The Tunable Bridge – clear spans of up to 122 m
With clear spans of up to 122 m, the Tunable Bridge is a patented, structural hybrid that’s short on costs and long on possibilities.
The Big R Tunable Bridge is a revolutionary breakthrough in prefabricated steel bridge design combining the physics of a hinged 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. The resulting design is lightweight, economical, easy-to-install and very attractive. Ideal over high-traffic or difficult terrain, the prefabricated components install quickly and have all pins and connectors visible for easy inspections.
Benefits
- Lightweight
- Economical
- Easy-to-install
- Very attractive
Applications
- Highway and rail crossings
- Stream Crossings
- Recreational Trail Bridges
The Tunable Bridge – long on possibilities, short of costs
The Tunable Bridge combines the physics of a hinged tied arch with any standard steel truss system or girder superstructure and features an innovative adjustable “tuning” system to balance the live and dead loads between the arches and trusses.
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.