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Articles & Tips. Under every house is a foundation, and under most foundations are footings. Most of the time we take footings for granted, and usually we can: For typical soils, a common 16- or 20-inch-wide footing can more than handle the relatively light weight of an ordinary house.

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Building Code Foundation Requirements TopicRequirement or RecommendationFooting depth12 inches minimum depth or below frost line.Footing width12 inches minimum.Footing level, topAlways level.Footing level, bottomUp to 10-percent slope.5 more rows • Mar 29, 2023

The width of the wall footing is generally 2-3 times the width of the wall. The wall footing can be constructed from stone, brick, plain concrete, or reinforced concrete.

All footings should be a minimum of 150mm (6") in depth, with the bottom 350 - 400mm (14-16") below ground level on most soils. For clay soil however, thicker and deeper footings should be used.

All internal foundations are to be the same thickness and depth as the external wall foundations. Depth Depth of foundation excavation to be at least 600mm below ground level at completion. Width Foundation must be at least 3 times the width of the wall it supports. Thickness Concrete to be at least 300mm thick.

Building footings is usually the first step in construction after the excavation is complete. The hole for the footing must be dug first, and then the footing itself must be created. The depth of the footing hole depends on the type of soil and the size of the building.