What type of plan provides details on the structural supports of a building?

The foundation plan is essential because it outlines the layout of the building’s foundation and specifies details about the structural supports. This plan illustrates where support columns, bearing walls, and footings will be placed, as well as how they interact with the overall structure. This information is crucial for ensuring that the building is safely and securely supported, especially in regard to load-bearing capacities and soil conditions.

In contrast, an elevation plan provides views of the building's exterior from various angles, focusing more on aesthetics and design rather than the structural aspects. A site plan illustrates the entire property, including how the building is positioned relative to other structures and property boundaries, but it does not delve into the detailed structure of the building itself. A detail plan showcases specific elements or areas of a construction project, often providing close-up views of intricate features rather than the overarching structural supports of the entire building.