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Person injured when chain hoist container failed at securing point

What happened?

An overhead electric chain hoist container/box weighing approx. 30kg fell around 0.8m onto a crew member. The incident occurred whilst crew were working on adjustment of a heavy clamp used as part of a pipelaying operation. A permanently installed 3.2 Te SWL overhead electrical chain hoist, mounted above on a structural beam, was being used to support the clamp end.  One of the securing points of the hoist failed, and the chain hoist container fell onto one of the crew present. It hit the right shoulder/back, causing contusion and bruising.

Hoist chain container attachments points
Failed/fatigued attachments points
Position of injured person before the event  
Position of injured person when the chain container box fixings failed and struck him (reconstruction)

What went wrong

  • An improvement/alteration of the chain hoist container had been carried out locally without proper engineering calculation for the change (the original bag removed and a sheet metal box had been added);
  • There was inadequate engineering/design: secondary DROPS retention had not been considered;
  • There was inadequate maintenance/inspection: the inspection of exterior container was in the planned maintenance system, but it lacked important detail such as fixing point and wear.

Actions taken

  • If you are required to make a change to a component, communicate this change with your supervisor/engineer to ensure the correct method and/or Management of Change is being applied;
  • Amend planned maintenance system to include regular inspection of the chain container to ensure hardware (brackets, links, fasteners and other supports) are in good condition and replace any parts of hoist showing wear or damage – BEFORE using the hoist;
  • Check of any similar hoists elsewhere; install secondary retention where required.

Members may wish to refer to:

Safety Event

Published: 27 March 2024
Download: IMCA SF 07/24

Relevant life-saving rules:
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