Floor tolerance surveying for defined traffic and VNA

Overview

Operations in industrial warehouses, cold storage facilities, food distribution, manufacturing, pharmaceuticals, materials handling, 3PL, and aerospace hangar facilities depend on predictable floor profiles. Very narrow aisle lift trucks need smooth steady travel. Robotics and AGV systems need precise approaches to rails transfer pads and handoff points. Our floor tolerance surveying service checks existing slabs to the exact specification you require. 

Standards we survey

Very Narrow Aisle or VNA applications enable warehouses, industrial applications, and others to store inventory in a vertical manner.  This application can allow for more inventory in a smaller footprint.  With VNA lift trucks, AGV lift trucks, and LGV lift trucks to operate in a safe manner while maintaining the desired footprint.  To do so the floor must meet much more stringent tolerances than a normal free movement application.  CTR (Concrete Testing and Remediation) can survey to the required standards and offer clear results per aisle, a compliance table with pass or fail status.  The generated report will give clients clear information on what remediation, if any is needed for their application.

VNA floors in the United States are most often measured to F min specifications, while in other regions (and in many robotics or high-pick AGV projects) requirements may reference TR34 defined-movement (DM) or VDMA standards. CTR can survey and document compliance to F min, TR34, VDMA, and DIN 18202 as specified.

F min for very narrow aisle

Defined traffic aisles require acceptance that reflects what wheels and masts feel in motion. We measure to your specified F min values such as T one hundred and L ninety. Deliverables include traces for each aisle, compliance tables with pass or action calls, and prioritized lists of segments needing work. This applies directly to VNA forklifts, AGV forklifts, and high mast lanes in distribution facilities.

TR34 defined and free movement

TR34 is widely used for warehouse flatwork and industrial floor slabs. We test to the category and span lengths that apply, summarizing exceedances by location, magnitude, and linear footage. In free-movement zones—open areas without racking where forklifts and lift trucks do not operate at height—this standard verifies recognized flatwork quality.

VDMA

VDMA guidance supports VNA distribution facilities with commissioning friendly summaries. We verify compliance with the parameters used for defined traffic in automation lanes and hand over reports that your integrator can rely on.

DIN 18202 and DIN 15185

Where projects require DIN 18202 checks, we measure against the tolerance group and spans specified. Some facilities also request reference to DIN 15185 for narrow aisle truck operation. Results are mapped to site plans so corrections are easy to target.

How we measure

We use metrology workflows that match the standard. For defined traffic aisles we use line based methods that capture longitudinal and transverse response. For open zones we use control sampling that gives high confidence results without shutting down operations. Layout is controlled with total station, and survey work is sequenced with safety and access in mind. Routes are planned so material handling continues while we measure.

We use metrology workflows that align with the standards specified by each system we work with. For systems requiring F-min or VDMA compliance, we apply line-based methods to capture longitudinal and transverse data, as well as the rate of change. In open areas—such as those used for robotics or ASRS systems—we begin by defining the survey boundaries. A floor grid is then established to ensure accurate, location-specific measurements and clear, actionable survey results.