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The Tunable Bridge

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

A revolutionary breakthrough in bridge design.

With clear spans of up to 400', Big R’s Tunable Bridge is a structural hybrid that’s long on possibilities and short on costs. The Tunable Bridge combines the physics of a tied arch with any standard steel truss system or girder superstructure.

The bridge features an innovative adjustable structural system to balance the live and dead loads between the arches and trusses. With no fracture critical members, this redundant stress sharing system increases safety and allows for lighter, lower-cost material and longer, more-graceful designs.

Benefits

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

Applications

  • Stream Crossings
  • Road and Rail Crossings
  • Recreational Trail Bridges

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

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How the Tunable Bridge works:

  • The tied-arch sections are attached by adjustable, tension hanger rods to balance the live load.
  • Longitudinal, tightening rods pre-stress the truss modules for dead load before installation.
  • Fine-tuning adjustable arch and truss rods ultimately balances live and dead loads between the two systems.
  • With no fracture critical members, this redundant stress sharing system 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
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Big R Innovative Engineered Solutions

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Tunable-Bridge-brochure

Big R Tunable Bridge

» Download the brochure

Video: Big R vs. Competitors

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Watch our Apples & Oranges video to see how Big R's pedestrian bridges stack up against the competitions'.

» Watch the video