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. [structural elements and components for structural elements]
8. structural elements
9. enclosing structural elements
10. [walls and wall components]
11. wall components
12. [wall components by location or context]

Anotations

Scope note:

Refers to blocks of stone placed in masonry walls under girders or other beams or trusses in order to distribute the load; for shaped stones placed on sloping walls to support the copings of gables, use "kneelers (gable components)."