What is the maximum movement accommodated by a pourable joint seal?

Pourable joint seals are typically designed to accommodate movement within specific limits, which ensures that they function effectively over time. The maximum movement accommodated by a pourable joint seal is generally around 1/4 inch. This figure reflects the typical range of expansion and contraction that can be expected in joints under standard loading and environmental conditions.

Choosing this maximum movement is crucial because it balances the durability and performance of the seal while taking into account the potential displacements that can occur due to thermal expansion, vehicular load, and other factors affecting bridge components. Understanding this limit helps in choosing the appropriate joint seal for different bridge applications, ensuring that the seal can maintain its integrity and effectiveness without excessive wear or failure.

In contrast, the other options represent maximum movements that exceed the practical capabilities of standard pourable joint seals, leading to potential failure or loss of sealing effectiveness in real-world applications.