Abstract: At 8:45 a.m. on March 1, 2017, Employee #1 and Coworkers #1 and #2, employed by a construction subcontractor, were working at a multiemployer project, a residential building renovation. They were performing exterior carpentry work to the third floor of the house. Coworker #1 heard a scream from below. Employee #1, who reportedly was working from a scaffold and removing nails from a wall, had fallen through the scaffold's inboard edge opening, a fall height of 20 feet. Emergency services were called, and Employee #1 was transported to the hospital. He was admitted and treated for three rib fractures, fractures to two vertebrae, and lung bruising.