VNA stands for Very Narrow Aisle Pallet Racking. There are Material Handling Equipments which needs very narrow aisle, i.e. less than 2 meters. Hence more pallet positions are possible compared to other MHEs. VNAs can reach up to 12 metres high.
Very Narrow Aisle Pallet Racking is nothing but Selective Pallet Racking but compatible to VNA Equipment. This VNA equipment needs special guides. These guides may be mechanical rails or electrical wires. Mechanical guide rails are widely practiced for ease and economy. However, VNA equipments demand high level of floor accuracy.