Articulated dump trucks are relative newcomers to the heavy construction ... It was a simple unpowered trailer, and it dumped by drawing the trailer axle toward the tractor, thus forcing the front of ...

Maryland, for example, allows dump trucks to carry 55,000 pounds if they have three axles and 70,000 pounds if they have three axles plus a lift axle. Snowy Doe, who works at the Mack Truck Museum ...