Details regarding the interior layout of walls are commonly found in which type of drawing?

The correct choice is based on the role of floor plans in architectural and construction drawings. Floor plans serve to provide a detailed view of the layout of a building from a top-down perspective, showing the arrangement of rooms, walls, doors, and windows. They highlight the interior dimensions and spatial relationships between different areas within the structure, allowing for an understanding of how the spaces will function together.

In contrast, section drawings offer a cut-through view of a structure, emphasizing vertical relationships and how different levels relate to one another rather than the overall layout of walls and spaces on a single level. Elevation drawings focus on the exterior view of a building, showing the facade and height, while site plans depict the overall layout of a property, including the building's placement relative to the lot and surrounding features, but do not provide detailed information on the interior layout of walls. Therefore, floor plans are the most suitable choice for understanding the interior layout in detail.