The lookout for a competitive alternative to steel slings
From a heavy steel configuration to a lightweight fibre-based lifting solution with Dyneema®
"The drawings showed that the rigging arrangement of the structures weighed around 80 t, but due to some changes in design, the weight had gone up to 170 t. Due to this heavy weight we started looking for alternatives to steel - could Dynamica Ropes help ?"
The significant weight increase created an urgent need for a true alternative to steel slings - a certified, high-performance and offshore-ready solution, capable of reducing total system weight without compromising safety, structural integrity or installation tolerances.
The solution: Dynamica SafeLift Slings
Our R&D team started a dialogue with the customer and together they found the best possible lightweight solution for changing the rigging to the lighter alternative made with Dyneema® - the Dynamica SafeLift Slings used as a rigging arrangement.
“We have very strict requirements in terms of installation tolerances for structures inclination”
Karoline, Global Sourcing Specialist
Instead of relying on conventional steel-based lifting gear, a fibre-based rigging configuration was engineered using Dynamica SafeLift Slings - an advanced alternative to steel slings designed for heavy lifts, subsea installations and offshore critical operations. The transition from steel to ultra-strong synthetic fibre significantly reduced the weight while improving manoeuvrability, safety margins and installation flexibility.
A proven alternative to steel slings with low weight and precise length tolerances
The low weight combined with unique strength made SafeLift Slings the perfect alternative to steel slings and steel wire mooring systems - especially in applications where precision, load stability and weight optimization are critical. While steel has traditionally been associated with robustness and reliability, modern fibre technology demonstrates that performance can be significantly enhanced when focusing on strength-to-weight efficiency and predictable elongation behaviour.
Dynamica provided a customised solution
We manufactured 4 customised SafeLift Slings with a calculated weight of 190 kg in total, in comparison, a similar product made with steel would have weight 1.9 t. Reducing the total weight from 1.9 tonnes to just 190 kg clearly illustrates the performance gap between traditional steel lifting slings and a modern alternative to steel slings. This substantial weight saving influences not only the lift itself, but also transportation logistics, crane utilization, installation time and overall project economics.
To meet the customer requirement for extremely low length tolerance (0.2 % or less) all the rope pennants were Proof Loaded in our 500 t Test Bed according to DNV-ST-N001. The Proof Loading is our guarantee that the heavy duty rope made with Dyneema® can carry the load, which it is designed for. The Proof Loading insures a stable length of the sling and the smallest possible length tolerance in case of multiple lifts.
Dynamica SafeLift Slings with low weight and low length tolerance were successfully used on the Rolvsnes field placed 6 km from the Edvard Grieg offshore field. This was the first subsea tie-back development for the Edvard Grieg.
"Dynamica SafeLift Slings worked well, nice length tolerances and good performance offshore"
Jon, Lead Engineer
