Eggs don’t come out of a house in neat, matching sizes. In the same collection run, you’ll see medium, large, extra-large, and jumbo mixed together.
That mix is where tray fit starts to matter. When trays are built around smaller eggs, bigger eggs don’t sit right. They can get squeezed at a few contact points or sit too high in the cell. Either way, normal stacking, moving, and loading can start damaging shells. You often don’t notice it until later at grading, but the problem usually starts much earlier with the carrier.
The goal isn’t to “handle damage better” downstream. It’s to avoid creating it in the first place. When one tray can handle the full size range, you don’t need extra sorting steps or workarounds. You just move eggs the way you already do without the built-in loss.
Where Egg Damage Really Happens
Most egg damage isn’t random. It follows a few common patterns that come down to how the shell sits in the tray.
Bruises and cracks can form when a large egg gets pinched in a cell that’s too small. The pressure lands in the wrong spot, and the shell takes the stress where it’s more likely to fail. Even routine starts, stops, and turns can be enough to do it.
Hairline cracks show up when an oversized egg rides high. If it’s above the cell edge, it can tap lids, dividers, or neighboring eggs. The crack might be hard to see at the house, but it can turn into leaks and downgrades once the egg hits processing equipment.
In both cases, the tray isn’t “holding” the egg so much as creating the conditions for damage during everyday handling.
Why "Almost Fits" Creates Problems
A tray that mostly fits large eggs is often worse than it looks.
If the cell is a little shallow or a little narrow, the egg sits high and takes impacts in the wrong place. Vibration affects it more. Shock loads hit harder. And when mixed sizes are stacked, the loads don’t travel evenly through the stack. Some eggs are squeezed too tightly, while others can move around, which makes the whole column less stable.
That’s why “it works for most eggs” doesn’t always hold up in real production. Healthy flocks produce variation, and carriers have to handle that variation without turning normal movement into damage.
The Right Carrier Design for Real Production
For most operations, the simplest answer is a tray that’s made to cover the mixed-size reality: a 30-cell tray rated for medium through extra-large, up to around 90 grams.
The key is the cell shape. A good design supports the shell in the right contact bands, leaves clearance where it needs to, and keeps eggs seated consistently across sizes. That way, smaller eggs stay secure, and larger eggs aren’t squeezed or riding high.
Systems like the DuraPlas Egg Transport System are built around that idea, one tray that can handle mixed sizes without forcing extra steps or extra rules.
Stacking also matters. A six-high stack standard keeps columns consistent, which helps reduce lean and shifting during transport. Interlocks that keep stacks aligned after bumps and handling can also help prevent the slow “creep” that leads to damage.
How Operations Get Simpler
When one tray works for the full mix coming out of the house, collection gets simpler.
Crews don’t have to stop and decide what goes where. Training is easier because the process is consistent. Material flow is cleaner because you’re not juggling multiple tray types for the same run.
And if the tray system works with existing pallets and handling equipment, improvements don’t have to come with a major facility overhaul. You can get better protection without rewriting your whole operation.
As Better Design Pays Off
The biggest difference usually shows up during high-volume periods. When things are moving fast, small fit issues turn into real damage. Better tray geometry doesn’t change your day-to-day handling, but it does make that handling less punishing on the egg.
You also tend to see second-order benefits. Better positioning can help automated systems work more consistently, which can reduce rework and manual sorting.
The Bottom Line Impact
Carrier fit is one of those small things that scales fast. A small reduction in cracks and downgrades becomes meaningful when you multiply it across daily volume.
A properly rated 30-cell tray that supports up to 90-gram eggs and stacks six-high matches real flock variation. It keeps eggs seated the way they should be, keeps stacks stable, and helps stop bruises and cracks where they start—back at the house, not at the grading station.
