What are expansion joints and their significance in construction?

Expansion joints are critical components in construction, specifically designed to accommodate the natural movements that occur in materials due to temperature fluctuations. As materials heat up, they expand; when they cool down, they contract. This movement can lead to significant stress on structures if not properly managed, resulting in cracking and other forms of damage. By incorporating expansion joints, engineers and architects create designated spaces that allow for this movement, ensuring that the integrity of the structure is maintained over time. This preventative measure not only enhances the durability of the building but also contributes to its overall safety and longevity.

While expansion joints do play roles in various other building functions, their primary and most significant purpose is to permit controlled movement in a safe manner.