Ask for a pallet's load capacity and you may be given any of three numbers that differ by a factor of five. Confusing them is not an academic problem: the highest number is the one printed in sales literature, and the lowest is the one that governs whether a load stays in a racking beam.
The three numbers
Static load is the weight a pallet carries while stationary on a solid, level floor — for example when block-stacked in a yard. It is the highest of the three, because the pallet is working in compression and fully supported.
Dynamic load is the weight it carries while being moved by a forklift or pallet truck. Typically a third to a quarter of the static figure.
Racking load, also called shelf or beam load, is the weight it carries when supported only at its two ends, with an unsupported span between them. It is always the lowest of the three, because the pallet is now working in bending rather than compression — and it is the figure most often missing from a datasheet.
A plastic pallet datasheet illustrates the spread neatly: one common Euro-format model is rated 7500 kg static, 1250 kg dynamic and 1000 kg racking. That is a 7.5 : 1.25 : 1 ratio between three numbers that all legitimately describe "capacity".
What the standard actually says
Here is a detail that surprises most people: ISO 8611, the pallet testing standard, does not define "static load" or "dynamic load" at all. Those are trade terms. The standard's own vocabulary is different and more precise:
- Maximum working load — the greatest payload a pallet may carry in a specific loading and support condition.
- Nominal load — the lowest test load value for specified support conditions. The standard is explicit that this "does not represent an actual payload on a pallet in use"; it exists to compare different pallets against each other.
- Payload — what the pallet actually carries in use, which may be above or below the nominal load.
The standard's test programme maps onto the trade terms cleanly: bending tests correspond to racking, forklifting tests to handling, and compression and stacking tests to block-stacking. Its definition of racking is worth quoting because it is the source of the risk — "storage of unit loads in drive-in or beam racks with free, unsupported spans".
ISO 8611 also carries a caution that any engineer will appreciate: the test procedures are "approximate simulations of pallet use", and results should be confirmed with field trials. A number on a datasheet is a comparison, not a guarantee about your specific load.
The EPAL figures, and what is missing from them
EPAL publishes two numbers for the Euro pallet: a safe working load of 1500 kg, and a maximum of 5500 kg on the bottommost pallet when laden pallets are stacked on a solid, even surface.
Two things follow that are worth knowing.
First, you will very often see 4000 kg quoted instead of 5500 kg for stacking. That figure comes from older specifications and stricter stated conditions. EPAL's own current figure is 5500 kg; treat 4000 kg as a conservative value tied to particular conditions, and do not present it as EPAL's.
Second — and more important — EPAL does not publish a racking figure at all. The widely circulated "1000 kg racking load" for a Euro pallet is an industry convention, not a published EPAL specification. If your racking design depends on it, that is a thin foundation for a safety calculation.
Load distribution changes the answer substantially. Commonly cited graduated figures for the Euro pallet are roughly 1000 kg for a load that is not uniformly distributed, 1500 kg uniformly distributed across the deck, and up to 2000 kg for a compact load lying flush over the entire surface. The pallet did not change; only how the weight is spread.
The practical rules
- Design racking on the racking figure, never the static one. If a supplier will not give you a racking figure, that is itself information.
- Watch concentrated loads. ISO defines a concentrated load as one over less than half the top deck. A dense item on a small footprint can exceed local capacity while sitting well under the pallet's rated total.
- Check plastic pallets carefully. Their static and dynamic ratings often exceed wood, but racking capacity varies enormously — roughly 500 to 1750 kg depending on whether steel reinforcement is fitted. A cheap plastic pallet can have half the racking capacity commonly assumed for a wooden Euro pallet.
- Ask what temperature the rating applies at. Catalogue figures are room-temperature figures. For cold stores this matters, and it is a fair question to put to any supplier.
- Remember it is a used-pallet question too. A rated capacity describes a pallet in good condition. A cracked board or split block changes the calculation, which is why inspection and load rating are the same conversation.
If you are specifying pallets for racking or automation, tell us the support conditions rather than just a weight — the span between beams changes the answer more than the tonnage does.
