Safety Flash
Rigging failure – Clump weight dropped to seabed
Rigging failure – Clump weight dropped to seabed
- IMCA
- Safety Flash
- IMCA SF 33/20
- Crane and RiggingDropped ObjectsLifting OperationsManagement of Change
- Dropped objectsMechanical failure
- Anchor handlingLifting operationsRigging
- Lifting accessories
- Lifting planManagement of changePre-use checks
- Marine industry
- Subsea
Summary
A weather buoy’s 2.6-tonne clump weight dropped to the seabed after a chain link failed during deployment. The selected weight exceeded the design’s 450 kg allowance, and the chain was unsuitable for lifting. The flash recommends formal management of change, thorough lift planning and checks of rigging certification and suitability.
Classifications: Dropped objects; falling objects; DROPS.
Classifications: Mechanical failure; equipment failure.
Classifications: Anchor handling; anchor deployment.
Classifications: Lifting operations; load lifting; hoisting.
Classifications: Rigging; slinging.
Classifications: Lifting accessories; lifting gear; rigging gear.
Classifications: Lifting plan; lift planning.
Classifications: Management of change; MOC; change management.
Classifications: Pre-use checks; pre-use inspection.
Classifications: Marine industry; shipping industry; maritime sector.
Classifications: Subsea; underwater worksite.
Summary
An unsuitable chain failed while deploying an overweight mooring component, dropping a 2.6-tonne clump weight to the seabed.
IMCA SF 33/20. Themes: crane and rigging, dropped objects, lifting operations, management of change.