Stay cable de-tensioning & exchange
Stay cables are engineered to last for decades, but ageing infrastructure, or unexpected events, such as fires, or accidents, can compromise their integrity long before a bridge is due for replacement. In such cases, replacement is essential to ensure continued safety and performance of the asset and cables must be safely de-tensioned, exchanged, or dismantled. DYWIDAG delivers safe, efficient stay cable de-tensioning and exchange, supported by specialist expertise, dedicated equipment, and proven methods for managing complex, high-load operations.
Tailored to support your existing infrastructure
Our process begins with a comprehensive inspection of the existing cables, followed by a feasibility assessment to determine the most effective solution - whether repair, upgrade, or full cable replacement. Even if the original structure was supplied by another manufacturor, DYWIDAG can design and deliver a tailored solution that integrates seamlessly with the existing structure.
To support these tailored upgrades, DYWIDAG offers its advanced DYNA Grip® stay cable system, a high-performance solution, designed for both new and existing structures. DYNA Grip® has a compact anchorage design, which allows installation directly onto existing anchorage zones, helping reduce downtime during construction or maintenance.
In addition to permanent cable systems like DYNA Grip®, DYWIDAG also provides temporary stay cables to stabilize structures such as arch bridges, during erection. These temporary stays play a critical role in maintaining structural integrity throughout the construction process and are safely removed once the permanent system is installed.
Why Choose DYWIDAG?
Safe, controlled cable removal
DYWIDAG ensures the safe removal of old cables, whether full locked cables, parallel strand systems, parallel wire systems, or tension rod systems, through controlled de-stressing at the anchorage or along the free cable length.
Expert installation
Our stay cables are delivered and installed using proven methods. Before installation, we prepare the anchorage and transition zones at the deck and pylon to ensure structural integrity and smooth assembly.
Monitoring for structural safety
We provide contiuous monitoring to ensure structural stability throughout the entire process - from active oversight during cable dismantling to permanent structural health monitoring for new stay cables using integrated sensors.
Optional Add-On Services
Our stay cable systems can be enhanced with additional features, including fire protection, advanced damping technologies, and architectural cable illumination.
Ensuring safety with comprehensive monitoring
During cable replacement operations, DYWIDAG provides an integrated monitoring system that ensures maximum safety and precision at every stage. Critical parameters, such as cable forces and structural deformation, are continuously tracked to maintain full control during the sensitive phases of detensioning, removal, and installation.
The monitoring setup can include force sensors and real-time data analysis through DYWIDAG’s Infrastructure Intelligence platform, enabling remote access, automated alerts, and timely decision-making. These capabilities are especially crucial when de-stressing or cutting old cables, where any imbalance could compromise structural integrity.
By combining engineering expertise with advanced monitoring technology, DYWIDAG delivers cable replacement operations that are safe, efficient, and fully aligned with modern infrastructure standards
Your expert stay cable partner
At DYWIDAG, we understand how stay cables perform, age, and interact with the structures they support. Our expertise spans the entire lifecycle of stay cable systems, from design and installation to inspection, protection, and maintenance.
By combining engineering precision, specialized technology, and global field experience, DYWIDAG delivers services that improve reliability, extend service life, and reduce long-term maintenance costs. Whether you’re maintaining an existing bridge or planning proactive protection, our team ensures every cable system continues to perform safely and efficiently.
Because at DYWIDAG, we’re committed to making structures safer, stronger, and smarter.
Are your stay cables in need of de-tensioning & exchange? Contact our experts for complete peace of mind.
Our related services
Stay cable sheath repair
Essential stay cable sheath and cover repair, and replacement services to keep your cable-stayed structures safe and performing at their best.
Stay Cable Protection
Providing in-depth technical advice and advanced repair technologies customized to your project's unique conditions.
Cable cleaning and surface maintenance
Removal of surface contaminants, to prevent long-term degradation of the sheathing and anchor zones.
Rope access
Safe and efficient access alternative allowing the delivery of technically complex work safely and efficiently.
Damper replacement and retrofit
DYWIDAG offers inspection, replacement, and retrofit services for stay cable dampers.
Bridge Monitoring
Enhance bridge safety and longevity with real-time Structural Health Monitoring (SHM).
Our related products
DYNA Grip Standard System
High fatigue performance and excellent durability.
DYNA Link Anchor Box System (Saddle Solution)
Value added saddle solution.
Clevis Anchorage
Supports economical pylon structural design.
Stay Cable Strands
Designed to be maintenance-free.
Stay Cable Sheathings
Stay sheathings and dampers shielding against environmental influences.
Fire Protection
Avoidance of cable failures during extreme fire events.
Blast-Protection
Blast protection for Stay Cables: Fullfills AASHTO bridge security guidelines.
Dampers
Extending service life of your cables.