What should an inspector look for when assessing the bridge superstructure?

When assessing the bridge superstructure, it is crucial for the inspector to focus on signs of deformation, cracking, and corrosion. These indicators are essential for determining the overall structural integrity and performance of the bridge. Deformation can reveal issues related to load-bearing capabilities or stress that the structure is experiencing. Cracking can signify material fatigue, insufficient design considerations, or developmental issues from environmental factors, while corrosion affects the strength and durability of metallic components within the superstructure.

Detecting these conditions allows the inspector to identify potential problems early, which is vital for ensuring safety and planning necessary maintenance or repairs. While aspects such as the condition of paint, presence of expansion joints, and height of the bridge span may support an inspection, they do not provide the same direct insight into the structural health of the superstructure, which is why a comprehensive assessment should prioritize deformation, cracking, and corrosion.