Forklift aisle widths are typically set when pallet racking is installed. In many cases, such as narrow aisle projects, these spaces are critically important. Typically, warehouse managers don’t attempt to lay out these types of storage facilities. But for reach truck, selective rack applications, these aisle sizes are often “eye balled,” or given a 12′ width no matter what type of forklift is using the aisles. If you are laying out a facility, what criteria should you use for rack aisle width?