Final answer:
Engaged columns are not free-standing but become part of the wall they support. They are accompanied by an entablature and play a crucial role in the structural and aesthetic aspects of Classical architecture.
Step-by-step explanation:
The columns mentioned in the question are referred to as engaged columns. These columns are not free-standing but become part of the wall they support. In architecture, they are often found in Classical orders and are accompanied by an entablature, which supports the roof.
Engaged columns are made up of three main components: the cornice, frieze, and architrave. These components are arranged from top to bottom and provide structural support and aesthetic appeal to the overall design.
Changes in the design, dimensions, or materials of engaged columns are usually listed in ruled columns next to the title block of architectural plans or drawings.