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Near-miss: Dropped object

A member has reported a near miss incident in which a turnbuckle pin weighing approximately 2kg fell more than 12m to deck. The incident occurred on a third party construction support vessel used for pipe laying. The vessel has a gutter to guide the flexible pipe into the vertical tensioner. It is able to slew left and right to allow the flexible pipe to approach from various angles. This gutter was to be held in place using a combination of turnbuckle, chain and shackles (see photographs below.) Whilst installing the turnbuckle securing arrangement, the retaining pin of the turnbuckle was dropped more than 12m to deck. There were no injuries.

Using the DROPS Calculator as a benchmark in the classification of the potential consequences of a dropped object, our member determined that the outcome of dropping the turnbuckle pin could have resulted in a fatality

Location of turnbuckle pin
Location of turnbuckle pin
Where the turnbuckle pin fell from
Where the turnbuckle pin fell from
Securing of shackle pins used at height with wire
Securing of shackle pins used at height with wire
Securing of shackle pins used at height with wire
Securing of shackle pins used at height with wire
Securing of shackle pins used at height with wire
Securing of shackle pins used at height with wire

Our member investigated the incident and as a result implemented a simple secondary securing method to prevent dropped objects.

Members may also find useful information from dropsonline.com

Members’ attention is drawn to the following IMCA material which may be of assistance:

Safety Event

Published: 26 October 2012
Download: IMCA SF 11/12

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