Which plan shows a top view of the building as if the top was cut off (cross-sectional)?

The floor plan represents a top view of a building, illustrating the layout of rooms, walls, doors, and other features as if the top of the building were cut off at a specific height. This view allows one to see the spatial arrangement and dimensions of different areas within the structure, making it essential for understanding how the space is organized and utilized.

Other plans mentioned serve different purposes. For example, a mechanical plan focuses on mechanical systems within the building, such as HVAC, plumbing, and electrical layouts, without providing a general overview of the entire building’s layout. A foundation plan details the specifics of the building's foundation, including its dimensions and reinforcement but does not provide an overview of the interior spaces. An elevation plan, on the other hand, shows the building's vertical aspects and does not depict the top-down view needed for understanding the layout of floors and rooms. Thus, the floor plan is the specific choice for viewing the building's layout as if the top was removed.