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]
9. stair components
10. strings (stair components)

Narrower term/s

• open strings

Anotations

Scope note:

Outer strings on stairs, usually of better material or finish than the carriage pieces which they cover; may be part of the actual construction or applied to the face of the supporting member.