Abstract: At approximately 3:00 p.m. On February 19, 2004, Employee #1 and five coworkers were installing trusses on the second floor of a two-story residential building. One of the coworkers was located on the ground rigging trusses to a crane, while Employee #1 and four coworkers were located within the trusses, of the second story, waiting to receive the trusses for installation. The trusses measured approximately 35-feet long by 8-feet tall and were rigged at the top center point of the truss. As Employee #1 stood on the backside of the house within the trusses, the crane began to lower a truss into place. When the truss was about 4 to 5 feet from being set on the top plate of the house, it broke at the center and struck Employee #1 in the arm. He fell 25 feet to the ground. Employee #1 was hospitalized at a shock trauma center and treated for a cut on his left hand and a fractured spine and hip.