According to established architectural and interior design drafting conventions, such as those outlined in the U.S. National CAD Standard® (NCS), elements designated for removal or demolition are represented by dashed lines. This distinct line type ensures clear communication on construction documents, differentiating items to be removed from existing construction (typically shown with light, solid lines) and new construction (shown with heavy, solid lines). The use of a standardized dashed line prevents ambiguity and costly errors during the demolition and construction phases of a project.

A. Dotted line: While visually similar, "dashed line" is the more precise and formally recognized term in drafting standards for representing demolition.

B. Solid, heavy line: This line type is the standard convention used to indicate new walls and other new construction elements.

D. Long and short dashed line: This specific pattern, often called a "centerline," is used to indicate the center of an object, an axis of symmetry, or column lines.

1. Ching

F. D. K. (2015). Architectural Graphics (6th ed.). John Wiley & Sons. In Chapter 5

"Architectural Drawing

" the section on drawing conventions illustrates and describes the use of dashed lines to indicate elements to be removed in demolition plans (pp. 168-171).

2. National Institute of Building Sciences. (2014). United States National CAD Standard® (NCS) V6

Uniform Drawing System (UDS)

Module 03 - Terms and Abbreviations. The standard defines "DEMO - Demolition" and the associated line styles in subsequent modules on drafting conventions show a dashed pattern.

3. Packard

R. T.

& The American Institute of Architects (Eds.). (2007). Architectural Graphic Standards (11th ed.). John Wiley & Sons. The section on "Construction Documents

" specifically under "Demolition Drawings

" specifies the use of dashed lines for indicating items to be removed. (Section 1.1

pp. 6-7).