Final answer:
The maximum spacing for expansion joints in sidewalks is usually 20 to 30 feet. This allows for the natural expansion and contraction of the concrete due to temperature changes, preventing cracks and maintaining the structural integrity of the sidewalk.
Step-by-step explanation:
The maximum spacing for expansion joints in sidewalks varies, but a common guideline is to have a maximum spacing of 20 to 30 feet between expansion joints. This allows for the natural expansion and contraction of the concrete due to temperature changes, preventing the formation of cracks.
By having expansion joints at regular intervals, the stress caused by temperature changes is distributed across multiple joints instead of being concentrated in one area. This helps to maintain the structural integrity of the sidewalk and prolong its lifespan.
Spacing expansion joints too far apart can lead to the formation of larger cracks and potential damage to the sidewalk over time. Therefore, it is important to follow the recommended spacing guidelines to ensure the durability of the sidewalk.