Guide: Static, dynamic and racking load
Static is the load a pallet holds at rest, dynamic the load it holds on the move, racking the load it holds across an open gap. They are three tests, and the lowest one that applies to your job is the one that counts.
One pallet, three numbers
- Static
- 10,000 lbat rest, evenly spread
- Dynamic
- 4,000 lbon forks, jack or conveyor
- Racking
- 2,000 lbedge rack, open span
Rehrig Pacific 40 x 48 rackable pallet, November 12, 2026.
Request a quoteNest calculator
Why there are three
A pallet is loaded in three different ways in a normal week. It sits on a floor with product on top, it rides forks or a pallet jack to a truck, and it may rest on two steel beams in a rack. Each puts the load through the pallet differently, so each gets its own test and its own number.
On a floor the whole base carries the load, so the pallet holds the most. On forks the load moves, bumps and tilts, so the number drops. On a rack the middle of the deck hangs over a gap and bends, and the number drops again. The three figures on Rehrig Pacific's rackable, 10,000, 4,000 and 2,000 lb, fall in that order, and that order is typical.
How to read them
| Rating | What it describes | When it governs |
|---|---|---|
| Static | Load at rest, on a flat floor, spread evenly | Block stacking, floor storage, the bottom pallet in a stack |
| Dynamic | Load carried by forks, a pallet jack or a conveyor | Every move in a plant or warehouse |
| Racking | Load carried on two beams with a gap between | Any pallet that goes on a rack |
Nelson Company's explainer on capacity ratings makes the same point: ratings are different tests, and a pallet may carry a static figure and no racking figure at all. When a sheet is silent on racking, the pallet is not rated for it.
The pattern across makers
| Pallet | Static | Dynamic | Racking |
|---|---|---|---|
| Rehrig Pacific 40 x 48 rackable | 10,000 lb | 4,000 lb | 2,000 lb edge rack |
| Nelson Company multi-use, 48 x 40 x 4.8 in | 10,500 lb | 3,100 lb | 2,700 lb |
| Nelson Company used one-piece HDPE, 6.3 in | 30,000 lb | 5,000 lb | 2,200 lb |
| Rehrig Pacific heavy-duty nestable | 10,000 lb | 3,500 lb | not listed |
Look at the second column against the first. Dynamic is a fraction of static in every row: 40 percent for the first pallet, about 30 percent for the second, about 17 percent for the third. A pallet with a huge static number does not carry a huge load on forks. This is why heavy-duty claims should always be read against dynamic.
Rules of thumb
- Use the lowest rating that applies to the way the pallet is used.
- If the pallet is on a rack for months, ask about creep as well as racking load.
- If the sheet shows a static number and nothing else, ask for the other two before you buy.
- Ratings assume an evenly spread load. A concentrated load needs a lower number.
A beam load worked out
Take a pallet with a 2,200 lb racking load. A loaded pallet of 1,294 lb uses 58.8 percent of it and leaves 906 lb; one of 2,912 lb is 712 lb over. Rack engineers also apply their own safety margins, so treat the figure as a ceiling.
| Loaded pallet, lb | Share of the racking load | Left over, lb | Within the rating? |
|---|---|---|---|
| 1,294 | 58.8 percent | 906 | yes |
| 1,497 | 68.0 percent | 703 | yes |
| 1,700 | 77.3 percent | 500 | yes |
| 2,003 | 91.0 percent | 197 | yes |
| 2,306 | 104.8 percent | -106 | no |
| 2,509 | 114.0 percent | -309 | no |
| 2,912 | 132.4 percent | -712 | no |
A stack worked out
Take a stackable rated 30,000 lb static. The bottom pallet carries the pallets above it, so with each loaded pallet weighing 2,782 lb it can hold 10 above, a stack of 11. With 6,824 lb per pallet it can hold 4 above. This is a ceiling on a flat floor for a still stack, not a promise for a stack that moves or waits.
| Loaded pallet, lb | Pallets above the bottom | Stack height | Load on the bottom pallet, lb |
|---|---|---|---|
| 2,782 | 10 | 11 | 27,820 |
| 3,289 | 9 | 10 | 29,601 |
| 3,796 | 7 | 8 | 26,572 |
| 4,303 | 6 | 7 | 25,818 |
| 4,810 | 6 | 7 | 28,860 |
| 5,817 | 5 | 6 | 29,085 |
| 6,824 | 4 | 5 | 27,296 |
Words on this page
- Creep
- Slow, permanent bending of plastic under a steady load. A pallet can hold a load for an hour and bow under it after a month.
- Edge rack
- A rack arrangement where the pallet rests on the edges of the beams. It is the common test case for a racking rating.
- UL
- Underwriters Laboratories, a safety testing body that publishes fire test standards, including one for storage pallets.
- Dynamic load
- The weight a pallet holds while it is moved by a forklift, pallet jack or conveyor. It is lower than static because motion adds shock.
- Recycled content
- The share of a pallet moulded from reground plastic. Makers print it as a range, often by colour.
- Closed loop
- A route where pallets return to the sender after delivery, so the empty trip is a standing cost.
- HDPE
- High-density polyethylene, a tough resin used in many plastic pallets, valued for strength against its weight.
- Nest ratio
- How many empty pallets fit in the height of one: pallet height divided by nest increment.
Questions people ask
Which rating matters most?
The one for the way the pallet is used. A floor stack is a static question, a forklift ride a dynamic one, and a rack a racking one. Where the pallet does all three, the lowest governs.
Why is racking lower than static?
On a rack the deck is unsupported in the middle, so the load bends it. On a floor the base supports the whole deck.
Tell us the footprint and how many stacks you move.
We work out the empty trailer, then take the request for a load.