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Occupational Safety and Health Administration OSHA

Accident Report Detail

Accident: 201271756 - Three Employees Are Killed In Tower Collapse

Accident: 201271756 -- Report ID: 0418300 -- Event Date: 09/04/2003
InspectionOpen DateSICEstablishment Name
30692961309/04/20031799Doty-Moore Tower Service, Inc.
On September 4, 2003, Employees #1 through #3 were at the 700 ft. level on a 1,000-ft-tall, three legged, guyed broadcast tower modifying it to conform to EIA/TIA standard 222-F. Horizontal braces had been installed to enhance the structural strength of the tower. A 160-ft-long gin pole that moves on a track had been assembled at or about the 700 ft. level on the tower. When the track on the gin pole was being raised by a base-mounted drum hoist, the tower collapsed, killing Employees #1 through #3. The investigation determined that the base blocks for the load line and jump line had been attached to the tower at the 35-foot level as opposed to the industry practice of attaching them at the concrete tower base or to an independent anchor. Also, the hoist was at an angle from the face of the tower that resulted in torsional forces beyond those which the tower could withstand.
Keywords: anchor, communication tower, collapse, work rules, hoist, tower
End Use Proj Type Proj Cost Stories NonBldgHt Fatality
Tower, tank, storage elevator Other $500,000 to $1,000,000 1000 X
Employee # Inspection Age Sex Degree Nature Occupation Construction
1 306929613 Fatality Other Occupation not reported FallDist:
FallHt:
Cause: Temporary work (buildings, facilities)
FatCause: Collapse of structure
2 306929613 Fatality Other Occupation not reported FallDist:
FallHt:
Cause: Temporary work (buildings, facilities)
FatCause: Collapse of structure
3 306929613 Fatality Other Occupation not reported FallDist:
FallHt:
Cause: Temporary work (buildings, facilities)
FatCause: Collapse of structure

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