In order to work efficiently Forklift vehicles require a certain amount of space. The space allocated between loads across the traffic aisle is considered the Working Aisle. The vehicle should be able to perform all necessary tasks to stack, store and retrieve loads in this aisle. This minimum dimension will vary with each forklift model and type.
If the dimension indicated on the specification sheet shows a working aisle of 11'4" then this is the minimum requirement between racks or loads across the vehicle aisle.