How much gravel can a dump truck carry?

Dump trucks come in many sizes and configurations. Additionally, once you start getting into tri-axles, quad axles, quints, centipedes, and 'superdumps', laws between states tend to vary greatly as to what they'll allow for weight limits.

A single axle Class 7 truck which a GVWR of 33,000 should be able to haul eight tons. Some states may allow a higher gross weight on secondary roads. For a tandem, 14 - 15 tons would be the norm with a GVWR of 54000 lbs.