Why are there spaces between slabs of concrete in city sidewalks?

What is the purpose of the spaces between slabs of concrete in city sidewalks?

- To accommodate thermal expansion and contraction
- To prevent damage
- To maintain pedestrian safety

Answer:

Spaces between concrete slabs on sidewalks are designed to accommodate thermal expansion and contraction caused by temperature changes, preventing damage and maintaining pedestrian safety.

Spaces are placed between slabs of concrete in city sidewalks to allow for thermal expansion and contraction, which occurs due to changes in temperature. Without these spaces, also known as expansion joints, sidewalks could crack or become uneven as the concrete slabs expand and push against each other or contract and pull away, creating unsafe walking conditions. In a bustling city like New York, the steady flow of pedestrians requires that sidewalks remain safe and functional despite temperature fluctuations. Similarly, urban environments often repurpose existing spaces, like transforming parking lots to meet parking demand or using public squares for events, demonstrating the adaptability in the use of space.