Concrete Footing Design
When designing a structure’s foundation, it’s important to take into account the soil’s bearing capacity when designing the footing. The lower the bearing capacity of the soil, the wider the footing needs to be to offset the reduced capacity.
If the structure is going to reside on expansive soil or soil with low bearing capacity, additional foundation support may need to be designed to prevent structural damage. Deep foundations can minimize or eliminate structure settlement or problems caused by expansive or weak soil.
Minimum Widths of Concrete & Masonry
Load-Bearing value of soils (psf)
Conventional wood frame construction
4" brick veneer over wood frame or 8" hollow concrete masonry
8" solid or fully grouted masonry
Table source: Table 403.1; CABO One and Two Family Dwelling Code; 1995