Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Built Environment (hierarchy name)
4. Single Built Works (hierarchy name)
5. single built works (built environment)
6. [single built works by specific type]
7. [single built works by function]
8. transportation structures
9. [transportation structures by function]

Anotations

Scope note:

Towers, often temporary structures, that are constructed for or used to provide support and upright stability on the ground or a launch pad for a rocket, missile, space craft, or other object or vehicle, which is intended to be launched into the air or space; particularly applied to towers constructed for unguided rockets in order to guide the rocket until it reaches speeds fast enough for aerodynamic stabilization to take effect.