Leenaars Marine and Offshore design has developed a movable shear leg gantry crane for offshore operations. The shearleg gantry crane has a capacity of 7,000t and can be repositioned along a rail on the vessel’s deck through a push-pull system. This allows for optimal use of deck stowage capacity without compromising the crane’s outreach.
The crane has four blocks that can be moved independently of another, enabling the crane to easily lift a wide variety of equipment, oftentimes without modifying lifting points or the need for custom made spreaders. When this crane is positioned on a simple barge of sufficient dimensions good workability can be obtained. A cheaper simplified version of this crane is available that is fixed in position for inland use.
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