Rack inspections look at uprights, beams, connectors, safety pins and baseplates. They are the parts that carry a rating, the parts that get damaged by forklifts, and the parts that appear on every checklist.

The part almost nobody inspects is the one directly under the load: the pallet.

Which is odd, because in a selective racking bay with open beams, the pallet is a structural component. It is what turns a stack of cartons into something a pair of beams can carry, and when it is in poor condition it changes the load path in ways that the racking was never designed for.

What the beam rating actually assumes

A beam pair is rated for a load spread across it, not for a load sitting on two small patches. That assumption is doing a lot of work, and it is the pallet that delivers it: the bottom deck boards and the bearers spread the weight along the beam instead of concentrating it.

Take away the spreading and two things change. The beam sees a heavier point load than it was rated for, and the deflection at mid-span goes up. Deflection matters more than people expect, because catalogue beam ratings are governed by deflection limits as much as by strength — a beam that visibly sags under load is telling you something long before anything fails.

None of this means a warehouse with a few tired pallets is about to collapse. It means the safety margin the racking was designed with is being spent quietly, in a place nobody is looking.

The four pallet faults that matter, in order

1. Missing or broken bottom deck boards. This is the one. On open beams the bottom boards are the bearing surface. Lose one and the load transfers through whatever is left, usually at the ends of the bearers, exactly where the pallet is weakest. On a heavy pallet the failure is not the beam — it is the pallet folding.

2. Split or cracked bearers. The bearers are the thick timbers running through the middle of the pallet, and they are what bridges the gap between the two beams. A split bearer has lost most of its bending capacity while looking almost normal from the front. This is the fault you find by looking at a pallet from the side, which is why it is rarely found.

3. The pallet placed the wrong way round. A pallet has a direction. Its bearers have to run across the beams, front to back, so that they bridge the two beams. Turn the pallet ninety degrees and the bearers run parallel with the beams, which means the only thing spanning the gap is the deck boards. Two-way entry pallets make this easy to do wrong, because a forklift can only enter from two sides and an operator turning the load to suit the truck has just turned the structure as well.

4. Overhang and undersize. A pallet longer than the beam depth overhangs at the front or back, which puts load outside the bearing line and makes it easy to knock. A pallet smaller than the beam gap is worse — it can sit on nothing at all. Where a bay carries several pallet footprints, that is a configuration question as much as a housekeeping one, and mixing pallet sizes in selective racking covers how to set the bay up so it is not left to whoever is driving that morning.

Timber, plastic and the cold room

Timber pallets are the common case and they age visibly: nails back out, boards crack, corners get crushed by forks, and a pallet that has been rained on and dried repeatedly is not the pallet it was.

Plastic pallets behave differently. They deflect more under a static load than timber does and they keep deflecting slowly under sustained load, which is a real consideration for a pallet that goes up in January and comes down in December. They also become less forgiving at low temperature.

Cold storage compounds all of it. Timber taken into a chiller carries moisture in and out, and freeze-thaw cycling at the joints does over a year what handling does over five. What actually changes in cold room and chiller racking covers the rest of that environment.

The load on top of the pallet counts too

Two pallets with identical weights can present completely differently to a beam. A load stacked within the pallet footprint and shrink-wrapped down to the pallet behaves as one object. A load overhanging the edges, or stacked high and unwrapped, is a different problem: it catches on the frame during placement, it shifts, and it puts load where the deck boards are thinnest.

Drums, coils and rolls deserve a special mention because they concentrate weight into small contact patches by their nature — why pallet racking is the wrong shape for them sets out what to do instead.

The fix that removes the whole problem

If you cannot control pallet quality — and most operations genuinely cannot, because pallets arrive with the goods — then stop relying on them structurally. That is what decking is for.

Wire mesh decks, steel panels or timber boards across the beams mean the load bears on a continuous surface rather than on two boards of unknown condition. It also stops anything falling through, which is the other half of the argument. The choice between them is not free, particularly under sprinklers: steel panel, wire mesh or chipboard sets out what each does and where each one is ruled out.

Decking is not universal. Plenty of well-run warehouses store pallet loads on open beams safely, because they control what goes up. The point is that it is a choice between two strategies, and running open beams with uncontrolled pallets is not one of them.

A check that takes no extra time

The useful moment is at the point of putting away, because the pallet is already off the ground and in front of someone.

1. Look at the side of the pallet, not the front. Split bearers show from the side.
2. Bottom deck boards present and unbroken. Any missing board means it does not go up at height.
3. Bearers running across the beams, not along them.
4. Load inside the footprint and wrapped to the pallet, not just to itself.
5. No protruding nails or lifted boards — those catch forks and become the next damaged pallet.

And the operational rule that makes the check real: a suspect pallet does not go up at height. Put it at ground level where a failure means a spill rather than a fall, transfer the goods to a sound pallet, and take the bad one out of circulation. A quarantine corner for damaged pallets costs one bay and prevents the argument entirely.

Where this belongs in inspection

Formal rack inspection is about the structure, and it should stay that way — the pallet is not a rack component and it does not belong on that form. But the same walk is a good moment to look up and notice what is being stored on what, because a pattern of tired pallets at height is a housekeeping finding worth writing down. The inspection checklist covers the structural half.

The other thing worth doing on that walk is checking that the load notices still match reality, since a bay's rating is only useful if it is visible where the decisions are made — see rack load notices and the sign your warehouse is probably missing.

The short version

1. On open beams the pallet is a structural component, and nobody inspects it.
2. Beam ratings assume the load is spread. A broken pallet stops spreading it.
3. Missing bottom boards, split bearers, pallets turned the wrong way and undersized pallets are the four faults that matter.
4. Plastic deflects more and keeps deflecting; cold storage ages timber faster.
5. If you cannot control pallet quality, deck the levels.
6. A suspect pallet stays at ground level. Always.

If you want yours looked at

Tell us what you are storing, on what pallets, and how high. If the honest answer is that your bays need decking rather than a bigger beam, we will tell you that — it is usually the cheaper fix.

We do not publish racking prices, because a meaningful figure depends on your SKU mix, handling equipment, clear height and floor. We survey, tell you what is wrong with the plan first, and quote against a scope. Everything is fabricated in our own Singapore workshop and installed by our own crew.

Message us on WhatsApp about pallets and racking safety, or see the racking systems we install.