What type of drawings provide information about floor sizes?

The correct choice provides an essential representation of a building's internal configuration. Floor plans are detailed drawings that illustrate the arrangement of rooms and spaces within a building from a top-down perspective. They typically include dimensions, which indicate the sizes of various areas, including the length and width of rooms, the location of walls, doors, and windows, and often details like furniture arrangements. This information is vital for understanding the spatial relationships and functional layout of a building, which is particularly important in fire inspection and safety assessments.

Other types of drawings mentioned offer different types of information. For instance, layout diagrams might show the placement of furniture or equipment but do not typically include exact dimensions or floor sizes. Elevation drawings depict the exterior views of a building, illustrating heights and architectural details rather than internal floor layouts. Site maps provide an overview of the geographic area surrounding the building, showing its footprint in relation to other structures and land features, but they do not convey the internal dimensions of the building itself.