OSHA Accident Investigation · Summary #686998
HETTINGER WELDING INC
GILLETTE, WY·
Event description
Employee killed when struck by walking beam
Investigation abstract
Employee #1 had been contracted to remove a tail bearing housing on a National 4 56 oil pumping unit, type D325b-456DW. He stopped the unit, secured the walking beam with chains, then climbed up to the walking beam and walked down to the tai l bearing housing. He had removed the U bolts and nuts when the walking beam rot ated. The rear position swung downward, contacting an upright Sampson post, whic h caused the four saddle bolts at the pivot point to fail. Employee #1 fell to t he base of the unit and was struck by the falling walking beam and killed. Causa l factors include not securing the down chain on the front of the walking beam i n order to prevent it from sliding down the beam.
Victim
-
#1 Fatality Age 30 M
- Nature of injury
- 21
- Part of body
- 5
- Event type
- 1
- Source
- 43
- Occupation code
- 999
- Human factor
- 1
- Environmental factor
- 6
- Task assigned
- 1
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