Benefits of using lashing chains with Dyneema®
For the Beatrice Offshore Windfarm in Scotland, synthetic link chains with Dyneema® were used to move the 336 foundation piles to the site more efficiently. The challenge was the tight timetable.
The piles were transported on barges from three locations, one in Germany and two in the Netherlands. Fixing the piles securely for the journey required lashing chains 16 meters long, with a minimum breaking load (MBL) of 20 tonnes. Made of steel, each chain would weigh 64 kilogrames. Synthetic chains with Dyneema® weigh just 10.2 kilogrames at the required MBL of 20 tonnes. Their use enabled the crew to simply throw the synthetic lashing chains over the piles, from one side of the barge to the other, instead of using a crane – saving time and money and improving safety.
Dyneema® fiber will also be crucial in delivering the cutting-edge floating foundation technology necessary to keep moving wind farms further from shore and into deeper waters.
The Windfloat Atlantic project, which incorporates the largest and most powerful wind turbines ever installed onto a floating foundation at sea, was initially launched five years ago using a steel chain-based mooring system. However, after encountering limitations during installation and dismantling, the latest phase of the project will use mooring lines with Dyneema® DM20. Their use is delivering major efficiencies, making it easier and more economically viable to install and operate windfarms in inaccessible sites.