OSHA Accident Investigation · Summary #14555098
MORRISON-KNUDSEN CO INC
SAN FRANCISCO, CA—
Event description
Employee killed when struck by falling cushion block
Investigation abstract
A crane supporting a diesel-powered pile driver was located on a floating barge. on. Employee #1 and a coworker removed a used cushion block from the hammer helmet. A new laminated 24 in. square by 12 in. thick plywood block was pressed into th e helmet and bridge spikes driven into it. The hammer was then raised approximat ely 50 ft into the leads in preparation to lift a second pile driver on top of t he first pile. The employees were standing on the drop leads, preparing to remov e a protective aluminum block from the splice plate, when the bottom 4 1/2 in. o f the new cushion block delaminated below the bridge spikes. The piece fell, bou nced off the lead webs, and struck Employee #1 on the head. He died that afterno
Victim
-
#1 Fatality Age 28 M
- Nature of injury
- 6
- Part of body
- 13
- Event type
- 1
- Source
- 24
- Occupation code
- 999
- Human factor
- 6
- Environmental factor
- 6
- Task assigned
- 1
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.