Step by Step This video will show you the different types of foundations that are commonly used in residential and commercial construction.  some of these foundations are:

Slab on Grade:
The most typical type of foundation, consist on a footing that surrounds the perimeter of the structure and is covered by a slab set on grade.

Used to support posts, these are footings for above grade that hold posts for above grade structures like modular buildings, mobile homes, trellises, patio covers and etc.

Wall foundation:
Used on retaining walls, restraining walls and perimeter walls for modular and above grade buildings.  these types of footings are usually built  in combination with masonry or brick walls.

These footings are used to support heavy loads that will sit on a single bearing point. for example, support beams, front porches, etc...

Types of Foundations

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