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What happened?
A large hot air duct weighing 6 tonnes was being lifted.
The hot air duct was slightly tilted when lifted but within margins, and loading was continued.
A worker asked for work to stop, but this was overruled by a supervisor.
When the load was 1.5m (5ft) above deck and under the control of taglines from the riggers, the lifting sling slid towards the centre of gravity (COG).
One side of the load bounced onto the deck, while the load was still hanging in the rigging.
The rigging was not damaged, and no one was injured.
The damaged hot air duct was sent onshore for repairs.
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Why did it happen?
The COG of the load and lifting markings were wrongly marked on the tarpaulin, leading the crew to believe it was an engineered lift.
The tarpaulin did not give any friction to the sling or rigging.
Saddles were loose due to poor construction.
‘Stop work authority’ was not followed, and no risk assessment was made after the STOP call.
Unclear communication – no one knew who was in charge of the operation and too many people interfered with the lift.
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What did they learn?
Ensure the COG and lifting markings are accurate.
Discuss the standard operating procedure before starting the job. Establish who will be in charge and what are the responsibilities.
Ensure ‘stop work authority’ is followed. Workers should be confident to trigger the procedure.
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Ask yourself or your crew
Have you ever been involved in an incident like this?
How can you check that the lifting markings are accurate? Why is it important to do this?
What other checks should you perform before lifting operations?
How can you trigger a stop work procedure, and what are the steps?
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Published on 16/04/21
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A large hot air duct weighing 6 tonnes was dropped during lifting operations. The rigging was not damaged, and no one was injured. The damaged hot air duct was sent onshore for repairs.
