Transportation and installation of offshore rig legs
Weight: 240T, Length: 72m, Width: 2.5m
Four offshore leg structures had to be transported from their fabrication yard within a short time period to the port where they had to be installed on to the rig. The main challenge here was to transport the abnormally long rig legs through narrow bending roads full of unavoidable obstacles.
We used 2 file wide, 18 axle Goldhofer conventional multi-axle trailers configured with turntable bolster attachments for the transportation. Upon reaching the destination the legs were top and tailed upright using our Liebherr 600T crawler crane as the main crane and our 250T Kobelco crawler crane as a tailing crane completing a successful transport and installation within a record time.
To find a custom solution to top and tail the complete fabricated structure and align it with the base jacket structure.
A selection of 3 cranes were used. Our Liebherr 600T crawler crane with 84.0M boom SDBW was used as the main crane, a 400T crawler crane with 64.0M boom and our Liebherr 1200T mobile crane were used as tailing cranes to successfully top and tail the entire structure and then carefully position it over the base structure for welding.