Abstract: At about 8:50 p.m. on September 26, 2013, Employee #1, with Ads Logistic Services - Gaffney LLC, was placing product boxes on a warehouse storage rack (Aisle number: 12; sixth level). Employee #1 was using an order picker (8,834 pounds; Raymond Lifts 5600; Serial Number: 560-08-B8003). Employee #1 was standing on the elevated lift platform, which was about 35 ins. high, while attached by a harness. A coworker was operating a different piece of equipment (17,264 pounds; Raymond Lifts Swing Reach SB CSR30T; Serial Number: SB-08-01454), and struck the lift truck operated by Employee #1. The coworker was traveling at approximately six mph (maximum speed). Employee #1's lift tipped over, and both the lift and Employee #1 struck the concrete. Although properly tied off to the lift, Employee #1 died from blunt force trauma to the head on impact with the concrete floor. Diagnostic testing of the lifts by Raymond Lifts indicated they were both in proper operating condition at the time. A Forklift Training Program, which utilized classroom discussion, video, written test, and a practical skills test, was being followed, as required by the company. Both operators had been recently certified by the host employer (within the past four months) to operate the lifts they were driving. Operators' manuals were available on both lifts. Warehouse lighting was adequate in addition to overhead platform lights, headlights, back up lights, and flashing caution lights on the lifts. The radio-frequency guided lifts were not designed to be able to pass each other on the approximately six ft wide aisle but could travel on the same aisle, simultaneously. Both employees were provided to the host employer through a temporary staffing agency.