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Occupational Safety and Health Administration OSHA

Accident Report Detail

Accident: 202088241 - Employee Is Crushed And Killed By Falling Counterweight

Accident: 202088241 -- Report ID: 0524700 -- Event Date: 07/09/2007
InspectionOpen DateSICEstablishment Name
30944838907/09/20071541Mosser Construction Inc.
At approximately 8:45 a.m. on July 9, 2007, Employee #1 was helping to disassemble a crane. Employee #1 took out the three bolts that secure the rear counterweight to the middle counterweight and was loosening the second counterweight's bolts from under the super structure. Another employee was standing directly behind the crane assisting in the operation, stated that they had not been trained in the assembly and or disassembly of the crane, and did not consider the bolts being removed a hazard. The operator of the crane leading the disassembly stated he did not know Employee #1 had taken the bolts off the counter weight and was working on releasing the gantry crane on the back of the crane to secure the counter weight. The operator's manual states that the counter weight should have been secured to the gantry before the bolts had been removed and/or loosened. The rear counter weight fell off striking Employee #1. Employee #1 was crushed by the eight-ton rear counter weight from the HC-80 Terex American crawler crane and was killed. .
Keywords: boom, counterbalance, crushed, disconnecting means, untrained, crane
End Use Proj Type Proj Cost Stories NonBldgHt Fatality
Sewer/water treatment plant New project or new addition $1,000,000 to $5,000,000 4 X
Employee # Inspection Age Sex Degree Nature Occupation Construction
1 309448389 Fatality Amputation Truck drivers, heavy FallDist:
Cause: Erecting structural steel
FatCause: Crushed/run-over by construction equipment during

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