Abstract: At approximately 11:40 a.m. on March 13, 1986, Employee #1 was standing alongside a truck, watching a crawler crane lift a load. The procedure was for the crane to pick up the load from the truck, have the truck pull out, and then set the load down. The load, which was almost at the crane's capacity, was lifted slightly off the truck to check for stability. The truck prematurely moved forward and caught the corner of the load, pulling the crane boom sideways. The boom collapsed and one or more of the wire running ropes struck Employee #1 on his hard hat and on the side of the head. He was hospitalized.