VNA rack, also known as narrow-lane cross-beam rack, refers to the system when the forklift truck used in the conventional cross-beam rack system is a three-way forklift truck. Compared with the conventional pallet rack system, the difference is that the lane width of the narrow-lane pallet rack system is much smaller than that of the conventional pallet rack system, which is generally about 1600-2000 mm, the space utilization rate is increased by about 20%, and the height of the shelf is also increased. It can be set higher, up to about 15 meters. Generally, guide rails must be set on both sides of the passage to guide the three-way forklift, or magnetic guide forklift truck is selected for forklift truck. Three-way forklift can be divided into two types: ordinary three-way forklift and magnetic line three-way forklift. The three-way forklift can also carry a manual picking platform to realize the picking operation. The working speed of three-way forklift truck is slower than that of general forklift truck. It can only move forward or backward in the passage. The turning radius is larger, and the front end of the passage must reserve larger space.

If the storage or logistics center has the following characteristics, VNA shelf system can be considered:
1. Storage of large quantities of goods, goods in and out more frequently and have higher requirements for the selection of goods;
2. Storage and logistics centers urgently need to increase storage or require a certain amount of storage.
3. Logistics efficiency requires a higher level.
4. The net usable height of warehouse is higher than 8M.
5. Forklift trucks can choose independent storage forklift trucks, and there is no plan to use storage forklift trucks to drive outdoors to perform other tasks.