The amount of material a dump truck holds depends on the size of the dump truck, and the type of material dictates the number of tons. For example, a cubic yard of sand weighs 2.2 tons. A typical garbage dump truck holds about 9 tons of trash.
The largest dump trucks are mining trucks that are more than two stories high with diesel engines that weigh more than 12 tons. These massive dump trucks hold a maximum payload of 400 tons.
According to the North Carolina Department of Transportation, small dump trucks can carry up to 7 tons of salt, and larger dump trucks hold between 8 and 9 tons. Each of the department's dump trucks measures 19.5 feet in length.