Aisle Width
Aisle widths are the distance between pallets across an aisle. Be sure that you are not measuring from the face of the rack to the face of the rack. Most pallets will typically overhang the depth of the rack, cutting down the available aisle space.

The turning radius of your fork lift and the depth of your pallet will be a factor in determining aisle widths. Check with the manufacturer of your forklift for their recommendations as this can vary greatly by the manufacturer and model of the fork lift that you are using.

Below are some "ballpark" aisle widths for a quick reference.