About HASSLACHER Green Tower GmbH
HASSLACHER Green Tower GmbH is part of the HASSLACHER group, one of Europe’s leading timber industry companies, innovation leader and world market leader in the field of glued laminated timber. HASSLACHER Green Tower GmbH’s business purpose is the development of dynamically and highly stressed superstructures from composite materials, with a focus on wood as a material and their sale. HASSLACHER Green Tower therefore focuses on special solutions that are subjected to high dynamic loads and require long-term use of the superstructure in question.
The associated development is connected with a high degree of fundamental and applied research.
For this purpose, we work with several distinguished institutes at different Central European universities. HASSLACHER Green Tower’s lighthouse project is the development of a flexible construction platform for the production of segmented support structures for hybrid-construction wind power systems.
This is why HASSLACHER Green Tower GmbH has spent the last few years developing both hybrid towers and pure timber frame towers using glued laminated timber. The construction elements used in the timber hybrid towers are produced by the HASSLACHER group. The HASSLACHER group is the world’s market leader in the field of glued laminated timber, giving it the associated processing expertise.
Renewable energy with proven technology
Drawing on more than 120 years of experience with the material wood, the HASSLACHER group – the technological leader in its industry – now applies its proven timber construction solutions to wind turbine towers.
World market leader in the field of glued laminated timber
First-rate results thanks to tested quality, reliability and expertise. The HASSLACHER group offers international planning and implementation of dynamically stressed structures and draws on many years of experience with tower structures exposed to the elements.
The team of the HASSLACHER Green Tower GmbH
from left to right
Georg Dürregger
HASSLACHER Mass Timber GmbH – Head of Mass Timber Division
Karl Fatrdla
HASSLACHER Energie GmbH – Managing Director
Tassotti Stefan
HASSLACHER Holzbausysteme GmbH – Managing Director
Christoph Kulterer
HASSLACHER Holding GmbH – Owner and CEO
Thomas Ziegenbein
HASSLACHER Green Tower GmbH – Product Strategy
Harald Schabus
Head of WP & Special components
Werner Mussnig
HASSLACHER Green Tower GmbH – Managing Director
Martin Steiner
Lackner-Egger – Structural analysis
Carlo Schröder
HASSLACHER Green Tower GmbH – Produkt Ingenieur
Green Tower – It’s in the name!
The careful and responsible handling of nature is a matter of fact for us. We place high importance on the sustainable procurement of the valuable and regrowing raw material that is wood to secure its availability to future generations. That’s why we exclusively procure our wood from sources that follow these principles.
Do you have questions regarding projects, developments and availability of the timber hybrid tower?
Every tower concept can be scaled. The question is: How big is the development effort to adapt the tower to other hub heights and system types? Structural engineers design our rod-shaped structure in such a way that loads are always transferred through the entire structure in a vectorial way along the supports and diagonals. Contrary to large-area wall structures where loads are transferred into the different areas via various angles, our timber frame structure guarantees very clear load transfer through the entire structure. This makes adapting it to different hub heights and system types much easier. In the future, type certification of the timber hybrid tower is supposed to be based on component certification, meaning that new certification processes can be processed more quickly and with markedly reduced effort.
Our first timber hybrid tower pilot system will be built in Rhineland-Palatinate in 2025 (according to notice by the German Federal Ministry for Economy and Energy) for certified configuration. Further cooperation agreements for systems in Austria and Germany have been concluded with various project development companies. The first German and Austrian wind farms are being prepared for 2026 (logistics concept, assembly areas, legal permits etc.)
Currently, we possess type certification for a timber hybrid tower with a hub height of 137 m. In the framework of further development, we focus on hybrid towers with a hub height between 160 and 170 m. From a technical perspective, greater hub heights up to 200 m are possible provided appropriate resources are used.
Our tower concept also offers an interesting alternative for NH 130-150, which are currently implemented with closed, round all-steel towers most of the time. Our tower, together with the other components of the wind power system, can also be erected economically and without interruption using a crane and our stiffer tower is less susceptible to wind-induced cross-vibration during assembly, which makes its erection easier to plan and reduces downtimes. Our tower can be erected by wind power system manufacturers and offers them all possibilities of optimising their building procedures for their projects. Furthermore, we would like to stress that a lot of steel could be substituted with our timber structure in the lower area of NH 130-150m systems.
The HASSLACHER Green Tower timber hybrid tower is currently built from laminated spruce beams. Compared to other wood species, spruce has an average bending strength and boasts average values regarding weathering effects. Also, spruce is currently easier to source and more affordable than other wood species. Tests with other wood species (birch, pine, larch etc.) are currently underway and could be used for connecting elements in the future. In the future, wood species such as pine and larch will assume important roles regarding weathering protection, especially in specific climate zones.
The HASSLACHER group is among the largest wood processing firms in Europe. The timber hybrid towers can be produced at several sites in Austria and Germany. Accordingly, the HASSLACHER group, as the supplier of the timber elements for the HASSLACHER Green Towers, is capable of establishing an annual production of 100 towers within relatively short time (one year). In the mid- and long-term, further production capacities can be unlocked. Regarding wood availability, we are able to reference the wide-ranging purchasing channels of the group, ensuring the required availability.
to wonders.
