OSHA Accident Investigation · Summary #14300651
HAWAIIAN CRANE & RIGGING LTD
KAHUKU, HI·
Event description
CRANE BOOM COLLAPSE
Investigation abstract
ON DECEMBER 3, 1985, AT APPROXIMATELY 10 AM., A CREW OF 18 WORKERS WAS LIFTING A D FELLTO THE LEFT, AWAY FROM THE TOWER. THE LOAD CABLES GLANCED OFF THE TOWER. T HE LOAD WAS RELEASED TO PREVENT THE CRANE FROM TIPPING. THE BOOM AND LOAD COLLAP SED TO THE GROUND. THREE HIGH VOLTAGE 4 KV ELECTRIC LINES WERE STRUCK AND BROKEN AT THE JOB SITE PERIMETER. SOME HEAVY EQUIPMENT DAMAGE OCCURRED. NO WORKERS WER E INJURED. WIND TURBINE TO THE TOP OF A 114 1/2' HIGH TOWER, USING A 200 TON TRUCK MOUNTED CRANE WITH A 180 FOOT LONG BOOM. THE LOAD WEIGHT WAS APPROXIMATELY 44 TONS. WEA THER CONDITIONS WERE CLEAR WITH GROUND WINDS MEASURED AT 20 - 25 MPH, WITH GUSTS TO 30 MPH. THE OUTRIGGERS WERE FULLY EXTENDED AT 24', SET ON SOLID GROUND OVER STEEL ROAD PLATES. THE LIFT WAS MADE OVER "THE REAR", WITH 4 TAG LINES IN USE. T HE BOOM ANGLE WAS 80 DEGREES, WITH A 35 FOOT RADIUS. AFTER REACHING THE TOP OF T HE TOWER THE LOAD WAS SWUNG TO THE RIGHT, OVER "THE SIDE", AND HELD. THE CRANE O PERATOR WAS SIGNALLED TO BOOM UP WHEN THE CRANE STARTED TO TIP. THE BOOM AND LOA
Victim
-
#981 Degree 0 Age 0
- Nature of injury
- 0
- Part of body
- 0
- Event type
- 0
- Source
- 0
- Occupation code
- 0
- Human factor
- 0
- Environmental factor
- 0
- Task assigned
- 0
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