Types of Commercial Foundations

Commercial buildings need foundations that can support the weight they will bear and withstand any temperature changes. The foundation of a commercial building has a large amount of pressure exerted on it. This makes the foundation more susceptible to damage. The foundation of a commercial building has an important role to play, so it’s important to choose the correct one. Here are the types of commercial foundations used for commercial buildings:

Footing Design Foundation (T-Shaped Footing)

This type of foundation design is the most commonly used when dealing with tall buildings and areas where it is likely to freeze. Frozen ground will exert extreme pressure on the foundation. The T-shaped foundation is designed so that it can resist damage from the pressure. With footing design foundations, footings are installed beneath each column of the building just below the frost line. Pilasters will stretch to the bottom of each column. One continuous wall beam or wall will connect all the pilasters. Concrete is then poured between the beams to fill in the space. The T-shape of the foundation provides not only protection from frost, but great stability for the building.

Slab on Grade Foundation

Slab on grade foundations are also commonly used foundation design for commercial buildings. Slab on grade is also known as thickened edge design and is used for smaller commercial buildings and in areas where the ground will not freeze. The slab for this foundation is made of one layer of concrete that is several inches thick. There is also a frost protected slab on grade where the concrete is insulated with two layers of polystyrene sheeting. The frost protected slab on grade is effective for commercial buildings in colder climates.

Floating Slab Foundation

The floating slab foundation is a variation of the slab on grade foundation. The slab of this foundation is not directly in contact with the ground, but is secured by concrete layers several millimeters above it. Its reinforcement will be found at the bottom or under the steel columns. This type of foundation is commonly used for manufacturing workshops and sheds. It is an economical choice when it comes to foundations and a decent choice for smaller commercial buildings.

Pier, Footing and Grade Beams

For steel buildings, especially ones used for agricultural purposes, pier, footing, and grade beams are a common choice. Piers are installed on footings, which feature a grade beam wall. The foundation itself sits on top of the piers. This type of foundation allows for a greater variety of site locations. It’s possible to relocate with this type of foundation also, hence it’s popularity with agricultural buildings. Drilled piers have vertical piers instead of footings. The drilled piers are placed deep into the dense sand or glacial till.

The design and type of foundation used for a commercial depends on a few factors including how tall the building in, the climate of the area, and the type of soil that is found under the building. The foundation of a commercial building is extremely important as is it bears a lot of weight.


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