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Wider gaps
One way to cross wide gaps is to repeat bridge units, such as beams or arches. Piers are then necessary to act as supports for these repeating units. The more piers, the greater the blockage to the flow beneath the bridge.
Lesson Objectives
- Students could be able to predict the consequences of putting piers in a river and understand how this affects the development of bridge design. Should be able to explore the strength of arches and know that as materials and technologies have improved it has been possible to span rivers using fewer piers.
- Students must know that the distance that can be bridged depends on the strength of the material and that to bridge wide gaps, repeating units may be necessary.
This resource is part of a full set of lessons looking at London bridge design which can be found here
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Wider Gaps.pdf 460.14 KB
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Wider Gaps.pdf 460.14 KB
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