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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.
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Reference case Queensferry Crossing

High quality tension elements

Bekaert’ tension strands for cable stay bridges feature tensile strengths up to 2 200 Mpa 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.

Multilayer corrosion protection

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

  • 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.

Proven performance

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)
  • Balang bridge (Indonesia)
  • St. Lawrence Corridor (Canada)

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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