Fatigue Systems

The NEW MACALLOY FATIGUE SYSTEM is a breakthrough in fatigue-rated tension bar technology, designed for structures exposed to cyclic loading, such as bridges.

Fully compliant with BS EN1993-1-9 EUROCODE 3, it offers exceptional durability and performance. The system supports bar diameters up to 140mm, with strength grades of 460N/mm², 520N/mm², and 550N/mm², tested beyond 2 million cycles and maintaining performance at stress ranges up to 131.25N/mm².

A key innovation is the MACALLOY FATIGUE FORK, crafted using advanced lost foam technology to enhance surface finish and ensure Level 1 integrity. Macalloy provides cutting-edge solutions for fatigue-critical projects, offering reliability where it matters most.

Macalloy Tensile Products can deal with the new generation of multi-purpose bridges; applications vary from lightweight footbridges to multipurpose tram and multi-lane road bridges.

New Macalloy Fatigue Systems in Bridge Applications

Fatigue plays a crucial role in the design of bridges that experience cyclic loading.

Detail Category 84 The systems rated at 460N/mm², 520N/mm² and 550N/mm² have undergone successful testing, demonstrating their capability to withstand a stress range of 105N/mm² for over 2 million cycles, with a peak load of 45% of their ultimate tensile strength.

Detail Category 105 The 460N/mm² and 520N/mm² systems have undergone successful testing at a stress range of 131.25N/mm² for over 2 million cycles, achieving a maximum load of 45% of their ultimate tensile strength.

The Macalloy Detail Category 105 tension bar systems are in accordance with the testing parameters for pre-stressing tension bars as per EN 1993-1-11.

Benefits of Macalloy
Tension Bars.

  • Macalloy have developed a “trademark” architectural aesthetic carbon and stainless fork connector.
  • Ease of installation and the avoidance of any pre-stretching requirements, means a cost effect solution to cable alternatives.
  • Tensile Bars offer a more rigid solution than cable ensuring reduced deformation of the bridge deck and ease of installation.
  • The Macalloy Technotensioner solution for “in line” tensioning pretensions loads in TENSILE BARS as well as load monitoring post installation. Macalloy has an extensive fleet of jacking equipment designed to meet most requirements and can design bespoke equipment for specialist applications.
  • Macalloy offer site services support.
  • Macalloy’s spherical bearing solutions can accommodate misalignments of up to 5.9 degrees.
  • Corrosion protection is available on Macalloy Tie Rods.

Our Projects

Our supply chain continues to expand via an international network of Macalloy agents and distributors, ensuring continued growth in the global market.