OSHA Accident Investigation · Summary #14449417
RAINBOW, INC
MAPLEWOOD, MN·
Event description
CONSTRUCTION EMPLOYEE INJURED WHEN BOOM COLLAPSED
Investigation abstract
AT APPROXIMATELY 12 NOON ON APRIL 28, 1987 EMPLOYEE #1 WAS SANDBLASTING INSIDE A T THE BREAK POINT, CAUSING ADDITIONAL STRESS ON THE WELD. EMPLOYEE #1 SUFFERED A CRACKED PELVIS BONE. WATER STORAGE TANK ABOUT 30 FEET ABOVE THE BOTTOM OF THE TANK. HE WAS SITING ON A METAL BOATSWAIN CHAIR ATTACHED TO A "WHIRLEY GIG" BOOM WHICH EXTENDED 47 1/2 FEET FROM THE TANK CENTER. THE BOOM CONSISTED OF 10 FOOT ALUMINUM SECTIONS WELDE D TO CONNECTION PLATES. A WELD BROKE ABOUT 30 FEET FROM THE CENTER POINT, CAUSIN G THE BOOM TO COLLAPSE. EMPLOYEE #1 FELL ABOUT 30 FEET TO THE BOTTOM OF THE TANK . A LIFELINE, SAFETY BELT AND LANYARD WERE USED. HOWEVER, THE EMPLOYEE FORGOT TO TAKE UP THE SLACK WHEN HE REACHED THE WORKING ELEVATION. A BUTTERFLY CLAMP WAS USED ON THE LIFELINE. ALSO, ABOUT 350 POUNDS OF HOSES WAS DRAPED OVER THE BOOM A
Victim
-
#1 Hospitalized Age 33 M
- Nature of injury
- 12
- Part of body
- 14
- Event type
- 5
- Source
- 24
- Occupation code
- 558
- Human factor
- 9
- Environmental factor
- 13
- Task assigned
- 1
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