What does a scheme line indicate in architectural drawings?

A scheme line indicates a layout plan or a boundary in architectural drawings. It serves as a reference point that provides a visual guideline for the arrangement of components within a space, helping to define the overall structure and organization of the design. This line can represent different aspects of the design, such as the limits of a particular area, the relationship between various elements, or the alignment of features within the layout.

For instance, in a floor plan, scheme lines may outline the space designated for rooms, corridors, or other functional areas, thereby establishing a clear framework for further details and dimensions. The use of scheme lines ensures that the architectural design is coherent and that all features are properly organized within the specified layout, facilitating easier understanding and communication among stakeholders involved in the project.