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. [openings and opening components]
8. openings (architectural elements)
9. [openings by form]
10. [gateways and gateway components]
11. gateway components
12. [gates and gate components]

Additional parents:

1. top of the aat hierarchies
2. Objects Facet
3. Built Environment
4. Single Built Works
5. single built works
6. single built works by specific type
7. single built works by function
8. gate structures

Narrower term/s

• lich gates
• portcullises
• sluice gates
• dog gates
• floodgates (lower gates)
• cancellettos[+]
  • cancelletti di balaustrata
• starting gates
• dvāra-gōpura
• dvāramaṇḍapa

Anotations

Scope note:

Swinging or sliding barriers used to fill or close a gateway between two spaces or placed within a wall or fencing, often exterior and often made of a grating or open framework or forming a heavy or rough structure. For barriers of more solid and finished construction and usually leading to interior spaces, use "doors." For more substantial structures, whether or not they include an actual barrier, see various types of "gate structures."