Recent near-miss incidents involving potential dropped objects
There have been several recent cases of potential dropped objects which have been brought to IMCA’s attention by the Marine Safety Forum in MSF Safety Flashes 11-20 (marinesafetyforum.org/upload-files/safetyalerts/msf-safety-flash-11.20.pdf)and 11-22 (marinesafetyforum.org/upload-files/safetyalerts/msf-safety-flash-11.22.pdf).
Case 1: Unusual Potential Dropped Object
During positioning of a container on an offshore rig, a large lump of what appeared to be road tar was seen within one of the forklift pockets of the container. The lump measured 30 x 15 x 5cm and weighed 1.2kg. The container, which had forklift pockets on all four sides, had been on a round trip to the rig, gone back ashore and had been taken back to the rig before the hazard was spotted, some two weeks after its original despatch. The investigation could not determine at what point the lump of tar entered the forklift pockets but it could not have been at the supplier nor at the supply base, both of which have fully concreted yard surfaces. Therefore, it is possible that it was present for some time prior to the container’s original despatch.
It is presumed that being sticky, the lump of tar was lodged against the top of the inside of one of the forklift pockets, only eventually becoming dislodged due to some form of shock to the container. This made it difficult for the supplier to spot and remove. It is also presumed that it was in one of the transverse forklift pockets and therefore invisible to gantry checks at the supply base.
Case 2: Potential Dropped Metal Piece
A vessel completed discharging a cargo of 20 inch uncapped casing to an offshore installation after a period of adverse weather. During ‘routine’ operations on the installation a piece of metal, a D-ring plate cover, was found inside one of the discharged joints of 20 inch casing. The drops calculator classed the potential as a fatality if the object were to have been dropped from more than 2.4metres.
Members are encouraged to be vigilant in checking for all potential dropped objects. Whilst the probability of items sticking to the top of the inside of forklift pockets is low, the impact of those items falling out and causing harm is high. Provision for checking for and removing such items might include:
- Use of mirrors and lights on extended poles;
- Use of brushes and sweep-through;
- Safe systems for doing checks at eye height to assist ergonomics.
Case 3: Potential Dropped Metal Piece
Several days after the object in Case 2 was discovered, on the same installation, a wooden wedge was found inside another 20 inch joint of casing. The drops calculator classed the potential as a fatality if the object were to be dropped from more than 3.7 metres.
Two of the above-mentioned objects (Case 2 and Case 3) were identified as belonging to the vessel and had become lodged inside the casing due to the vessel shipping water on deck during rough weather conditions. Subsequently, all wooden wedges used on this particular vessel were painted white on their top sides to make them easier to see in the dark.
Members are reminded of IMCA’s safety promotional material on avoiding dropped objects:
- Avoiding dropped objects (pocket card)
- Avoiding dropped objects (poster)
- Dropped object prevention – www.dropsonline.orgIMCA SEL 05/11
Published: 27 July 2011
Download: IMCA SF 08/11
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