Abstract: On June 15, 2009, an employee and a coworker were removing damaged wood from the bottom side of a concrete slab that was suspended above them. The concrete slab measuring approximately 5 ft by 7 ft was approximately 4 inches thick. The coworker exited the area under the slab to move the accumulated wood away from the working area. The employee continued to remove the supporting structure for the slab but did not replace the damaged wood with cribbing or jacks. During the removal operations the structural supports failed causing the concrete slab to fall onto the employee. The employee was crushed and killed. The responding Fire Department Rescue crew estimated its weight of the concrete slab to be about 1,000 pounds.