Incident alert

LOCATION:
CEMENT
ACTIVITY:
MAINTENANCE & HOUSEKEEPING
SUB ACTIVITY:
N/A
ALERT STATUS:
Normal
DATE ISSUED:
20/12/2010
INCIDENT No:
00277

TITLE
Eyebolt Mismatched Nuts
COUNTRY OF ORIGIN
United Kingdom
ACCIDENT / INCIDENT DETAILS
A silo was in the process of being dismantled for relocation elsewhere. On lifting down a section of shell plate, the lifting eyes pulled out of their fixing nuts and the plate fell 5 metres to the ground.

No persons were injured as the area 'was no entry' to pedestrians during the lift.

The reason for the failure was a mismatch of equipment; the eyebolt had been purchased separately from the nuts and had been sold as size M20. However, the eyebolt was actually M18 and the nut purchased was M20.
ACCIDENT / INCIDENT IMAGES
Click image to enlarge



LEARNING POINTS / ACTIONS TAKEN
Risk assessments, safe systems of work and associated documents have been reviewed. The double shackle is now the preferred lifting method.

Eyebolts should be checked for size, which is stamped on the neck of the bolt and slack nuts should be checked for during the rigging operation.

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LEARNING POINTS / ACTIONS IMAGES




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