, high strength and good rigidity, beautiful appearance, the top between the beam and column piece bolted structure; 
 2 wall shelves of the regional total depth of the best control in the tray depth of less than 6, the total depth of the middle region on both sides out of the shelf is usually best to control the depth of less than 12 pallets in order to improve the efficiency and reliability of the forklift access . 
 Such shelf stability of the system for all types of shelves is relatively weak, this shelf should not be too high, generally less than 11m, still need to add another system to set up the pull-solid device. 
 Four such systems shelf arrangement-intensive, high utilization of space, almost twice that of conventional pallet rack, suitable for storage of a large displacement of a small species of the same type of goods, the goods can be remove from the same side of the deposit (advanced after a ) can also be deposited from the side of the other side out (FIFO), used for dairy, beverage and food industry, cold storage is also more common.