Abstract: At approximately 5:20 a.m. on November 1, 2010, Employee #1, a mechanic with All Air Mechanical Contractors, Inc., was working on the remodeling of a Costco Wholesale Store. To remove a rotisserie hood, he was directed up a fixed ladder to a mezzanine area. He passed through an access door and stepped onto a suspended ceiling above the rotisserie. He fell through the ceiling approximately 12 ft to the floor. Employee #1 was hospitalized for foot and ankle fractures. The suspended ceiling was covered with dust at the time of the incident, making it hard to distinguish between it and the solid mezzanine floor.