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Prefabricated Bridges

The Tunable Bridge

1306260374_ACC_Tunable_Under_Construction
Big R Tunable Bridge from AIL, underside detail view of pedway.

A revolutionary breakthrough in modular steel bridge design.

With clear spans of up to 400', Big R’s Tunable Bridge is a patented, structural hybrid that’s short on costs and long on possibilities. A revolutionary breakthrough in modular steel bridge design, our Tunable Bridge combines the physics of a hinge-tied arch with any standard steel truss system or girder superstructure.

The bridge features an innovative adjustable “tuning” system to balance the live and dead loads between the arches and trusses.

Benefits

  • Lightweight
  • Economical
  • Easy-to-install
  • Very attractive
  • Ideal over high-traffic or difficult terrain
  • Custom design makes maintenance easy

Applications

  • Highway and rail crossings
  • Stream Crossings
  • Recreational Trail Bridges

The Tunable Bridge – long on possibilities, short of costs.

How the Tunable Bridge works:

  • Longitudinal, tightening rods in the trusses’ lower chords pre-stress the truss modules for dead load before installation.
  • The tied-arch sections are then attached by adjustable, tension hanger rods to balance the live load.
  • Fine-tuning adjustable arch and truss rods ultimately balances live and dead loads between the two systems.
  • With no critical members, this redundant stress sharing increases safety and allows for lighter, lower-cost material and longer, more-graceful designs.
To learn more about the Tunable Bridges, please contact one of our knowledgeable sales representatives.

» Find your closest representative

Tunable Bridges provide safe and efficient solutions for extra-long spans.


Tunable Bridge from Big R Bridge

 Tunable Bridge from Big R Bridge
Tunable Bridge from Big R Bridge Tunable Bridge from Big R Bridge
Tunable_lure(125x101)

Check out our Tunable Bridge brochure

» Download the brochure
public-works-brochure

Check out our Public Works brochure

» Download the brochure
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