A Truss Bridge Can Easily Accommodate Dynamic Loads
Truss bridges are one of the oldest bridge types in America. They are used for a variety of reasons, mainly because they can easily accommodate dynamic loads. For rural highways over streams or railroads, a steel truss bridge provides a viable solution. Because of the arrangement of floor framing members connecting into truss elements, the bridge’s structural depth can be minimized as compared to under-deck girder systems.
A truss bridge’s load-bearing superstructure is composed of a truss, a structure of connected elements usually forming triangular units. The connected elements (typically straight) may be stressed from tension, compression, or sometimes both in response to dynamic loads. A truss bridge is economical to construct because it uses materials efficiently. Truss bridge advantages include:
- Economical To Build: The materials to build a truss bridge are minimal, and every single bit is used very efficiently. The strength comes when these materials are formed to the triangles.
- Strong: The unique triangular design provides support for the entire bridge. This gives it great strength making it ideal for very high traffic and heavy load areas.
- Built In Difficult Places: These types of bridges can be built across small or long spans while maintaining their strength. Virtually anywhere that a bridge is needed, a truss bridge can do the job.
- Long Distance: A truss bridge can clear spans of up to 300’. Due to transverse bracing, these bridges have a high span capability.
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