What does a quad-axle dump truck look like?

A quad-axle dump truck, also known as a tandem-axle dump truck, has four axles. The front two axles control the steering and the rear two axles are used for carrying and dumping the load. The rear axles are fitted with a hydraulic hoist that allows the bed of the truck to be raised and lowered, dumping the load. The bed of a quad-axle dump truck is typically made of steel and can be either open-top or covered.