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Why do long bridges use expansion joints?

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  1. To add weight that steadies the deck
  2. To accommodate changes in bridge length
  3. To drain rainwater off the deck

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References

  1. Improved Bridge Joint Materials and Design Details, Kentucky Transportation Center (University of Kentucky) uknowledge.uky.edu/ktc_researchreports/1572 Checked 2026-10-11.

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