Restraint system for wind turbines
High Tensile Holding Down Bars are a special application for smooth Post Tensioning bar systems for the connection between steel and concrete elements or concrete to concrete elements.
Typical applications include the holding down bars for wind turbines, for the connection of steel pylons to concrete foundations, and for the connection of precast concrete elements.
Each bar tendon is typically terminated via a nut bearing onto steelwork or a steel plate. In order to eliminate bar stretch and hence movement under externally applied loads, the bar is usually tensioned using a hydraulic jack.
A type of anchorage to connect steel to concrete, or concrete to concrete elements
- Diameters range from 31mm (thread M33) to 100mm (thread M103).
- 3 steel grades are available: Grade 1030, Grade 1080 and Grade 1200.
- Rolled threads (obtained with cold plastic deformation of the metal between two dies) optimized for fatigue performance.
- ISO metric thread as per ISO 965-1.
- For corrosion protection, a protection cap can be supplied which bolts onto the end bearing plate over the bar end, nut and washer.
Wide range
3 steel grades available in 12 diameters.
Engineering support
Dextra teams support the drafting
of your system.
Full Traceability
Full identification from drawing to
individual part labeling.
Benefits
- High ductility, fatigue resistance, impact resistance.
- Full traceability and individual bar labelling.
- Ready-to-install conditions.
- Sea-worthy packing.
- Project engineering support by Dextra dedicated Bar Systems Engineering team.
Related Projects
Related solutions
Very high-tensile post-tensioning bar system based on smooth bars with cold-rolled threaded ends. Suits even the most demanding applications.
High-tensile PT system based on fully-threaded bars which can be cut and reconnected at any point. Preferred for temporary applications.
Tension Rods are aesthetic and highly-performing bar systems working in tension, usually for the cross-bracing of roof or façade structures.
Expertise
At every moment of your customer journey, Dextra teams dedicate themselves to the production of smart construction solutions that allow our customers to reach higher productivity and safety levels on their construction sites.
Dextra holds physical stocks on several continents, complemented in each country by the local inventories of our distributors. With this extended network, Dextra makes sure our products are always at reach no matter where our partners are.
For solutions that require to be customized, Dextra can also go beyond our standard delivery times and offer accelerated delivery schemes. Consult us for more information.
From 3 major industrial sites located in Bangkok (Thailand), Guangzhou (China), and Pune (India), Dextra completely owns its manufacturing facilities and processes. This allows us to have complete control over the timing of our operations and the quality of the solutions produced.
An independently accredited material testing laboratory, accredited to ISO-IEC17025, is located at Dextra’s main Bangkok factory, allowing the testing of material and products.
Dextra aims to supply products that exceed the most demanding international technical approvals and it is our goal to create maximum customer satisfaction by complying with our clients’ needs and specified requirements.