Jumbo has transported two Ship-to-Shore Kalmar cranes, combined with a total of seven knocked down RTG’s from Taicang, China, to Cartagena, Colombia, for Cargotec. Since the STS cranes were too big to handle in their fully assembled shape, both cranes were shipped in parts to fit Jumbo Javelin’s deck and cargo hold. https://www.swzonline.nl/fotoverslag/61[Visit the photo album for more pictures of the operation].
The crane structures, weighing up to 1,000 t per piece, reached 80 m above deck and protruded 30 m on starboard side of the vessel. The lower portal and upper structure of the first crane were lifted and placed on deck separately. The complete middle piece of the second crane was lifted on deck at once in a tandem lift.
Special Support Structures
Because of the cranes’ width, height and weight and to remain within all safety margins during the voyage, Jumbo and Cargotec had to engineer special support and sea fastening structures on deck and at the outside of the vessel. On top of this, the upper structures needed to be tilted to make sure it did not hit the water during sea transport.
Avoiding Waves and Wind
With its SPOS and Octopus systems and cooperation with Meteo Consult Jumbo calculated the best sea route to avoid high waves and strong winds. With the cranes protruding on starboard side, the roll movement of the Jumbo Javelin had to be minimised.
