Narrow beam type is also called the VNA shelves, specifically to conventional beam racking system chooses the forklift forklift for the three systems, as compared with conventional pallet racking system, the difference is that a very narrow roadway width of pallet racking system is much smaller than conventional pallet racking system, generally about 1600-2000 - mm, space utilization and increase by around 20%, shelf height can be set higher, up to 15 meters, generally must be set on both sides of channel guide guardrail, thought of three-way forklift driving direction, or forklift use magnetic guiding forklift. The three-way forklift can be divided into ordinary three-way forklift and magnetic forklift. The operation speed of the three-way forklift is slower than that of the general forklift. It can only move forward or backward in the passage.