Abstract: At approximately 11:30 a.m. on January 23, 2014, Employee #1, a framer employed by Timber Ridge Framing Inc., was performing interior carpentry at a residential structure being constructed. He was positioned on the top plate of a second-floor wood-framed wall consisting of 2 by 4 pieces of lumber. The wall height was 9 feet from floor to top plate. From this position he was handling several pieces of 2 by 4 lumber measuring 9 feet in length, moving them from his left to his right into the floor area of a loft. The 2 by 4's would be used to build the walls of the loft area. As he handled the lumber, Employee #1 lost his balance and fell 9 feet to the wood sub-floor. Emergency services were called, and Employee #1 was transported to Sharp Memorial Hospital, where he was admitted and treated for a serious back injury. Employee #1 required hospitalization for several days. This event was reported to Cal/OSHA at approximately 2:45 p.m. on January 24, 2014. During the subsequent investigation, it was determined that the employer was a framing contractor specializing in residential wood frame construction.