Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Built Environment (hierarchy name)
4. Single Built Works (hierarchy name)
5. single built works (built environment)
6. [single built works by specific type]
7. [single built works by function]
8. transportation structures
9. [transportation structures by form]
10. bridges (built works)
11. [bridges by form]
12. truss bridges

Anotations

Scope note:

Fixed bridges that extend without hinges or joints across three or more supports, making them capable of resisting bending and shearing forces at all sections throughout their length; continuous bridges are firmly supported in the perpendicular direction by piers and abutments.