How to develop concrete footing for a building
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This construction video is based on how to pour concrete foundation for constructing a building as well as plumbing and house framing. Learn how to set something like a plumbing pipe sleeve properly in the footing.
Footings are vital part of foundation construction. Footings are generally formed with concrete containing rebar reinforcement that is poured into an excavated trench. The footings are developed to provide support to the foundation and stop settling.
Footings are specifically designed for the areas where soils are hard or rough. A footing must be at least 8 inches thick and twice as wide as the wall or posts it will support. A concrete is blended with 1 part cement : 2 parts sand : 4 parts coarse aggregate (by volume) for footings. Concrete must be arranged within half an hour of mixing.
A concrete footing is 100mm deep by 300mm wide if the footing is needed for a free standing wall. The footing is extended to 150mm deep and 450mm wide, if the wall already built, is a retaining wall.