Abstract: At approximately 1:20 p.m. on December 1, 2006, Employee #1, a welder, was welding a tilt-up wall panel during the construction of a commercial building. At the time of accident, he was preparing to weld a 6-inch by 3-inch by 3-inch piece of angle iron at a height of approximately 13 feet. He was securing two panels from a 16-foot extension ladder leaned against the south wall. At the same time, the operator of a John Deere skid steer loader, Model Number 317, was grading a 10-foot wide by 91-foot long area below the wall panel. As Employee #1 was positioning himself to weld, the ladder was struck by the loader that was backing up, causing Employee #1 to fall with the ladder. He suffered a compound fracture of his right knee and was transported to San Antonio Community Hospital, where he was hospitalized for eight days.