An employee was driving a tri-axle dump truck, delivering a load of stone to a customer at a camp ground. The employee raised the bed of the dump truck 2-3 feet and then went to observe the load. He noticed the load was unbalanced and was causing the truck to lean to the driver's side. The employee got back in the truck and started to lower the bed. At that point, the telescoping rod that raises and lowers the truck bed broke. This caused the truck to tip over onto the driver's side. The employee climbed out of the passenger side and down a ladder. The employee was hospitalized for a fractured T-12 vertebrae.