What does the term "elevation" refer to in blueprints?

The term "elevation" in blueprints specifically refers to a drawing that illustrates the vertical elements of a structure. This type of drawing provides a view of the building from one side, showing features such as windows, doors, and the overall height and proportions of the facade. Elevations are crucial for understanding the design and appearance of each face of a building, as they convey detailed information about architectural features and relationships between different elements.

While other options touch upon different aspects of blueprints, they do not correctly define "elevation." For instance, a horizontal section of a structure is described by the term "section," which provides a view of the interior layout and provides insights into the spatial organization of the building's components. A graphical representation of the structure's materials typically would be found in other drawings or notes rather than specifically in an elevation drawing. Lastly, a summary of building specifications would be relevant in construction documentation but serves a different purpose from what an elevation represents. Consequently, the definition provided by the correct answer aligns directly with the established terminology used in architectural drawings.