Lifting Aid Designed by TWD for Decommissioning of Royal Sovereign Lighthouse by HERBOSCH-KIERE
Decommissioning an offshore structure is always a unique challenge – and the Royal Sovereign Lighthouse provided an example for the history books. The lighthouse was permanently taken out of service on March 21, 2022.
Engineers from TWD, the Rotterdam based engineering company specialized in method engineering and equipment design, assisted HERBOSCH-KIERE Marine Contractors Ltd with determining the method of decommissioning and designing the required temporary works.
The DP2 Heavy lift vessel Gulliver from Scaldis, was contracted for the topsides lift. To remove the topside, TWD designed a lifting aid consisting of a spreader frame on top, a support frame at the bottom, and post-tensioned Dywidag bars running along the topside’s core connecting the two frames. TWD also designed a separate frame to secure the topside during cutting.
TWD congratulate HERBOSCH-KIERE on the safe and successful removal of the topside. The two companies continue their cooperation, as they continue working together on the second and final phase of the project – the removal of the pillar.
Featured Title photograph
Photo credit: Herbosch-Kiere/Maritime Filming UK