What is a spread footing?
Concrete spread footing width and depth can differ depending on a number of facts.
The concrete footing is the element of the house assembly which transfers and distrubutes the structural load (live and dead) into the undistrubed soil or compact granular.
Concrete footing width and depth can differ depending on a number of facts such as
Soil load bearing capacity
Height and depth of foundation wall
A residential footing can be consturcted with
pressure treated wood
However, the most commonly used type of footing is the poured concrete spread footing.
Poured Concrete and Rebars
A poured concrete footing offer a much more uniform surface for constructing the foundation wall.
Also because of the compressive strength that is charateristic of poured concrete footing, less material can be used to create a footing with sufficent strength to transfer loads to the soil.
Concete footings are known for its compressive strenght, but the reality is, concrete footing would fail due to lack of tensile strenght
The higher tensile properties a concrete footing is poured at, the high its resistance to bending stress.
The concrete compressive properties allows the footing to withstand significantly more compressive forces than an other building material, but concrete has one flaw, it's not flexable and must be reinforced with rebars to withstand bending loads.
Reinforcing a footing may not be required for the most part, but it always make sense. It's better to be saft than sorry.
Go Back Home or Top of page Spread Footing
Go To Concrete Footing Loads