Why do construction plans typically include a legend?

Construction plans commonly include a legend to clarify symbols, lines, and notations used in the drawings. The legend serves as a key that provides essential information about what each symbol or line type represents, ensuring that anyone reviewing the plans can accurately interpret the design intentions of the architect or designer. This is particularly important because drawings often use a variety of symbols to represent different elements such as walls, doors, windows, and electrical components. Without a legend, it could lead to misunderstandings and errors during the construction process, making effective communication critical for the accurate execution of the project.

While the other options relate to various aspects of construction documentation, they do not pertain to the specific function of a legend in plans. A list of subcontractors, project milestones, or financial requirements is typically found in other documents and not within the construction drawings themselves.