A foundation plan is a drawing or illustration that shows the footings, piers, or structural underpinnings needed to support the building. It provides all the information needed to prepare a strong base in which to build your home. Several factors come into play when determining which foundation to use. Depending on where you build, only certain types of foundations can be used. For instance, areas near the ocean are not ideal for basement foundations. Another governing factor is the make-up of your house site plan. The grade of the land or slope of the lot dictates what foundation type would be best to use. Other things that may affect your foundation choice include soil conditions and building codes.
There are typically three foundation types in which a home is built on. The least complex of the three is called a slab or monolithic foundation. The second type is known as a crawlspace which has pier support. The third foundation type is known as a basement which is generally beneath ground. Each one has its own need and purpose when it comes to building your home. Listed below are the different foundations found in a set of house blueprints.
Crawl Space Foundation
In the case of either foundation, the page may also consist of sectional details of the foundation to illustrate further clarity if space permits. If not, they are shown on one of several architectural detail sheets. These details show the foundation as if it was cut through a section to view how it is put together. You also see this type of cut-through for the foundation on the "building section" sheet as well.