Pallet specification for a plant you have not built yet
In short
Pallet footprint determines rack beam spacing, aisle width, conveyor dimensions, dock door count and effective storage density. Deciding it at design stage costs nothing; deciding it at commissioning means either accepting a compromised layout or rebuilding something expensive. The questions that need answering are about the product and the handling method, and they can be answered long before a building exists.
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What the footprint actually determines
| Design element | Driven by | Cost to change later |
|---|---|---|
| Rack beam length and spacing | Pallet footprint and load width | High — re-beaming a facility |
| Aisle width | Pallet depth plus handling equipment turning radius | Very high — floor layout |
| Storage density per square foot | Footprint and overhang | Very high |
| Conveyor width and roller pitch | Bottom deck geometry and footprint | High |
| AS/RS bay dimensions | Footprint and height tolerance | Extremely high |
| Dock door count | Pallets per trailer and throughput rate | High |
| Trailer loading pattern | Footprint against 98-in interior width | Free — but only if the footprint suits it |
The questions that can be answered before the steel arrives
- What is the product, what does a unit load weigh, and how is that weight distributed?
- Does the load overhang any standard footprint? Measure a real one, filled and settled, not a drawing.
- Does it go into racking, and for how long? That sets the racked rating and the creep derate.
- Is handling manual, automated, or mixed — and will that change within the building's life?
- Does anything export? That decides treatment and adds kiln time to every lead time.
- Do pallets come back, or leave permanently? That decides owned versus pooled versus expendable.
- What is the throughput rate in pallets per hour? That, with pallets per trailer, sets dock count.
- Who receives the product, and do they have a footprint requirement of their own?
Eight questions. None requires a building. All of them are cheaper to answer on paper than to discover during commissioning, and most of them are things the operations team already knows.
Build a mock-up
The single most useful thing we do at design stage is build one to five prototype pallets and send them to be loaded with real product. It takes five to seven business days and it consistently catches things no drawing does — the case pattern that leaves a corner unsupported, the bag that slumps three inches further than anybody expected, the deck gap the small carton drops into.
Appendix: the data behind this
Every piece on this site closes with the slice of our operating record that bears on what it argues. The full record is published at /resources/operating-record.
Footprint against equipment, before the steel is ordered
Rack beam spacing, aisle width and dock count all follow from the row you pick here. Pick it at design stage and it is free.
| Footprint | 53-ft van | 48-ft van | 40-ft container | 20-ft container | 45-ft HC | Empty, 53-ft |
|---|---|---|---|---|---|---|
| 48 × 40 | 28 | 24 | 20 | 10 | 24 | ~560 |
| 48 × 48 | 24 | 22 | 18 | 9 | 22 | ~480 |
| 42 × 42 | 26 | 24 | 20 | 10 | 24 | ~600 |
| 36 × 36 | 39 | 33 | 30 | 14 | 34 | ~700 |
| 48 × 45 | 26 | 22 | 18 | 9 | 22 | ~520 |
| 1200 × 800 | 30 | 26 | 25 | 11 | 28 | ~520 |
| 1200 × 1000 | 24 | 22 | 20 | 10 | 24 | ~460 |