Typical Coupling, Uhlavu Bridge, Pilsen, Czech Republic
Typical Coupling, Uhlavu Bridge, Pilsen, Czech Republic

DYWIDAG Prestressing Systems using Bars

System Description

 

DYWIDAG Prestressing Systems are world renowned for reliability and performance. They are suitable for all applications in post-tensioned and prestressed constructions. They embrace  a whole range of applications from bridge construction and buildings to civil applications, above and underground.

The first ever structure built with a prototype DYWIDAG Post-Tensioning System using bars was the arch-bridge Alsleben (Germany) in 1927. From that time on, DYWIDAG has continuously improved its systems to keep up with the growing demand of modern construction technology.


Uhlavu Bridge, Pilsen, Czech Republic
Uhlavu Bridge, Pilsen, Czech Republic

In addition to the traditional bar post-tensioning system that is mainly geared towards geotechnical applications, building rehabilitation and strengthening, DSI offers a complete product line in strand prestressing (bonded, unbonded and external) as well as stay-cables and is thus able to fully serve the post-tensioning construction sector.

DYWIDAG Prestressing Systems have always combined highest safety and reliability standards with economical efficiency in their research and development. Dependable corrosion protection methods contribute to the longevity of modern construction. High system description fatigue resistance is achieved with optimized material selection and cautious detailing of all the components, especially in system assembly.

Bar systems for prestressed structures with bond, without bond and with external tendons are regulated in European Technical Approval ETA-05/0123. This ETA can be downloaded at http://www.dywidag-systems.com/downloads/dsi-approvals/european-approvals.html.


For geotechnical applications, a ground anchor with 47 mm threadbar diameter will be provided. A Ø47 mm threadbar prestressing tendon is in preparation. Additionally, DSI USA provides DYWIDAG Prestressing Systems with threadbars 65 and 75 mm.


The intended use for internal bar tendons is for concrete, composite and masonry structures. Internal unbonded and external bar tendons are used for concrete, composite, steel, timber and masonry structures. Typical applications are transversal prestressing,  bridge strengthening, rehabilitations, connection elements for steel structures and machines and temporary applications.