Mega Jack raises 13,000t topside

For a cost-effective load-out onto the barge, the topside needed to be jacked-up over 10m so it could be placed on the specially designed desk support frame for the load-out.

The Mega Jack was the most viable option as limited site space meant there was a need to avoid any disruption to other site operations.

“As the Mega Jack had its own starter beams, extensive time and cost savings were made as the client did not need to fabricate temporary beams,” ALE added.

The topside, weighing over 13,000t, was jacked-up to 14m high in stages. Upon reaching the first jacking phase 5.5m high, the client could access the forklifts under the topside, which was a major advantage as they could continue operations and optimise the project schedule.

Once at the full height of 14m, the desk support frame could then be installed underneath and jacked down ready for the load-out.

For the jacking operation, ALE configured the Mega Jack with eight towers, each with 5,200t capacity. This provided the strength needed to lift such a heavy weight whilst evenly distributing the ground loading pressure.

Teun Van Gorp, project manager for ALE who specialises in the Mega Jack system, said: “It is fantastic to be involved in such a unique project. As the Mega Jack is much more effi cient than other systems on the market, with quicker assembly and jacking speeds, it provided a smart solution that saved time and overall costs.

“The Mega Jack was also a safer option for us operating in a busy site, as its inherent contingencies reduced the overall ‘critical operation’ and no working at height or welding connections were required.

“By using a world-leading jacking structure such as this, the client saved money by not investing in fabrication, which also gave them the long-term competitive edge. We are really happy with the achievements so far and are preparing for the next phase.”

This is part of a full offshore service contract where ALE is executing the weighing, jacking, loadout and installation of the topside, jacket and platform.

The next stage will involve the load-out and the offshore installation.