Steel strands for cable stayed bridges

Steel strands for cable stayed bridges
Increase the safety and long-term reliability of your cable stayed bridges. Bekaert’s highly ductile, super high tensile tension elements are designed and produced to meet the 100 year design life. These robust, seven wire strands feature multilayer corrosion protection consisting of Bezinal®3000, wax and HDPE sheathing.

Strands you can rely on

 

Bekaert cable stay strand

Stay step ahead
with the right partner for development

Bekaert’ tension strands for cable stay bridges feature tensile strengths up to 2 200 Map and high breaking load and fatigue properties on wire level. Our master or reference strands are produced with precision tolerances up to 0.005% (equals 5 mm tolerance on 100 m of strand) and meet the NF A35-035 and ISO15630-3 standards.

BBR has used Bekaert stay cable strands for its 151 multi strand fatigue test. Performed test is the world record in number of strands used for multistrand fatigue test. ZERO wire failure proves robust performance of Bekaert stay cable strands.
                            

Multistrand test conditions

-   151 stay cable strands of 15,7 mm diameter, forming the full tendon
-   2mil LC at 200 MPa stress range
-   Followed by a tensile test reaching 100% GUTS ( 42,129 kN )
-   ZERO wire failure


Durability
thanks to multilayer corrosion protection

 

The strands are protected by three layers of corrosion protective coatings;

cable stay strand
  • Bezinal®3000: This advanced zinc aluminum coating complies with the NFA 35-035 standard (190 – 350 g/m²). Bezinal®3000 offers superior corrosion and cathodic protection which, compared to zinc, lasts up to 4 times longer when exposed to pollution or marine environments (DIN SS 5002, ASTM B117, ISO 9227).
  • Wax: This coating is completely water resistant and has been specifically designed for stay cables. The wax features high mechanical stability, and offers additional corrosion resistance to the metallic coating below.
  • HDPE sheathing: This layer consists of pure PE that has been tightly extruded around the strand. The standard wall thickness of the sheath is 1.5mm (thicker sizes available upon request).

Meeting Fib and PTI recommendations

Bekaert HDPE extruded stay cable strands comply with Fib and PTI recommendations for stay cable design testing. Our strands successfully pass the pull-pull fatigue test of 2000 000 cycles, leading to more durable stay cables.

 

High service flexibility

Bekaert’s production facility includes high-end production machinery including brand-new extruding and stranding equipment.
Our advanced machine park allows us to increase our production capacity to meet even the largest projects. To further reduce time, money and waste, Bekaert is able to supply volumes up to 4,5 tons per coil. For your installation convenience, our master strands are supplied in pieces marked to exact length.


Efficiency without surprises thanks to our long track record

Bekaert has a long track record in providing wire, strand and cable solutions for a wide range engineering structures. Our super high tensile wire has a particular strong track record in deep water mooring applications as well as for cable stayed bridges such as:

  • Queensferry Crossing (Scotland)                    Reference case Queensferry Crossing
  • Balang bridge (Indonesia)
  • St. Lawrence Corridor (Canada)
Cable stay bridge_render

Sustainable solution

Environmental Product Declaration (EPD)

Bekaert Environmental Product Declaration is a comprehensive report disclosing the environmental impacts of a product over its cradle-to-gate life cycle. This declaration is the Type III Environmental Product Declaration (EPD)  based on EN 15804:2012+A1 and verified according to ISO 14025 by an external auditor.

What does it mean?

To produce 1 kg of HDPE sheathed galvanized and waxed stay cable strand in our plant in Slovakia, below values of CO₂are emitted into the atmosphere:

                                  A1          raw material                         0.671 kg CO₂
                                  A2          transport to Bekaert             0.000655 kg CO₂
                                  A3          manufacturing process        0.329 CO₂

Why is the this declaration important?

  1. to understand carbon footprint of the cable stay strand in general
  2. this declaration is often required by end users
  3. it helps you to calculate the CO₂ footprint of a particular structure

Advantages

  • 100 year service-life
  • Short-time delivery of large volumes
  • Marked-to-length master strands for easier installation
  • High service flexibility

Features

Shape Cord - rope - strand
Bulk Material C-steel
Coating Bezinal® , Zinc
Number of Wires 6-12
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