Nabralift’s bolted joints can operate for over 25 years without re-tightening.
Nabrawind has received a Design Evaluation Conformity Statement (DECS) from UL Solutions for its Nabralift 3.MAX tower family, in compliance with the international IECRE OD-501 wind turbine certification scheme.
Designed to support wind turbines of up to 8 megawatts, the 3.MAX solution can reach hub heights of up to 210 metres. It represents a significant structural improvement over previous generations — as it can withstand loads up to 30% higher — and expands its compatibility with the vast majority of next-generation turbines now entering commercial operation in onshore wind projects worldwide.
The tower has also received IECRE certification as a maintenance-free structure, a recognition made possible by Nabrawind’s innovative engineering approach. Through the use of advanced design methodologies and calculation techniques, the company has successfully demonstrated that its bolted joints can operate for more than 25 years without the need for re-tightening. This validation is based on a comprehensive process that includes laboratory tests simulating 40 years of operation, as well as monitoring of the first towers installed, which have already accumulated over 30,000 operating hours.
The 3.MAX tower family includes seven modular configurations built from interchangeable frame sections, all compatible with a common transition piece. This modular approach enables the design of logistically viable configurations for practically any hub height, while eliminating the need for large cranes during installation. In the segment of very tall towers — where concrete towers are usually the only alternative — Nabralift 3.MAX offers installation speeds between two and three times faster, providing a clear advantage in terms of timeframes and cost efficiency.
In the picture: Ion Arocena, CTO of Nabrawind, receives the certificate at an event held at La Finca (Pamplona, Spain).
