Bridges are like giant sandwiches. They have strong materials inside, like steel or concrete, that hold them up. Over time, they might get a little tired, but engineers help them stay strong by fixing the parts that wear out.
Examples
- A wooden bridge might get a new plank when one breaks.
- Engineers paint a steel bridge to stop it from rusting.
- Older bridges sometimes have extra supports added.
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See also
- How Do Bridges Hold Up Heavy Traffic?
- How Do Bridges Stay Up Without Being Tied Together?
- How Do Bridges Stay Up Without Support?
- How Did the Ancient Egyptians Build the Pyramids?
- Why Did the Ancient Romans Build Aqueducts?
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