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The health and safety hub for the aggregates, asphalt, cement, concrete, dimension stone, lime, mortar and silica sand industries.
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Fatal 5 - Failure of wire rope on rising skip

LOCATION:
CONCRETE PRODUCTS PLANT
ACTIVITY:
LIFTING
SUB ACTIVITY:
NO SUB ACTIVITY AVAILABLE
ALERT STATUS:
Normal
DATE ISSUED:
01/02/2022 18:46:36
INCIDENT No:
03605

TITLE
Fatal 5 - Failure of wire rope on rising skip
COUNTRY OF ORIGIN

WHAT HAPPENED

During the normal operation of the casting skip, the skip had begun its ascent. During its climb, the slack wire rope switch triggered and sounded. At this point the rope snapped on both sides and the skip fell to the bottom of the pit. It is not known whether the skip had reached its full height, however the skip was still full of aggregate so had not got to the stage of emptying.

This caused considerable damage and downtime. Other similar incidents have occurred with processing equipment on different sites over the last 12 months.

Following an investigation, the following points were revealed

  • The wire rope had been rubbing on the side of the plates housing the rope and the skip wheels.
  • Over a period of time, this could have caused the rope to become damaged, hence both ropes snapping at the same time.
  • Ordinarily, the design is such that should one rope fail the other will hold the skip and prevent it falling.
ACCIDENT / INCIDENT IMAGES
Click image to enlarge

Broken wire
Click image to enlarge

Where the wire rope was rubbing

LEARNING POINTS / ACTIONS TAKEN


  • Ensure a robust PPM in place for inspection and replacement of ropes within all types of manufacturing equipment, both for safety of people and production equipment.

  • Ensure a Statutory Inspection undertaken for safety critical ropes

  • On inspection of the ropes, check for wear due to rubbing and engineer out any problems if identified.

  • Ensure a robust lubrication process is in place for ropes and wires


LEARNING POINTS / ACTIONS IMAGES
Click image to enlarge

LOCATION:
CONCRETE PRODUCTS PLANT
ACTIVITY:
LIFTING
SUB ACTIVITY:
NO SUB ACTIVITY AVAILABLE
ALERT STATUS:
Normal
DATE ISSUED:
01/02/2022 18:46:36
INCIDENT No:
03605


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