How Footings Work In A Foundation
A footing in construction is the lowest part of the foundation that makes contact with the ground.
Without it the structure will eventually settle and fall apart.
Usually made with concrete and rebar, they are placed underneath loadbearing walls to distribute the weight of a house or a building.
Trench footers like these are dug into the ground using a backhoe or an excavator.
The ditch itself becomes the form for the concrete.
Footings, sometimes called footers, can also be formed using 2 x 10 s or other materials like Form-a-drain.
It’s critical that footings be placed on original undisturbed ground that can support the weight of the structure.
The bottom of the footing must be lower than the lowest depth that the ground can freeze in your region.
If the ground freezes below the footing it can actually lift the entire house and cause major structural damage.
Rebar is placed horizontally in footings to give the concrete tensile strength and is held up off the ground with chairs.
Vertical rebar can also be placed into footings leaving part of it sticking out. This part eventually becomes poured into the foundation walls tying the two together.
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