elevations of only part of a structure. For drawings showing a structure as partly an exterior elevation and partly an interior elevation, use "sectional elevations"

drawings, prints, or other media in which the projectors are perpendicular to the plane of projection (drawing surface), that is, a three-dimensional object is shown fully frontally at all points, with no indication of recession into depth

drawings done early in a design process for art or architecture. They are typically more finished than sketches

Drawings that pertain specifically to the structural layout of a building.

sections taken along the principal organizational axis of a structure or object

drawings of the mechanical systems of buildings (e.g., HVAC and plumbing systems)