The problem it solves
Metro Detroit ships parts in returnable containers: plastic, metal or wood boxes that cycle between a supplier and a plant. The system works until it does not. A launch runs long and the fleet is out in the field. A lane is added and nobody ordered containers for it. A fleet is damaged, or a container pool comes up short for a few weeks. The parts still have to ship.
An expendable pack covers the gap. It is one-way packaging, usually corrugated. A used gaylord is the least expensive and fastest version of it, and a triple-wall gaylord is the usual backup for a parts container. The catch is fit: the backup has to match the returnable's footprint and carry the same standard pack quantity, the number of parts the customer's packaging spec puts in one container, or racks, trucks and the receiving dock stop working.
What to send us
| Send | Why we need it | Where to find it |
|---|---|---|
| Pallet footprint | Fit to racks, trucks and the receiving plant | The customer packaging sheet or the returnable's label |
| Inside height | How many parts stack in one box; decides wall count | The sheet, or measure the returnable inside |
| Standard pack quantity | Keeps the count per container the same | The packaging spec |
| Gross weight | Checks the wall count against the cited capacity | The sheet, or weigh a loaded container |
You do not need part numbers. A footprint and a weight are enough to start, and the spec checklist covers the rest.
Why corrugated is the usual answer
Automotive packaging for ocean containers is generally one-way, because returning it costs too much. The longer the logistics leg, the less practical returnable packaging becomes, and spare parts shipped to service centers usually go one-way in expendable packaging. At least one large corrugated maker sells expendable triple-wall for overseas automotive shipments in place of returnable plastic containers or metal racks.
That is the lane we cover on the export page. For a shortage rather than a lane, read covering a returnable shortage. For the logic of choosing one over the other, read expendable vs returnable packaging.
Facts and figures
- Automotive packaging for ocean containers is generally one-way (expendable) because returning it costs too much (Automotive Logistics, January 13, 2017). (automotivelogistics.media, retrieved 2026-11-11.)
- Packaging Corporation of America offers expendable triple-wall corrugated for overseas automotive shipments in place of returnable plastic containers or metal racks. (packagingcorp.com, retrieved 2026-11-11.)
- The longer the logistics leg, the less practical returnable packaging becomes, and spare parts shipped to service centers usually go one-way in expendable packaging. (macfarlanepackaging.com, retrieved 2026-11-11.)
Terms
- expendable packaging: One-way packaging, usually corrugated, that is not returned to the shipper; in automotive it covers long lanes, export and shortages of returnables.
- returnable container: A plastic, metal or wood container that cycles between a supplier and a plant; gaylords stand in for them when the returnables run short.
- backup pack: The expendable pack a supplier ships when its returnable containers are short; it should match the returnable's footprint and pack quantity.
- standard pack quantity: How many parts go in one container under the customer's packaging spec.
Boxes per trailer for a backup pack
| Box (in) | Height on pallet | Layers under 108 in | Boxes, 26 positions |
|---|---|---|---|
| 48 x 40 x 36 | 42 in | 2 | 52 |
| 48 x 40 x 48 | 54 in | 2 | 52 |
| 48 x 45 x 40 | 46 in | 2 | 52 |
| 46 x 38 x 36 octagon | 42 in | 2 | 52 |
The inputs are a 108 in interior height, 636 in length and 26 pallet positions from ATS trailer guide, retrieved 12 November 2026, with the 6 in pallet from Wikipedia, Pallet, retrieved 12 November 2026. At 52 boxes the cargo weight limit given further down works out to about 810 to 865 lb per box, so a dense part can fill the weight limit long before the space. A returnable that must come back doubles the trips; an expendable backup pack does not.
Pallet limits and border crossings
A standard 48 x 40 x 6 in wood pallet is listed with a dynamic capacity of 1 short ton (Wikipedia, Pallet, retrieved 12 November 2026), so a backup pack loaded beyond about 2,000 lb needs a stronger pallet or a different footprint. For export lanes the sources give scale: the Ambassador Bridge opened in 1929, carries more than a quarter of merchandise trade between the two countries by value and counts more than 10,000 trucks a day, and 2.3 million trucks crossed it in 2024 (Wikipedia, Ambassador Bridge, retrieved 12 November 2026). It connects to I-75 and I-96 on the US side.
Weight on the road
A loaded tractor and trailer is limited to 80,000 lb, and the trailer guide puts the cargo share at 42,000 to 45,000 lb depending on the trailer and commodity (ATS trailer guide, retrieved 12 November 2026). A backup pack of dense parts in 26 pallets averaging 1,600 lb reaches 41,600 lb of cargo before counting the boxes and pallets themselves, which is why heavy parts are usually quoted by weight and light ones by cube.
- Automotive Logistics, ocean container packaging
- Macfarlane Packaging, how to pack automotive parts
- Packaging Corporation of America, heavy-duty parts packaging
- Detroit Regional Partnership, mobility and automotive
In this section
- Returnable shortagesA launch runs long or the returnable fleet comes up short. How a backup pack of used gaylords bridges the gap without breaking the pack spec.
- Export lanesLong lanes and ocean freight rarely send packaging back. Expendable gaylords for export and cross-border parts, and what to send us.
- Pack spec checklistFootprint, inside height, standard pack quantity, gross weight, walls and bottom: the fields to send so a used gaylord matches the pack it replaces.