A widened concrete base at the bottom of a column or wall that spreads weight over a larger area of ground.
A concrete element at the base of a foundation that spreads column, wall, or pier loads over a larger area of soil to reduce bearing pressure. Footings are typically wider than the element they support and are reinforced with steel rebar. Spread footings, continuous wall footings, and combined footings are common types.
Footings are a high-uncertainty cost item because they depend on soil bearing capacity that may only be confirmed once excavation exposes actual conditions. Estimators must reconcile the geotech report against plan dimensions, since over-excavation, unsuitable soil removal, or upsized footings from a revised design can swing concrete, rebar, and labor quantities significantly mid-project.
After reviewing the geotech report showing weak soils, an estimator increased the spread footing takeoff from 24-inch to 36-inch widths and added a unit price for unsuitable-soil removal so the bid wouldn't expose the firm to over-excavation costs.
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