The numerical simulation by our flange expert Filip Wegener illustrates that the tightening sequence, in combination with gaps between the contact surfaces, can lead to a significant loss of preload. The animation clearly demonstrate that the two-stage tightening required in IEC 61400-6/AMD1 is necessary to achieve sufficient preload and that after two rounds preloading to 100% of the design preload, the losses due to this effect are negligible. Enjoy watching! 🎞️

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Show AllHappy Easter
Easter is a good opportunity to pause for a moment.
At JBO Engineering Group, we work every day on offshore wind and complex structures – today can be a little calmer.
We wish our clients, partners and colleagues a relaxing Easter break.
04/2026

Rethinking Floating Offshore Wind: Takeaways from FOWT 2026
The FOWT Conference 2026 provided two days of valuable discussions and insights into the future of floating offshore wind energy.
As a consortium of JBO Engineering Group, sowento, and AMOG, we engaged with experts from around the world to explore technological, economic, and strategic developments in the sector.
FOWT continues to be the international…
03/2026

4. Philippines Onshore Offshore Wind Summit 2026
Two intense and inspiring days in Manila, connecting with engineers, developers, and project teams driving the Philippines’ offshore wind sector forward. It was great to exchange ideas on engineering challenges, local conditions, and upcoming projects alongside REPROCON and ONP Management GmbH.
Walid Al Otaibi, our Managing Director & Director Offshore, shared his insights in…
03/2026

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