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. built work divisions
7. rooms and spaces
8. [rooms and spaces by function]
9. protective spaces

Anotations

Scope note:

Rooms, usually above ground, intended for the protection of people from danger, such as from storms or violence. For below ground spaces for protection from tornadoes and other wind events, use "storm cellars."