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Occupational Safety and Health Administration OSHA

Accident Report Detail

Accident: 126008770 - Employee Killed When Struck By Post-Tensioning Device

Accident: 126008770 -- Report ID: 0950632 -- Event Date: 08/12/1999
InspectionOpen DateSICEstablishment Name
12600877008/12/19991791Quality Reinforcing Inc
On August 12, 1999, Employee #1 was operating an Owatonna post-tensioning device, model B, serial # 333487D, at 5,600 psi on a concrete slab. He was releasing the pressure on the 1/2 in. cable that ran through the concrete slab when the concrete fractured and the post-tensioning device lost its base footing. Employee #1 was bending over the device when it jackknifed up and struck him in the head. Although he was wearing a hard hat, he was killed. Causal factors of the accident were (1) the failure of the concrete, despite the fact that it had been strength-tested and was apparently strong enough to tolerate this operation; and (2) the improper position taken by Employee #1 in leaning over the device, which placed him in the danger zone should the machine fail.
Keywords: clearance, concrete slab, head, work rules, construction, equipment failure, struck by, flying object
End Use Proj Type Proj Cost Stories NonBldgHt Fatality
Commercial building New project or new addition $5,000,000 to $20,000,000 3 X
Employee # Inspection Age Sex Degree Nature Occupation Construction
1 126008770 Fatality Fracture Miscellaneous hand working occupations FallDist:
FallHt:
Cause: Stripping and curing concrete
FatCause: Struck by falling object/projectile

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