Safety Flash
Dropped sheave and clump weight
Dropped sheave and clump weight
- IMCA
- Safety Flash
- IMCA SF 21/24
- Dropped ObjectsLifting OperationsLine of FireSimultaneous Operations
- Dropped objectsHuman factorsLine of fireMechanical failure
- Lifting operations
- CraneWinch
- Exclusion zonesOperational supervisionSimultaneous operations coordinationStop-work authority
- Offshore wind
Summary
During wind turbine monopile installation, a clump weight was hoisted into a sheave, breaking it and dropping both components onto the deck. No injuries occurred, but equipment damage and a hydraulic oil spill resulted. The flash highlights simultaneous winch operation, inadequate observation, absent automatic stops and lessons on lift oversight and stopping unsafe work.
Classifications: Dropped objects; falling objects; DROPS.
Classifications: Human factors; human performance; ergonomics.
Classifications: Line of fire; struck-by hazards.
Classifications: Mechanical failure; equipment failure.
Classifications: Lifting operations; load lifting; hoisting.
Classifications: Crane; cranes.
Classifications: Winch; winches.
Classifications: Exclusion zones; red zones; restricted access zones.
Classifications: Operational supervision.
Classifications: Simultaneous operations coordination; SIMOPS; simultaneous operations.
Classifications: Stop-work authority; stop work; stop-work intervention.
Classifications: Offshore wind; offshore wind energy.
Summary
A high potential dropped object incident occurred when a sheave weighing 204kg fell 64m to deck.
IMCA SF 21/24. Themes: dropped objects, lifting operations, line of fire, simultaneous operations.