From emergency installations to ordinary bridge replacement, the stability and speed of prefabricated bridges offer communities in need a great opportunity. The Roberts Road Bridge gave U.S. Bridge the opportunity to replace an aging bridge with a brand new, wider bridge. In doing so, the Jackson County community is able to improve the traffic flow around the Little Salt Creek area.
Roberts Road Bridge Design
What was once a 78-foot single-span bridge with a pony truss and a timber deck structure spanning over Little Salt Creek is now a 90-foot span bridge with a steel truss span. The original bridge was built in 1960. Because of this, we were able to widen the aging roadway from 14 feet to 20 feet, allowing for two lanes of traffic. Our vision for the Roberts Road Bridge was not to just widen the bridge and roadway but also to make use of our twin monochord design. This unique feature combines the bottom chord’s gusset plates within its own chord elements.
State-of-the-Art Materials and Methods
Because of the federal funding used, the Roberts Road Bridge deck construction had to follow ODOT standards. In addition, the railing system also had to follow ODOT standards, utilizing a twin-steel tubular railing mounted on posts anchored to the concrete slab. Expansion joints and bearings also followed ODOT standards, these help separate the superstructure from the substructure. The inclusion of rubber strip seals in steel extrusions, anchored to the back wall and deck with metalized embedment armor, provides for thermal expansion and contraction of the superstructure while steel laminated elastomeric bearing pads support the truss shoe members that support the bridge.
Before assembly and shipping, each element of the bridge’s truss and floor framing system underwent a dip in molten zinc, galvanizing the steel. As a result, rain and snow will not be able to get to the underlying steel. The result is a highly durable coating that has the adhesive strength seven times that of an organic paint coating. A galvanized coating also weathers at a slower rate and can provide corrosion protection for over 100 years, maintenance-free.
Project Information and Technical Specifications
The contractor responsible for construction was DGM, Inc. while we here at U.S. Bridge designed, fabricated and erected the bridge. OHM Advisors oversaw site plans and the installation cost $287,289 and the entire project cost $903,460, all funded by federal dollars. Bridge erection took approximately 5 days after the formwork for the deck slab began.
Build with U.S. Bridge
When you choose to build with U.S. Bridge, you choose to build with a team of engineers and construction experts that commit themselves to building the best-prefabricated bridges. This is why U.S. Bridge is the top choice for developers and contractors. Please contact us and start the building process today! Or get a quick scope with our Bridgescope tool.
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