Abstract: At approximately 9:15 a.m. on August 26, 2002, Employee #1, a carpenter hired that morning from Local Hall L-944 by Ace Engineering, Inc., was using a rolling scaffold to attach a piece of cosmetic fascia to a large canopy under construction at the site of a sports complex. He was getting his pneumatic nail gun ready to drive in a nail when the scaffold moved backward and overturned. Employee #1 fell approximately 19 ft 8 in., down and across an array of concrete bleachers. He sustained compression fractures of the T-11 and T-12 vertebrae and a concussion. The four casters on the rolling scaffold were not locked.