Cranes Relocation
Crane relocation requires careful analysis of the crane structures and the behaviour
of the vessel under different sea conditions. Crane structures normally require
strengthening for journeys at sea. Lashing arrangement has to be carefully designed
to avoid any damage to the crane, which can arise from excessive stresses encountered
during the voyage or excessive welding or heating in the lashing arrangement.
The fork lift method of loading and shipping has become the most popular method
of transporting quay side container cranes. With proper understanding of the procedures
and careful planning, this method is both fast and safe, and presents minimum disruption
to the operation of the terminal.
For long sea journeys, this is the preferred way. The vessel is ballastable for
Ro - Ro operation or is equipped with heavy lift cranes for lifting the RTGs.
Tug and Barge
Feasible for shorter sea voyage up to about 6000 KM. Lashing arrangement has to
be ridgid and robust to cope with rolling, pitching motions of the barge in the
high seas. Loading and unloading is by means of roll on/roll off or by means of
floating cranes.
Floating Crane
Pick and carry method , normally applicable over a short distance within the harbour.
The entire relocation exercise involves decommissioning the RTG, pre-shipping preparation,
loading, lashing, insurance survey, unloading, and re-commissioning of the equipment.