What does a dashed line typically represent in blueprints?

A dashed line in blueprints typically does represent hidden elements or features. This is a standard convention in architectural and engineering drawings that helps convey information about components that are not visible in the current view or layer of the drawing. For example, dashed lines may indicate pipes, ducts, or other hidden structural elements that might be concealed behind walls or other parts of a structure.

By using dashed lines, designers and engineers can present a clearer and more comprehensive view of a project without cluttering the main drawing with unnecessary details. This allows those reviewing the plans to understand not only the visible features but also those elements that are essential for the overall design and functionality of the project without having to reference separate drawings.

In the context of the other options, structural supports and beams are typically represented by solid lines, as they are key elements that are visible and require clear depiction. Electrical wiring connections also often have their own unique line styles, typically using solid or dash-dotted lines, and dimensions or measurements are usually indicated with specific symbols and solid lines. The use of dashed lines specifically aligns with the representation of hidden elements, making it the correct choice in this context.