What does a dashed line represent in a blueprint?

A dashed line in a blueprint is used to indicate hidden lines or elements that are not visible from a certain viewpoint. This convention helps architects, engineers, and builders understand what exists behind or within a structure without requiring additional drawings or documents. For example, dashed lines may represent pipes, wiring, or structural elements that are concealed within walls or floors. This visual representation is essential for accurately interpreting how different elements interact within the construction, aiding in both the design and construction phases. By following these conventions, anyone reading the blueprint can more effectively gauge the layout and structure's complexities.