The cutting plane for a floor plan is generally taken how high above the floor being shown?

In architectural drawings, a cutting plane indicates the level at which a building or structure is to be 'cut' to show a cross-section, which helps in visualizing the interior details. For floor plans, the cutting plane is typically established at a height that reflects standard human proportions and sightlines, allowing for clarity in representing spaces and functionalities.

The conventional height for the cutting plane in floor plans is 5'-0". This height is chosen because it typically represents the average eye level of a standing adult, accommodating sightlines to view architectural features comfortably. By establishing the cutting plane at this height, the resulting section drawings provide effective visual information regarding the vertical proportions of walls, ceilings, and other features within the space.

While the other heights offered might be relevant in specific contexts or applications, they do not align with the standard practice for a cutting plane in residential or commercial floor plans. Thus, 5'-0" is recognized as the most appropriate choice for accurately conveying the design and spatial relationships within the depicted area.