Stay Cables - Bridges

Stay Cables in Bridge Construction

Stay cables are essential to the structural integrity, durability, and aesthetics of modern bridges. VSL’s stay cable systems are engineered for high performance in both new and existing bridge structures. Whether for cable-stayed or extradosed bridges, our solutions combine proven technology, durability, and constructability, backed by decades of experience. 

The Role of Stay Cables in Bridge Construction

Cable-stayed bridges are the most cost-effective solution for spans and cantilevers measuring between 100 and 500 metres. Stay cables are used to transfer structural load or to hold a structure without using piers or columns.

Stay cables transfer deck loads efficiently to pylons, allowing for long spans with reduced substructure requirements. They are vital for cable-stayed and extradosed bridge configurations where structural lightness, aesthetics, and deck clearance are key. 

Modern stay cable systems incorporate advanced corrosion protection, vibration control, and health monitoring. These features increase service life and safety, especially in harsh environments. 

Strand-by-strand installation, modular components, and easy cable replacement contribute to reduced construction cycles, safer execution, and optimized lifecycle maintenance. 

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VSL’s Stay Cable Services

Stay cables are subjected to high tensile forces and stress variations – making them a very complex assemblage. The VSL stay cable system is the result of 40 years of constant R&D and meticulous rounds of improvements on the components.

Design and Engineering

VSL supports conceptual and detailed design phases, offering input on stay arrangement, pylon design, anchorage systems, and fatigue performance optimization.

Supply of SSI 2000 and SSI 2000D Systems

VSL provides complete stay cable systems including the SSI 2000 Stay Cable System, featuring high fatigue resistance and flexible anchor designs, and the SSI 2000D with internal dehumidification.

Installation and Supervision

Our teams manage all aspects of cable installation, tensioning, and adjustment. VSL also provides technical assistance and on-site supervision for critical operations.

Maintenance and Monitoring

Stay cables are equipped with health monitoring systems, including VSL's advanced SSI2000D technology that circulates dry air within the cable sheaths. We also offer periodic inspections and repairs.

Why Choose VSL for Stay Cable Services?

  • Proven Cable Technology

    VSL’s SSI 2000 system has been used in hundreds of cable-stayed bridges globally, offering superior fatigue resistance and long-term durability.

  • Expertise in Complex Projects

    From high pylons in urban areas to marine and seismic conditions, VSL adapts its systems and methods to meet project-specific challenges.

  • End-to-End Services

    VSL offers integrated services from design to commissioning, including cable supply, installation, form travelers, and monitoring systems.

FAQs about Stay Cables in Bridge Construction

These are some of the most common questions we receive. Got another one? Reach out to us!

It is VSL’s proprietary cable-stayed system optimized for fatigue resistance, modular installation, and superior corrosion protection. It includes options for saddles, friction dampers, and anti-vandalism measures.

VSL uses individually sheathed, waxed, and galvanized strands, sometimes with internal dehumidification (SSI 2000D) for continuous protection and monitoring.

Yes. VSL systems are designed for easy access and individual strand replacement, and our teams provide maintenance and refurbishment services globally.

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Need expert support for your stay cable bridge project?

Contact VSL to discuss tailored solutions, system design, and integrated services.