OSHA Accident Investigation · Summary #14393268

HEAD,MAINTENANCE,SIGNALMAN,COLLAPSE,CRANE BOOM,WORK RULES,CONSTRUCTION,STRUCK BY,FALLING OBJECT,INATTENTION

1985-08-20T00:00:00

Event: HEAD,MAINTENANCE,SIGNALMAN,COLLAPSE,CRANE BOOM,WORK RULES,CONSTRUCTION,STRUCK BY,FALLING OBJECT,INATTENTION
Linked inspection: No inspection record linked to this accident's victims.
Summary number: 14393268
Report ID: 625700

Event description

Employee killed when struck by crane boom

Investigation abstract

Employee #1 was standing atop a 160-ft-high by 33-in.-diameter silo in a cement d into the pipe handrail, causing the boom to collapse and fall. The boom struck Employee #1 on the head, killing him. storage terminal, giving signals to a crane. The crane, which had a 160-ft-long main boom and a 50-ft-jig, was fitted with a scraper device. The H-shaped scrape r was constructed of 8-in.-diameter pipe with a 20-ft-long center piece made of two 10-ft-long pieces, perpendicular to the smaller pipe. The scraper was lowere d through a hole in the top of the silo and raised and lowered to loosen cement powder that had stuck to the sides of the silo. Apparently the scraper was lower ed too far and cement powder broke loose from the sides, covering the scraper wi th approximately 35 ft of cement. This pulled the jig boom forward about 3 ft an

Victim

#1 Fatality Age 22 M

Nature of injury
12

Part of body
13

Event type
1

Source
24

Occupation code
999

Human factor
11

Environmental factor
6

Task assigned
1

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