OSHA Accident Investigation · Summary #607416
COLLAPSE,CRANE BOOM,TRUCK CRANE,CONSTRUCTION,CRANE,UNSTABLE LOAD
Event description
TRUCK CRANE BOOM COLLAPSED, CAUSING NO INJURIES
Investigation abstract
A 140 TON LINK-BELT FMC 238A TRUCK CRANE WAS BEING USED TO LIFT THE CENTER COLUM 970, SECTION 9.8, OR SAFETY FACTOR OF 4 AS REQUIRED BY ANSI A10,9 - 1983, SECTIO N 9.3.3. THERE WAS SIGNIFICANT PUBLICITY AND PROPERTY DAMAGE FROM THIS ACCIDENT. THE CONCRETE COLUMN HAD BEEN MANUFACTURED AT THE COMPANY'S PRESTRESS CONCRETE P LANT. N OF A PARKING GARAGE UNDER CONSTRUCTION. THE COLUMN WAS 72 FEET LONG AND WEIGHE D 60,900 POUNDS. TWO LINES WERE BEING USED; ONE WAS RIGGED TO A LARGE LIFTING LO OP AT THE TOP OF THE COLUMN AND THE SECOND WAS RIGGED TO THE THIRD AND FIFTH EMB EDDED SIDE LIFTING LOOPS. THE COLUMN HAD BEEN LIFTED AND WAS BEING "ROLLED" FROM A HORIZONTAL TO A VERTICAL POSITION WHEN THE FIFTH LIFTING LOOP BROKE OFF, CAUS ING THE COLUMN, ALONG WITH THE 150 FOOT CRANE BOOM, TO FALL INTO A DOWNTOWN INTE RSECTION. THERE WERE NO INJURIES. THE LIFTING LOOP WHICH BROKE DID NOT HAVE A SA FETY FACTOR OF AT LEAST 5 TIMES THE WORKING LOAD, AS REQUIRED BY ANSI A 10.9 - 1
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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