What is the primary reason for checking concrete decks over supports?

The primary reason for checking concrete decks over supports is to detect cracks, spalls, and crushing. This inspection is critical because concrete decks serve as a fundamental component of bridge structures, bearing loads while also providing structural integrity. Over time, the concrete can suffer from deterioration due to factors such as environmental exposure, freeze-thaw cycles, and sustained heavy traffic.

Identifying cracks is essential as they can indicate structural problems that may compromise the safety of the bridge. Spalls—areas where the surface of the concrete has broken away—can also signal underlying issues that need to be addressed to prevent further damage. Crushing refers to the failure of concrete under load, which can occur if the material is weakened or if the design load exceeds the concrete's capacity.

By thoroughly inspecting concrete decks, engineers can ensure that any potential issues are identified early, allowing for timely maintenance or repairs that can extend the life of the bridge and enhance safety for users.