A field guide to every class of dump truck and aggregate trailer — what it carries, where it shines, and when to book it. If you haul bulk material, this is the vocabulary of the job.
| Type | What it is & best use |
|---|---|
| Tandem-axle dump | Two rear axles (6 wheels driving). ~13–15 ton payload, agile on tight residential and small commercial sites. The workhorse for smaller loads of dirt, sand, and gravel. |
| Tri-axle dump | Three rear axles for higher legal payload (~15–20 tons in many states). The most common heavy dump for aggregate, base, and fill on construction and road jobs. |
| Quad-axle dump | Four rear axles spread the load for the highest single-truck payload. Popular where state bridge-formula rules reward more axles. |
| Super dump | A tri/quad with a trailing ("Strong-Arm") liftable axle that extends the wheelbase to legally carry far more — up to ~26 tons in some states — then lifts when empty. |
| Transfer dump | A powered dump truck pulling a separate aggregate "transfer" trailer whose box slides into the truck body to dump. Two loads, one driver — great for high-volume hauls. |
| Articulated dump truck (ADT) | Off-road, 6x6 pivot-steer haulers for mass excavation, mines, and rough sites where highway trucks can't go. Not for public roads. |
| Straight (single-axle) dump | Smaller, nimble trucks for tight sites, landscaping, and smaller material drops. |
| End-dump trailer | A tractor pulling a frameless or framed trailer that tips at the rear. High capacity for aggregate, spoil, and millings on open sites — needs overhead clearance to dump. |
| Belly-dump / bottom-dump trailer | A trailer that drops material through gates in the belly, laying an even windrow while moving. Ideal for spreading base and stone on road jobs. |
A straight dump truck carries its bed on its own frame — quicker to maneuver, best for tighter sites and shorter hauls. A tractor + dump trailer (end-dump or belly-dump) separates the power unit from the load, carrying much more per trip — best for high-volume material moving on open jobs and longer lanes.
More axles spread weight across more of the road, so states (via the federal bridge formula) allow more total weight. That's why a quad-axle or super dump legally out-carries a tandem. Your real payload also depends on the truck's own weight, the material's density, and state permits.
Browse verified carriers by equipment type, or list your own truck free.
Find Trucks List Your Truck