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Occupational Safety and Health Administration OSHA

Accident Report Detail

Accident: 202448064 - Employee'S Arm Fractured By Falling Headache Ball

Accident: 202448064 -- Report ID: 0950633 -- Event Date: 01/04/2008
InspectionOpen DateSICEstablishment Name
31060183602/26/20081623Albert W Davies Inc
At approximately 9:30 a.m. on January 4, 2008, Employee #1, of Albert W. Davies, Inc., was working at a site in Rancho Cucamonga, CA. He was working in a pit close to where a foreman was operating a 35 ton, 1972 Grove RT65S hydraulic boom-type rough terrain mobile crane, serial #39159, with a 34 ft to 136 ft boom. The foreman was using the main four-part line to lift an approximately 200 lb piping spool into the pit. When he extended the boom, the auxiliary whip line two-blocked, then snapped. The headache ball and hook separated at the wedge socket and fell into the pit, fracturing Employee #1's left forearm. He was transported to Arrowhead Regional Medical Center, where he was treated for 11 days. Although at the time of the accident the multi-part main line was equipped with a two-block damage prevention device, the auxiliary line was not.
Keywords: fracture, unsecured, mobile crane, construction, struck by, two-blocking, arm, falling object, headache ball, crane
End Use Proj Type Proj Cost Stories NonBldgHt Fatality
Pipeline New project or new addition $50,000 to $250,000
Employee # Inspection Age Sex Degree Nature Occupation Construction
1 310601836 Hospitalized injury Fracture Construction laborers FallDist:
Cause: Trenching, installing pipe
FatCause: Struck by falling object/projectile

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