A five axle All Terrain nearly ended up in the dock on Thursday when it dropped a classic Amsterdam sightseeing boat in the Netherlands.
The crane - a 100 tonne Liebherr LTM 1100-5.2 owned and operated by C&P Kraanverhuur - was lifting the boat, the Eveline, out of the water at a quay in Amsterdam-Noord for dry dock maintenance over winter. The crane was lifting the boat over one of the rear outriggers when it punched through the concrete dock surface revealing a large underground void.
The crane tilted but remained upright as the back end of the boat initially rested in the water, while the front hung up on the dock, with some weight still held by the crane. As everyone recovered from the shock, the web sling at the rear of the boat shifted along the boat relieving the crane of its load almost causing it to flip over rearwards. Once again however, it did manage to remain upright on the dockside.
There were several issues with this incident, but the most critical was the assumption that the surface and construction of the old dock was sufficiently strong enough to support the crane without the need for outrigger mats of any kind. Why anyone would ever set outriggers on a machine of this size without at least putting down the usual on-board mats, in order to at least spread the outrigger loads a little, is hard to fathom. Thankfully no on was seriously hurt and even the boat is repairable.
An overnight salvage operation using two other cranes managed to extract the boat from the water, when its drained and loaded onto the waiting trailer.
The video below shows most of the incident as it occurred.