National Highway Institute (NHI) Safety Inspection of In-Service Bridges Final Assessment Practice Exam

Elastomeric bearings are favored in new bridge construction largely due to their remarkable deformation properties, which allow them to effectively accommodate movements caused by temperature changes, load variations, and differential settlement. These bearings are made from layers of rubber that can withstand significant shear forces while maintaining their shape and integrity under load. Their flexibility ensures that they can absorb vibrations and deformation without damage, which contributes to the longevity and maintenance of the bridge structure. This unique ability to deform and return to its original shape is essential for maintaining the structural integrity and performance of bridges in various environmental conditions.

While other types of bearings may serve specific functions, none can match the adaptability and shock-absorbing qualities of elastomeric bearings in modern bridge design.