Introduction: Minimum aisle width for a narrow aisle electric stacker is a turn geometry result, not a number copied from a catalog alone.
When warehouse teams plan a narrow aisle, they often look for one figure that tells them whether a stand-on electric stacker will fit. That figure is useful, but it is the end of the calculation, not the start. A published aisle width such as 2300 mm only makes sense when it is read together with the stacker’s turning radius, chassis length, rear swing, load size, and the clearance left around racks and walls. The goal here is to show how those pieces fit together, using a 1400 mm turning radius and a 2300 mm aisle example as geometry, not as a universal warehouse rule.
A warehouse aisle is not just a line on a drawing. It is the space a machine sweeps through when it turns, lifts, and positions a pallet. During a right-angle stacking turn, the stacker rotates around its steering geometry, the rear of the chassis swings outward, and the fork carriage and load move through a wide arc. The minimum aisle width has to contain all of that movement plus a safety margin. That is why warehouse planning guidance from MHI treats clear aisle width as a planning concept tied to traffic, storage, and clearance, not as one fixed number that works everywhere. That difference matters because two warehouses can share the same 2300 mm aisle measurement and still create very different turning conditions. Rack uprights, pallet overhang, floor markings, sprinkler pipes, and pedestrian routes all reduce the usable space inside the aisle. Buyers who compare electric stacker manufacturers or warehouse handling equipment manufacturers often see a single minimum aisle figure and assume it is the whole answer. A better habit is to ask what configuration produced that figure: which turning radius, which chassis length, which load width, and which clearance assumption. Once those inputs are visible, the aisle number becomes a useful planning guide instead of an isolated specification.
Turning radius is one of the most important inputs because it describes how tightly the stacker can rotate. In a narrow aisle, the critical moment is usually the right-angle stacking turn. The front of the truck moves toward the rack, the rear swings out, and the load shifts through the aisle. A smaller turning radius, such as the 1400 mm figure published for the LINOTR CDD-20, reduces the amount of space the machine needs to complete that turn. It does not remove the rear swing, because the chassis is still rotating around a pivot point. The 2300 mm aisle example in that same product information shows how a turning radius, chassis length, and working clearance can fit together in one narrow aisle scenario. The turning radius is the rotation capability; the aisle width is the room left for the whole movement.
Chassis length adds another layer. A stacker with an 1850 mm body length, measured with the pedal folded, takes up less longitudinal space than a longer machine, but it still needs room for the rear to swing and the forks to enter the rack. Pedal position changes that body length, which changes how much of the aisle is consumed during a turn. The published chassis width also matters: an 825 mm width for 1.6 m to 3.5 m masts and a 990 mm width for the 4.5 m mast version leave different side clearances. Ground clearance of 30 mm does not change aisle width directly, but it confirms the stacker is built for smooth indoor floors. Together, these dimensions explain why aisle width cannot be calculated from turning radius alone.
A 2300 mm aisle example is helpful because it turns a set of separate dimensions into a working scene. It says that when a stacker has a 1400 mm turning radius, an 1850 mm chassis length with the pedal folded, a known fork size, and a normal pallet load, the turning and stacking movement can be planned inside that aisle. For a warehouse learner, that is valuable because it shows the relationship between the machine and the building. It also gives a starting point for checking whether a similar aisle can handle a similar turn. What the example cannot do is act as a universal warehouse rule. A 2300 mm aisle may be tight in one building and comfortable in another, depending on rack layout, pallet overhang, floor markings, local safety requirements, and the amount of clearance the operation wants around people and equipment. The number is also not made by simply adding 1400 mm and a chassis width. The real check follows the swept path: the rear swing, the fork tip, the load corners, and the space left beside the racks. MHI’s order-fulfillment material and FEM’s industrial truck terminology both point toward this movement-based view. The useful takeaway is that 2300 mm is a geometry example, not a promise that every narrow aisle will work.
Minimum aisle width for a narrow aisle electric stacker is a relationship between turning radius, chassis length, rear swing, load size, and clearance. A 2300 mm example and a 1400 mm turning radius can help a planner see how those pieces interact, but they should not be copied into a different warehouse without checking the actual layout. The practical move is to measure the aisle, note the rack and pallet dimensions, and compare them with the stacker’s swept path. Readers who want to see how these numbers appear in a real product can review the CDD-20 product information and compare its geometry with their own aisle layout.
A：Minimum aisle width is calculated by looking at the stacker’s swept path during a turn, not by using one specification. The planner combines the turning radius, chassis length, rear swing, fork and load dimensions, and the clearance needed beside racks, walls, and pedestrians. A published figure such as 2300 mm is a worked example for a specific configuration. The real calculation for a site starts with the actual aisle, rack layout, pallet size, and safety margin, then checks whether the stacker can complete its stacking turn without contact or excessive tightness.
A：Turning radius matters because it controls how much space the stacker needs to rotate and how far the rear swings during a right-angle stacking turn. A shorter overall length helps, but a machine with a large turning radius can still sweep a wide path through a narrow aisle. The turning radius and chassis length work together: the radius defines the rotation, while the chassis length defines how much body is moving through that rotation. In a narrow aisle, the rear swing is often the limiting factor, which is why a 1400 mm turning radius is read alongside the aisle width rather than on its own.
A：No. A 2300 mm aisle width is a product example, not a universal warehouse rule. It can work in one building and be too tight in another because rack layout, pallet overhang, floor markings, local safety requirements, and desired clearance all change the usable space. The same 2300 mm aisle may also feel different with a different load size or a different stacker configuration. The reliable approach is to compare the stacker’s published turning radius and chassis length with the actual aisle and rack dimensions, then allow for the rear swing and safety clearance.
MHI - The Industry That Makes Supply Chains Work
MHI - The Industry That Makes Supply Chains Work
