Benefits

Why choose Freyssinet cable protection solutions for your project

01. A solution for each project

Solutions for each type of risk, which can be combined

02. Fully tested solutions

Our solutions are tested in internationally recognized laboratories such as SEFTIM for ligthning protection.

03. Easy replaceability

All our solutions are designed to be replaceable, regardless of their technology and whether they are mounted on new or existing structures.

04. Specialist development

All solutions are developed in-house by Freyssinet, who precisely specify and control the manufacture.

Cable systems: protection solutions

Fire protection

Fires are common on bridges due to traffic accidents or collisions between trucks and the bridge structure. They can cause cables to collapse, which is a major safety issue especially for closely spaced cables close to or above the roadway. Our fire protection system is qualified to maintain the temperature of the strands < 300 °C for 45 min up to 3h. It consists of a microporous material made from sand and does not affect cable endurance and lifetime. Applications: cable-stayed bridges, suspension bridges, extradosed bridges, stadiums.
  • Various durations of protection available.
  • Adjustable to any stay cable length or diameter
  • Easy to install on new or existing structure

Fire protection

Fires are common on bridges due to traffic accidents or collisions between trucks and the bridge structure. They can cause cables to collapse, which is a major safety issue especially for closely spaced cables close to or above the roadway. Our fire protection system is qualified to maintain the temperature of the strands < 300 °C for 45 min up to 3h. It consists of a microporous material made from sand and does not affect cable endurance and lifetime. Applications: cable-stayed bridges, suspension bridges, extradosed bridges, stadiums.
  • Various durations of protection available.
  • Adjustable to any stay cable length or diameter
  • Easy to install on new or existing structure
Fire protection specifications
Design

Standard supplies with limited assembly work on site
Height of protection

Up to bridge owner – generally 12m above deck
Duration of protection

45 min, 1h, 2h and 3h available – 10 to 50 mm thickness
Damper compatibility

With any Freyssinet damper: IHD, IRD, EHD
Stay cable behaviour

Stay cable and anchor resistance qualified and guaranteed up to 300°C
Qualification

Protection against the most severe case: the hydrocarbon fire as per PTI recommendations (PTI DC45.1-18)

Lightning protection

The probability of a bridge being struck by lightning cannot be neglected. Freyssinet offers effective protection for the area not covered by the pylon lightning protection system, according to the highest protection class of the relevant European standard. Full-scale tests have been carried out in recognised laboratories and have qualified our system under real current and lightning strike conditions. Applications: cable-stayed bridges, suspension bridges, extradosed bridges, stadiums.
  • Stainless steel assemblies provide adequate potential
    and conductivity, while improving the corrosion resistance
    of exposed component.
  • The system is almost invisible from afar:
    it is either encased in the stay cable system
    or designed with thin components.

Lightning protection

The probability of a bridge being struck by lightning cannot be neglected. Freyssinet offers effective protection for the area not covered by the pylon lightning protection system, according to the highest protection class of the relevant European standard. Full-scale tests have been carried out in recognised laboratories and have qualified our system under real current and lightning strike conditions. Applications: cable-stayed bridges, suspension bridges, extradosed bridges, stadiums.
  • Stainless steel assemblies provide adequate potential
    and conductivity, while improving the corrosion resistance
    of exposed component.
  • The system is almost invisible from afar:
    it is either encased in the stay cable system
    or designed with thin components.
Lightning protection specifications
European Standard

Category 1 class protection as per IEC 62305, highest protection class
Lightning resistance over time

Compliant with long duration lightning current: 750A.s, most powerful stroke defined in the European standard
Lightning resistance by power

Compliant with strokes 200kA 10/350µs, 3,75 times higher than recommended by standard IEC 62305 series

Ice shedding control solutions

Our innovative cable de-icing system offers active and passive protection to bridge users against ice bombs hazards, caused by the debonding of ice from the surface of the ducts. The passive system significantly reduces the amount of ice falling from the cables. The active system, fully integrated into the duct, allows the ice to be removed remotely at any time. Applications: cable-stayed bridges, suspension bridges, extradosed bridges, stadiums.
  • Less bridge closures in winter
  • Possible turnkey combination of passive and
    active solutions with a predictive weather interface
    to optimize energy requirements
  • Low maintenance:
    - Durability of the passive system
    - Easy dismantling of the active system at deck level

Ice shedding control solutions

Our innovative cable de-icing system offers active and passive protection to bridge users against ice bombs hazards, caused by the debonding of ice from the surface of the ducts. The passive system significantly reduces the amount of ice falling from the cables. The active system, fully integrated into the duct, allows the ice to be removed remotely at any time. Applications: cable-stayed bridges, suspension bridges, extradosed bridges, stadiums.
  • Less bridge closures in winter
  • Possible turnkey combination of passive and
    active solutions with a predictive weather interface
    to optimize energy requirements
  • Low maintenance:
    - Durability of the passive system
    - Easy dismantling of the active system at deck level
Ice shedding control solutions specifications
Passive protection

Innovative micro texture of the duct to promote ice adhesion and limited aerodynamic effect
Active protection

Duct de-icing actuator operating with vibrations
Remote control

Fully compatible with remote control for simultaneous activation of all stays
Compatible with weather forecast

The active system can be coupled with weather forecasts.

Download our technical datasheets on our cable protection solutions

Documentation
Documentation

Our references

Repair
Greece

Rio Antirrio bridge stay cables lightning protection

When a bolt of lightning damaged the cable system, the cable-stayed bridge lightning protection had to be carried out along with the emergency replacement of one of the cables.
Discover more
Blagoveshchenk bridge, Russia / Fire protection system
Rion-Antirion bridge, Greece / Lightning protection
Ammonite building, Montpellier, France / Fire protection
Anzac bridge, Australia / Fire protection system
Anzac bridge, Australia / Fire protection system with IRD dampers

Other cable system solutions

Strand solutions

Strands are the main components of Freyssinet Parallel Strand System (PSS) cables, and are often referred to as main tensile elements. They are the modular elements that allow full cables of any size to be made from lightweight yet durable elements bundled together. Freyssinet has developed two technologies, known as Monostrand® and Cohestrand®, which set the standard in the construction of cable structures.

Anchorage solutions

Anchorages are engineered by Freyssinet internal design team to extend the life of stay cables. They are also manufactured in-house to ensure the highest level of manufacturing control. Our modular solutions cover all needs from short cable hangers using clevis up to very long span cables.

Damper solutions

Dampers are mechanical assemblies installed between the cable and the bridge. They dissipate energy to ensure the stability of the cable.

Aesthetic enhancement solutions

Cable-stayed bridges are elegant and strong structures that can become iconic architectural landmarks. To further enhance their aesthetics, we have developed coloured ducts and lighting systems. Combining functionality, aesthetics and mechanical performance, our solutions are customised to your requirements.

Suspension cable solutions

The parallel strand system developed by Freyssinet, well known for cable-stayed bridges and extradosed bridges, brings advantages in terms of durability for suspension bridges and cabled stadium roofs.

Cable systems

Cabled bridges and structures are sustainable, environmentally friendly and architecturally outstanding structures.

Contact us

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