In warehouse operations, racking failures are rarely random. They almost always trace back to equipment that was never independently tested to a recognised standard, or where the product specification didn’t reflect real-world loading conditions.
ANSI MH26.2 exists to close that gap. It is the only internationally recognised standard specifically developed for the design, testing and utilisation of wire mesh decking used in industrial pallet racking systems.
At MantaMESH, every wire decking product is rated in accordance with ANSI MH26.2 - not because it is a box ticking exercise, but because it is the most meaningful benchmark available for wire decking performance.
What is ANSI MH26.2?
The standard was developed by the Rack Manufacturers Institute (RMI), a specialist industry group operating under the American National Standards Institute (ANSI) framework. First published in 2007 and most recently updated in 2023, ANSI MH26.2 covers:
- Design and fabrication requirements
- Materials and dimensional characteristics
- Laboratory test procedures and safety factors
- Application and utilisation guidance
No other international standard is specifically tailored to wire mesh decking in warehouse racking. That makes ANSI MH26.2 the definitive industry reference worldwide.
How does the ANSI standard test wire decking?
The ANSI MH26.2 test methodology is built around a Uniformly Distributed Load (UDL), which is a controlled, repeatable laboratory load applied across the full surface of the wire deck.
Critically, all tests are performed independently of the rack beams. The wire mesh deck must carry its full rated load without any contribution from the rack beams. This isolates the deck's own structural performance and makes the result genuinely meaningful.
The standard derives two values from the test procedure:
- W1 - Deflection limit: The load at which the wire deck reaches a maximum deflection of 1/165 of the rack depth. This establishes the serviceability limit of the deck.
- W2 - Structural collapse limit: The ultimate load at which structural collapse occurs, divided by 2. This reflects ANSI MH26.2's mandatory minimum safety factor of 2, meaning the collapse load must be at least double the rated working load.
The ANSI rated capacity of the wire mesh deck is the lesser of W1 and W2. This ensures the published rating satisfies both serviceability and structural integrity - the lower value sets the rated capacity.
Why does rack beam isolation matter? Because in a working warehouse, pallets do not always land squarely on the beams. Wire decking tested with beam contact can produce misleading results, leading to one that performs differently once a pallet rests entirely on the mesh. The ANSI MH26.2 standard works to remove this ambiguity.
“You don’t need ANSI rated wire decking if the load is supported by the rack beams.” Do you agree?
This is a common argument made to justify cheaper, unrated wire decking - and it deserves a direct response.
The claim is technically plausible in a single, controlled scenario. But in a real warehouse, the assumption that load is consistently and predictably transferred to the rack beams is one that breaks down quickly. Pallet quality and dimensions vary, foot configurations differ and load placement shifts. The moment a pallet sits differently than assumed, the wire deck is carrying more than the calculation allowed for and there is no rated capacity to reliably fall back on.
An ANSI rated wire deck removes that uncertainty entirely. The ANSI MH26.2 UDL test rates the wire deck to carry its full stated load independently of the rack beams and deliberately tests for the most demanding conditions possible. That rating holds regardless of how the load is placed, how the pallet is positioned or what changes in your warehouse operation over time.
Unrated wire decking has no independently verified performance benchmark. If something goes wrong, there is no standard to point to, no tested safety factor and no documentation that due diligence was exercised in specifying the equipment.
The argument that rack beam support removes the need for an ANSI rating is really an argument for accepting unknown risk. For most operations, that is not a trade-off worth making.
Every MantaMESH wire deck has an ANSI MH26.2 compliant load rating, independently tested, supported with an item data sheet and specified on the Orange Tag™ fixed to every item.
Our recommendation
Selecting an ANSI rated wire decking solution that matches the load for your application is the straightforward path to a safer warehouse. It protects your racking investment, reduces long-term repair and replacement costs, and most importantly, protects your employees from harm.
Choosing an ANSI rated wire decking solution is not simply a compliance step, it is a decision to use equipment whose performance has been independently verified. And that is a meaningful difference when the alternative is a specification based on an unverified claim.
Explore the MantaMESH® wire decking range or use our product configurator to build a fully compliant, ANSI rated specification tailored to your exact load requirements.