Barge crane lift in Holland was ‘inherently unstable’

26 July 2016

The technical investigation into a dramatic double crane collapse has found that it should never have been attempted. Two onshore hydraulic cranes were being used on a transport barge, to lift a bridge unit into place. However, perhaps because the lift location was in very sheltered inland waters, there was insufficient consideration of barge stability effects during the planning stage – in particular of the crane boom stiffness.

The investigation report, on behalf of the Dutch Safety Authority, is a good reminder for anyone involved in offshore lifting on floating units that onshore lifting equipment and practices cannot simply be used without change.