Abstract: On July 26, 2011, Employee #1 and Employee #2, employed by Iron Industries, Inc., a steel erection contractor, were working to construct a building at the new College of the Sequoias campus near Tulare, CA. They were assisting in the erection of a new classroom building measuring approximately 33 feet wide, 44 feet long, and 19 feet high. The steel fabricator welded onto the steel upright columns some erection aids to help erect and plumb the building before welding the joints. Two of the erection aids were not welded properly to the upright columns, and they broke loose when the steel trusses were set on the aids as a coworker was winching the building plumb. Employee #1 and Employee #2 were near the aids when the aids failed, and the steel structure hit them. They both suffered injuries and were taken to Kaweah Delta Medical Center, Visalia, CA, for treatment. Employee #1 was hospitalized with unspecified injuries. Employee #2 was treated for a fracture and released. The incident was reported to Cal/OSHA by the employer on July 26, 2011.