Semi-Trailers: dimensions & payload capacity
Interior cargo dimensions and payload for US and European semi-trailers: 53ft and 48ft dry vans, reefers, flatbeds, step decks, lowboys, and the 13.6 m European artic.
Interior cargo dimensions in inches; payload is maximum cargo weight, not gross vehicle or gross container weight. Figures are the published specifications of the manufacturer, carrier, or standards body linked on each row, and vary by make, model, and year. Treat them as planning numbers and confirm the specific unit before you load it.
About these numbers
The 53ft dry van is the single most common piece of cargo space in North America, and almost everything about a shipment is designed around it: 630 in of interior length, about 100 in between the walls, and 110 in of height under the roof bows. Twenty-six standard pallets fit on the floor in two rows, which is where the familiar 26-pallet figure comes from. Everything else on this page is a variation on that theme. A reefer loses a few inches all round to insulation and the evaporator, so a 53ft reefer plans at about 630 x 98 x 105 in. A flatbed trades the walls for the ability to load from any side and crane over the top, and its height figure is a legal load height rather than a physical ceiling. A step deck drops the rear deck to buy roughly a foot of load height, and a double drop or lowboy drops it further still for tall machinery. Europe works to different rules: a 13.6 m articulated trailer runs to about 536 x 98 x 106 in, a mega trailer pushes interior height close to 3 m by lowering the deck, and a curtain-sider keeps the enclosed dimensions while opening the whole side for forklift access. Freight brokers, production managers, and shippers use these numbers to decide between equipment types, check whether a load cubes out before it weighs out, and lay out a deck plan before the trailer backs in.
Frequently asked questions
- What are the interior dimensions of a 53ft trailer?
- A 53ft dry van gives roughly 630 x 100 x 110 in of interior space (52 ft 6 in long, 8 ft 4 in wide, 9 ft 2 in high), about 4,000 cubic feet. The nominal 53 ft is the exterior; the front wall and rear door frame cost about 6 in. Practical payload is usually 44,000 to 45,000 lb once the tractor and trailer weight are subtracted from the 80,000 lb US gross limit.
- How many pallets fit in a 53ft trailer?
- Twenty-six standard 48 x 40 in GMA pallets fit on the floor of a 53ft dry van in two rows of thirteen, loaded straight. Turning them 'pinwheel' can get you to 28 in some configurations, and double-stacking doubles the count if the freight and the 110 in of height allow it.
- What is the difference between a flatbed and a step deck trailer?
- Deck height. A flatbed has a single flat deck about 60 in off the ground and can carry a load roughly 8 ft 6 in tall before hitting the 13 ft 6 in legal height. A step deck drops the rear portion of the deck about a foot lower, so it carries the same footprint with roughly a foot more load height, without needing an oversize permit.
- How big is a European 13.6 m trailer?
- A standard European articulated trailer gives about 536 x 98 x 106 in internally (13.62 x 2.48 x 2.70 m) and carries around 24,000 kg. A mega trailer keeps the same length and width but lowers the deck to reach close to 3 m of interior height, which is the usual choice for volumetric freight across Europe.
- What is the maximum payload of a semi-trailer?
- In the US the binding limit is the 80,000 lb gross combination weight, not the trailer itself. Subtract a typical tractor and trailer and you are left with about 44,000 to 48,000 lb of cargo. In Europe the equivalent gross limit is usually 40 tonnes, leaving roughly 24,000 to 25,000 kg of payload.
- What is a lowboy or RGN trailer used for?
- Tall, heavy machinery. A removable gooseneck lowboy drops the deck into a well between the axles, giving the lowest deck height in common road freight and around 140 in of load height, with ratings up to about 80,000 lb. The gooseneck detaches so equipment can drive on from the front.
