Stay Cables
Span Systems International is the exclusive licensee of Dywidag Systems International in Thailand who has developed, tested, supplied, installed, inspected, monitored, maintained, repaired, and exchanged stay cables for cable-supported structures since 1970. The scope of services include:
- Cable stayed bridges
- Extradosed bridges
- Arch bridges
- Cable-supported wind towers
- Roof structures
The research and development around DYWIDAG’s stay cable systems combine the highest safety and reliability standards—with economic efficiency. The DYNA Grip® System, introduced in 2000, was designed to meet the needs of modern cable systems at the turn of the millennium—and is still in use today. The standard DYNA Grip® System includes installation equipment and project-specific engineering with inspection and test plans, detailed method statements—and a comprehensive inspection and maintenance manual.
Our economical and high-performance stay cable systems reliably transfer the loads from the deck via the pylon to the foundation—and are long-lasting and easy to maintain.
Additional features can be added to the stay cables, depending on the project needs
- Customized damper design with different types of dampers—such as external viscous damper or internal viscous, rubber, and friction damper
- DYNA Link anchor box to avoid anchorages inside the pylon—and with full transfer of horizontal cable forces
- Friction type saddles for continuous deviation of strands through the saddle—achieving a high friction resistance
- Clevis anchorage with pin connection to gusset plates connected to the structure
- Fire protection system for the free length and/or the anchorage for various protection times, limiting the maximum temperature of the cable to 300°C at a hydrocarbon fire of 1100°C
- Anti-vandalism or blast protection systems as a one-part or two-part system—also as retrofitted systems on existing bridges to protect the cable against vandalism or terrorist attack
- Cable illumination by LED systems—integrated into the outer HDPE pipe for aesthetic cables and proven in wind tunnel test campaigns
- Passive and/or active deicing systems—mitigating the risk of falling ice
- Integrated monitoring systems—contributing to the longevity of modern construction
Offered services
- Cable detailing
- Damper design
- Vibration measurements
- Installation of cables and monitoring devices
- Pipe repair
- Cable wrapping
