Which component of space is a horizontal plane located overhead?

The term that describes a horizontal plane located overhead is the "Overhead plane." In architectural terms, this refers to the concept of space in which the ceiling or any surface extending horizontally above an area defines the volumetric limits of that space.

Understanding the overhead plane is crucial in architecture, as it plays a significant role in concepts like spatial perception and the overall design of a building. It affects how light enters a space, the acoustics within a room, and even the materials chosen for a ceiling to create specific atmospheres.

In architectural theory, the overhead plane distinguishes itself from other planes. The vertical elements refer to walls and columns that provide structure and support, while the base plane is typically associated with the floor level. The ground plane is another term often used to describe the surface on which a structure rests or interacts with the outdoors, generally related to foundation or landscaping. Each of these definitions emphasizes different spatial conditions and geometries, but none denote the specific term used for a horizontal plane located overhead.