Safety Flash
Serious incident: topsides started swinging during lifting
Serious incident: topsides started swinging during lifting
- IMCA
- Safety Flash
- IMCA SF 27/21
- Crane and RiggingLifting OperationsLine of FireStructural and Asset Integrity
- Line of fireStructural and asset integrity
- Lifting operationsRigging
- CraneLifting accessories
- Lifting plan
- Marine industry
- Vessel
Summary
A topsides became unstable and lifted prematurely while connected to pre-tensioned rigging, with personnel on the substructure and crane vessel. The flash identifies incomplete assessment of pre-tension, crane-tip movements and post-cut stability, and stresses expert verification and consideration of monopod stability sensitivity in future work.
Classifications: Line of fire; struck-by hazards.
Classifications: Structural and asset integrity; asset integrity; structural integrity.
Classifications: Lifting operations; load lifting; hoisting.
Classifications: Rigging; slinging.
Classifications: Crane; cranes.
Classifications: Lifting accessories; lifting gear; rigging gear.
Classifications: Lifting plan; lift planning.
Classifications: Marine industry; shipping industry; maritime sector.
Classifications: Vessel; aboard ship; onboard vessel.
Summary
An incident involving unstable topsides that started swinging during a lifting operation.
IMCA SF 27/21. Themes: crane and rigging, lifting operations, line of fire, structural and asset integrity.