Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Components (hierarchy name)
4. components (objects parts)
5. [components by general context]
6. fasteners
7. hangers (fasteners)
8. [hangers by location or context]

Anotations

Scope note:

Hangers used for heavy exterior sliding or rolling doors, consisting of two pulleys secured to the top of the door in tandem, connected by a heavy metal strap. The door is moved by rolling along a horizontal track which either hangs from the lintel or is anchored to a parallel member projecting slightly from it.