All these different truss patterns also factored into how beam bridges were being built.
What are Truss Bridges? How can we Construct a Truss Bridge?
Some takes featured a through truss above the bridge, while others boasted a deck truss beneath the bridge. A single beam spanning any distance undergoes compression and tension. The very top of the beam gets the most compression, and the very bottom of the beam experiences the most tension. The middle of the beam experiences very little compression or tension.
13 Significant Truss Bridge Pros and Cons
This is why we have I-beams, which provide more material on the tops and bottoms of beams to better handle the forces of compression and tension. And there's another reason why a truss is more rigid than a single beam: A truss has the ability to dissipate a load through the truss work. The design of a truss, which is usually a variant of a triangle, creates both a very rigid structure and one that transfers the load from a single point to a considerably wider area.
While truss bridges are largely a product of the Industrial Revolution , our next example, the arch, dates back much further in time. The load can be carried above deck truss , along the middle through truss or on a bottom truss, which sits below the major truss structure.
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The options make the truss bridge both versatile and economical to build. Fun fact: the longest truss bridge in the world is the Ikitsuki Bridge in Japan, which stretches for metres.
How Bridges Work
The structure of a truss bridge is, by design, large. The interconnecting triangular components need to be large in order to bear and distribute heavy loads. This means that in certain restricted spaces, the truss bridge may not be the best option.
Economies of scale! The truss bridge uses a LOT of parts.
However—the maintenance costs of so many parts can be expensive. A truss bridge, like any load-bearing structure, will require regular and detailed maintenance.
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So many parts to look after can mean that this is expensive—not to mention time consuming! Truss bridges are intricate, complex structures.
Each and every piece needs to fit perfectly in order to perform its function, and anything less will mean that the bridge simply does not hold a load. A truss bridge requires detailed engineering and specialist construction—this does not come cheap. You know—anyone can build a bridge, but it takes an engineer to get you over it. Because truss bridges are so large, and use a lot of materials, they are heavy.
Depending on the landscape supporting the bridge, some reinforcement may be necessary to cope with the weight. Remember Me. Lost your password? Construction Construction See all.
How bridges balance forces
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Related background information on truss bridges building
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