Pallet pattern is the least glamorous part of produce packaging and one of the most expensive to get wrong. The difference between a box footprint that divides cleanly into a euro pallet and one that does not is a handful of units per layer — which multiplies by layers, pallets, and weeks until it is a truck.
It is also a decision that locks itself in. Once a grower has packed to a pattern for a season, changing the crate means changing the packing line, the stack heights, sometimes the cold store racking. Worth thirty minutes before the first order.
Start with the pallet, not the box
The euro pallet is 800 × 1200 mm. The useful question for any candidate box is: what are all the ways this footprint tiles that rectangle, and how much edge waste does each leave?
Divide the pallet dimensions by the box dimensions in both orientations and write down the combinations. A 400 × 300 box gives 2 × 4 = 8 per layer with no waste. A 380 × 280 box — only slightly smaller — tiles badly, and you will fit fewer units while shipping more packaging. The apparently smaller box is the worse choice.
This is why the common crate footprints are what they are. They are not arbitrary; they are the footprints that tile European pallets and fit European retail display units. Deviating from them should require a reason, not just a preference.
Interlocking patterns: mostly a trap
Turning alternate boxes 90 degrees (a pinwheel or interlock pattern) can squeeze in an extra unit per layer and improves stack stability by keying the layers together. It also has a cost that is easy to miss: interlocked stacks carry less vertical load, because the columns of boxes are broken at every layer.
For a light, short journey that trade can be right. For a tall stack of dense produce going into a cold store for weeks, column-stacked patterns with aligned boxes carry load far better. If your stack is limited by crushing rather than by height, keep the columns straight and accept the slightly lower unit count.
Height, and the thing people forget
Boxes per pallet is not just per layer — it is layers, and layers are limited by three things, of which two are usually forgotten:
- Crushing. The bottom box must survive the full stack under the worst temperature it will see. Produce boxes warm up, soften slightly, and stacks that were fine in February fail in July.
- Cold store clearance. Racking beams and door heights. A pallet that is 10 mm too tall for the rack is a pallet that goes on the floor, and floor storage costs space you were already using.
- Airflow. In forced-air cooling, the pallet wrap and the pattern affect how air moves through the stack. A tighter pattern with fewer gaps cools more slowly.
Stability in transit
A pallet that arrives with the top two layers collapsed has delivered fewer usable units than a pallet with a conservative pattern, no matter what the loading calculation said. Three things improve stability more than anything else:
- Lids or top frames that spread the load from the layer above
- Corner boards on tall stacks
- Strapping or wrap tension appropriate to the produce — enough to stabilise, not enough to crush
Rigid plastic crates tolerate strapping better than fibre; they do not creep under it. That is one of the quieter advantages when stacks travel long distances.
How to settle it
Take your top three candidate footprints and lay them out physically — chalk on the floor is fine. Count units per layer for both aligned and interlocked patterns, then stack to the intended height and measure the crush margin on the bottom box at your worst-case temperature.
Then multiply the best pattern by your annual pallet count. The difference between a good and a mediocre pattern is usually big enough to justify spending an afternoon on it.
If you send us your pallet spec, box size candidates and stack height, we can run the patterns and tell you which footprint gives you the most units without gambling the bottom layer.