How Wide Should Your Warehouse Aisles Be?
Direct answer: Typical aisle widths are around 3.5–4.0 m for counterbalance trucks, 2.7–3.2 m for reach trucks and under 2.0 m for very narrow aisle (VNA) trucks. The right width for a given site comes from the truck's actual right-angle stacking dimension plus safety clearance, not from a generic table.
Start from the truck, not the racking
Aisle width is decided first by the handling equipment and only then by storage density. A standard counterbalance forklift usually works in aisles around 3.5 metres or wider. Reach trucks typically manage in roughly 2.6 to 2.9 metres, while very narrow aisle (VNA) trucks can operate in aisles under 2 metres when guidance systems are installed.
Because aisle width directly reduces the space available for racking, equipment choice has a permanent effect on how many pallet positions a building can hold. Changing equipment later is expensive, so the decision deserves a layout study before racking is ordered.
Density versus flexibility
Narrow aisles increase pallet positions but constrain truck choice, speed and tolerance to floor irregularities. VNA installations usually need guide rails or wire guidance and very flat floors, which raises both installation and maintenance requirements.
A practical compromise for mid-size warehouses is a mixed layout: conventional reach-truck aisles for fast-moving SKUs near dispatch, and one or two narrow-aisle zones for slow movers high up.
Do not forget pedestrian routes
Aisle planning is also about people. Picking aisles used by staff on foot, cross-aisles connecting main routes, and staging areas at dock doors all take floor space. Marking separate pedestrian walkways and one-way truck routes reduces the most common accident pattern: truck and pedestrian sharing the same lane.
When we plan racking layouts for customers, we always ask for the full equipment list and pedestrian flows first, then fit the racking into what remains.
FAQ
What is the typical aisle width for a reach truck?
Most reach trucks work comfortably in aisles of about 2.6 to 2.9 metres, depending on pallet size and turning allowances. Always confirm with the truck manufacturer for the specific model and pallet type.
Can I narrow existing aisles without changing trucks?
Usually no, unless the current width has a large safety margin. Aisle reduction must be validated against the truck turning diagram, load overhang and racking tolerances, ideally with a trial layout on paper first.
Do VNA trucks need special floors?
Yes. VNA operation relies on precise steering, which requires a much flatter floor than conventional warehouses, plus rail or wire guidance in the aisles. Floor flatness should be specified before the slab is poured.
How much storage do I lose per extra 10 cm of aisle width?
It depends on rack run length and number of aisles. In small buildings the loss is proportionally large; even a few centimetres multiplied across many aisles can cost an entire rack row.
All figures above refer to standard product data sheets; final confirmation is subject to written quotation.