Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Components (hierarchy name)
4. components (objects parts)
5. [components by specific context]
6. architectural elements
7. circulation elements
8. [stairs and stair components]

Anotations

Scope note:

Areas or constructions comprising one or more flights of stairs, with the necessary landings and connecting platforms to form a continuous and uninterrupted passage from one level to another, as defined by the International Code Council.