Why Prestressed Concrete Bridge Girders are the Preferred Choice for Long Lasting Bridges
Prestressed concrete girders are the leading choice for bridge construction across the country, and it’s easy to understand why. Compared to other materials and bridge superstructures, studies show prestressed I-beam girders have the longest service life and require less maintenance. Prestress concrete girders are also increasingly specified for their aesthetic versatility, strength, quality and shortened construction time.
Engineered for PerformanceStates have their own shape and preferred style of girders. County Materials works closely with individual state departments of transportation to engineer approved girders that meet the need of each state, including MinnDOT, WisDOT, I DOT (Illinois) and M DOT (Missouri). In addition, after bridge girders are set in place, most bridges utilize a cast-in-place or precast bridge deck made of concrete. In Wisconsin, County Materials Corporation has the capabilities to manufacture girders and precast deck panels or supply the site with ready-mix for the bridge deck. Working with a single supplier helps with project coordination and ensures materials work together.
In many cases, bridge construction can shut down busy roads and highways. Minimizing road closure time is a key goal in bridge design and project planning. Prestressed girders help reduce road closure time by offering ready-to-install materials upon delivery. In other construction methods, such as cast in place, construction is delayed for the extra time it takes to move the forming equipment and curing that has to be done on site. In addition, prestressed girders have reliable quality because they are manufactured in a climate controlled environment.
Expert Delivery Gets It ThereCounty Materials manufactures girders as long as 168’ and weighing up to 194,000 lbs. When you take into account a typical semi-trailer is 53’ long, transporting girders of this size is a difficult task. County Materials’ experienced dispatchers and professional drivers are skilled at getting these massive girders to the job site safely. Using special steerable trailers, our delivery trucks can make turns that would otherwise be impossible. The beams are transported at speeds under 45mph and the trucks are accompanied with two escort vehicles.
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