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Superstructures (Pbpbyp)

All those parts of a structure above the bearings of simple and continuous spans, skewbacks, or arches and tops of footings of rigid frames; excluding backwalls, wingwalls, and wing protection railings. Also, structural parts of the bridge that comprise the horizontal span. (Source: AASHTO Glossary)
Broader Term
Structural members by elevation (Pbpby)
Related Terms (Hierarchical)
Substructures (Pbpbyb)