Very Narrow Aisle (VNA)
VNA racking systems allow warehouse opera- tors to increase storage capacity by shrinking the aisles between each row of racks. Because VNA systems can employ aisles as narrow as 5.5’, these systems are typically installed in conjunction with a guide-wire that is embedded into the concrete floor that serves to prevent human-steered machines from colliding with the racking. This wire provides tracking for wire- guided turret trucks or other wire-guided picking machines and ensures that these reach trucks travel only on a predefined path without reducing vehicle speed or efficiency. VNA racking is a terrific way to maximize usable storage space without sacrificing picking or putaway productivity, but the cost of the wire-guided machines sometimes poses a bit of a financial hurdle.