OSHA Accident Investigation · Summary #14291314
EJECTED,FRACTURE,WORK RULES,OVERLOADED,CONSTRUCTION,EQUIPMENT FAILURE,NECK,CONTUSION,CRANE,OVERTURN
Event description
Crane operator killed when thrown from overturning crane
Investigation abstract
Employee #1 was using a Drott 2500 Cruz-Crane, serial #154, to position a 40,000 y what he had heard, and then began to stand up. Suddenly the crane cab broke lo ose from the carriage, turning on its right side with such force that the operat or was ejected. He landed on his upper body, approximately 20 ft from the crane' s carriage. Employee #1 sustained multiple fractures, including cervical disc fr actures and massive chest contusions. He was killed. A check of the crane load c apacity chart indicated that there was an overload factor of approximately 6,000 lb. A metallurgical analysis of the turntable area indicated stress faults in t he turntable ring and in some of the bolts fastening the cab to the carriage. Ap parently the lift was opposite the faulty area of the turntable, which, combined with the overload factor, resulted in this accident. -lb concrete mixer onto some heavy timber dunnage. Coworkers were on the ground guiding the mixer into place. The crane was level, with its outriggers fully ext ended on pads of heavy 12-in. by 12in. timbers and all four wheels completely of f the ground. According to the boom angle indicator, the boom was extended 50 ft at a 71 degree angle. The mixer was supposedly out over the right front outrigg er (approximate radius of 19 ft 6 in.), although eyewitnesses stated that the mi xer was actually touching the outrigger. The mixer was approximately 6 in. off t he ground when a loud pop was heard. Employee #1 looked around trying to identif
Victim
-
#1 Fatality Age 49 M
- Nature of injury
- 12
- Part of body
- 20
- Event type
- 5
- Source
- 27
- Occupation code
- 849
- Human factor
- 6
- Environmental factor
- 8
- Task assigned
- 2
Codes shown verbatim from OSHA's accident-investigation database. A human-readable decoder is coming in a future release once the accident_lookup2 dictionary is loaded.