An expansion joint is a structural element that allows for the movement of building components and materials due to thermal expansion, contraction, and various other environmental factors. These joints are designed to absorb the relative movement caused by temperature changes, seismic activity, settling, or vibration, thereby preventing damage to materials and structures. Expansion joints are commonly used in a variety of applications, including: 1. **Bridges**: They accommodate movement caused by temperature changes and traffic loads.
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