Cable stayed bridges are very efficient structural systems with light weight superstructures and large lever arms. The most important elements of these aesthetically pleasing and often dramatic structures are the closely spaced stay cables which transfer the loads to the foundation via the pylon. It is essential for these tensile elements to be durable and easy to maintain. They are generally designed to be restressable and replaceable.

DYWIDAG has been involved in the development, construction, and execution of stay cables and cable-supported structures since 1970.

Based on internationally recognized guidelines for stay cables and on our own design criteria of the world famous DYWIDAG Multistrand tendons, we first developed stay cables with bars and applied them for large bridges (for example Dames Point Bridge, Florida USA; main span 396 m).

Afterwards, we were able to take advantage of our many years of experience and expertise in Post-Tensioning and prestressed concrete construction, particularly in the field of long span bridges.

DYWIDAG Multistrand Stay Cables were developed in the eighties to accommodate ever-increasing spans and the resulting need for economical high capacity cables. Today, strand cables are widely used for many types of structures. This website gives an overview of DYWIDAG Multistrand Stay Cable Systems. The special use of stay cables for extradosed tendons is also included. More detailed information is available on request.

Quality Assurance

To ensure high quality and, consequently, the performance and durability of DYWIDAG Stay Cables, all components are subjected to quality tests in accordance with our quality assurance system. DSI is ISO 9001 certified.

For internal quality control, DSI maintains a test lab in Germany for the in-house testing of geometry, material and performance.