Converting warehouse to Very Narrow Aisle (VNA) racking

With higher demands for optimizing warehouse footprints, operators often look at approaches to maximize pallet positions within their facility. For operators running “wide aisle” selective pallet operations utilizing conventional handling equipment such as counter balance or reach trucks, finding additional space is a challenge. Faced with the options of expanding the facility or utilizing a 3rd party provider to meet demands can be both expensive and time consuming.  A third option of converting an existing facility to a VNA (Very Narrow Aisle) racking configuration becomes an attractive option.

The primary challenge in converting a warehouse to VNA, is that in the majority of cases the floor slab has not been constructed to a flatness tolerance that safely supports VNA truck movements within the aisles. As aisle widths are drawn in to accommodate truck widths, generally 1.6-2m widths, static sway and lean in the mast of the VNA truck becomes a critical parameter in assessing a floors ability to support truck movements without collisions with the racking or its contents.

After selecting an appropriate racking layout operators would normally survey the floor with a digital profilograph which would give an accurate reading of the floors ability to safely and efficiently support VNA forklifts.  Assuming the floor tolerances failed the parameters required by the forklift manufactures to guarantee full speed travel in the aisles, the floor aisles would need to be mechanically ground and certified in all aisles.

When assessing the required flatness tolerances required it is essential to consider the key parameters of the operation to ensure the safety, efficiency and reliability of the operation, these include:

  1. Max lift height of the VNA truck, often referred to as “top beam height”
  2. Centre to centre front axel spacing of the VNA truck selected
  3. Truck manufacturers recommendation to ensure “full speed movement” of the truck.

Not all VNA aisle grinding is the same and its critical to understand the differences.  An investment in maximizing pallet positions in your facility should not be restricted by a floor that is not fit for purpose.  Any aisle grinding that does not guarantee the safe and full speed movement of your trucks, as determined by the manufacturer, should be heavily vetted prior to selection.

Our services that use this product

VNA Floor Grinding

Cantec provides Very Narrow Aisle grinding services for VNA operators in the logistics industry.
Our ultra ­modern, fully electro­-robotic “FloorShaver” allows us to grind aisles to tolerances that are unmatched in the industry. Our system grinds aisles to the VDMA Ultraflat standard which is the most rigorous in the industry. Our production rates average 7-10 times faster than our competition. We are able to guarantee the full speed movement of VNA trucks when operating in the aisles. This way we can help to maximize our customers ROI through optimised VNA truck operations, reduced truck and floor maintenance, maximised safety, and greatly reduced grinding time.

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Digital Flatness Survey

Cantec is able to survey floors for defined movement and free movement specifications to the following standards: TR34,Din18202,VDMA, EN 15620 and ASTMFF/FL.

Surveys are carried out using our Floor Profiler digital floor measurement instrument, as well as optical level surveys when required.

All surveys are checked against the specified flatness standard/guideline. Following this process, reports tallying results are being produced.

As digital flatness instruments are used to survey floors and compile data automatically, data cannot be tampered with or manipulated in any way.

Learn more about the products we use for digital flatness surveying:

Learn more about our experience in digital flatness surveying: