Miner was standing on an extension ladder his feet were on 5th rung approximately 5 to 6' off the ground. He was welding just above the ladder on the back of the kress truck. The ladder slipped out from under him. He sprained his Rt. wrist trying to catch him self. Miner stated he failed to tie off the ladder or use the bed platform. Miner was put on restricted duty.
U.S. Mine Safety and Health Administration