Crossbeam shelf, also known as picking pallet shelf, is generally stored in pallet unit, which is suitable for various warehouses and is the most widely used form of shelf. The requirement of material handling equipment is low, and the cost of shelf is the lowest. Picking shelf is the most widely used storage system for pallets, which has strong versatility. Each pallet can be accessed 100% separately, which is convenient and fast. After use, the height of the crossbeam can be adjusted at will, the number of crossbeam layers can be increased, and the flexibility is very strong, which is especially suitable for users whose pallet shelf size often changes.