As part of the B69 Narellan Road upgrade, Freyssinet Australia delivered the stay cable and bearing works for a striking new 75 m shared path bridge over the Hume Motorway. Featuring a 25 m main span and a 25 m-high steel H-shaped pylon, the bridge utilises the H1000 stay cable system with customised long turnbuckles for precise adjustment. All cables and bridge segments were prefabricated and installed on site under carefully managed motorway closures, showcasing Freyssinet’s expertise in complex bridge construction and precision installation.

  • Customer/Owner:
    Roads and Maritime Services
  • Engineer
    Arcadis (Hyder Consulting)
  • Works period
    October 2017 - March 2018

Freyssinet Scope

  • Design, supply, and installation of:
    • 4 × 12H1000 back stay cables (27 m long)
    • 6 × 7H1000 main span cables (25–45 m long)
    • 8 pot bearings (560 kN vertical load, 60 mm longitudinal displacement)
  • Fabrication and on-site installation of stay cables using forked anchorages with adjustable turnbuckles
  • Provision of extra-long turnbuckles (+/- 100 mm for 12H1000 and +/- 150 mm for 7H1000) to RMS specification
  • Partial motorway closures for cable installation to tower; deck/abutment connections made with no or minimal tension
  • Cable length adjustments during installation in accordance with designer’s instructions
  • Final survey and adjustment using two types of stressing frames (matched to anchor size)
  • Installation of pot bearings post deck and cable works, with load transfer using 60-ton locking collar jack

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