footing

In construction, a footing is a crucial part of a building's foundation. Its primary role is to transmit the building's loads to the earth in a stable manner. To prevent damage from frost, the footing must be placed below the maximum winter frost level.12

For low-rise residential buildings, spread footings are commonly used. These are wide bases, typically made of reinforced concrete, that support walls or piers and distribute the load over a larger area. If a building lacks a basement, a concrete grade beam supported by isolated footings, piers, or piles may be used at ground level to support exterior walls. For heavier loads, such as in commercial or industrial buildings, more robust foundation systems like piles or caissons are employed. In very soft soil where even friction piles are insufficient, a floating foundation may be used, essentially buoying the structure with the displaced earth.123