How Much Concrete for a Column Footing?
A 3×3 foot footing provides substantial bearing area for structural columns supporting beams, porches, or building corners. The 12-inch depth works in areas with shallow frost lines. This size handles concentrated loads from posts carrying significant roof or floor weight.
Results
Total Volume0.37cubic yards
Total Volume9.9cubic feet
80 lb Bags17bags
60 lb Bags22bags
40 lb Bags34bags
Net Volume (before waste)0.33cu yd
Waste Allowance10%
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