At what height is the cutting plane for a floor plan generally taken?

The cutting plane for a floor plan is typically established at a height of 5 feet above the floor. This standard practice provides a consistent view that captures the layout of the space and critical details without being overly obstructive. Setting the cutting plane at 5 feet allows for a clear representation of elements like doors, windows, furniture, and fixtures, which are generally positioned within that vertical range. This height also mimics the average eye level of a person standing in the space, thus enhancing the comprehensibility and practicality of the floor plan for users, such as architects, builders, and clients.

Other options do not align with conventional practices in architectural drafting. For instance, a cutting plane at the floor level would obscure important details above the ground. Conversely, a plane positioned just below the floor would provide an inaccurate depiction of the space, and selecting any arbitrary height lacks the standardization necessary for effective communication of design intent.