A floor plan.
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2 inches of floor
One or more floor of a building that are completely below the ground floor is basement. A floor of a building that is half below ground, rather than entirely such as a basement is semi basement.
A floor plan is a visual representation of the layout of rooms, spaces, and features inside a house. It shows the relationships between different areas and helps to understand the overall design of a building.
A builder floor apartment is one wherein the builder buys a piece of land, constructs flats in the form of a building, and sells out one or more of them. Principally there is no difference between a builder floor apartment and residential apartment, in case one is opting to buy a flat or apartment.
It crashed between the 79th and 80th floor on July 28, 1945.
Its really the 13th floor of the building because M is the 13th letter.
It is called bridging.
It's impossible to determine how many people have made it through the 13th floor as it varies from building to building. In some cultures, the 13th floor is avoided due to superstitions, while in others it is commonly included in building designs.
For instance a tall light house building has only one floor while Empire State Building (a multi storey building) has 102 floors.
A 'storey' is a floor of a building, so a single storey is a one-floor house or building.