Concrete Usage Table
This table lists the amount of concrete needed (redi-mix or bags) for each SquareFoot™ footing form. The Calculator below is based on this usage table.
|Model||Redi-Mix Concrete||60 lb. bags||80 lb. bags|
|SF 22||2.00 cubic feet||4||3|
|SF 28||4.50 cubic feet||9||7|
|SF 32||7.00 cubic feet||14||11|
Note: Yields are approximate; do no under-order. Most concrete trucks carry between 7-9 Cubic Yards. 1 cubic yard = 27 cubic feet. Concrete shall have a minimum of 3000psi 28 day compressive strength and consist of not more than 3/4 inch (1.91 cm) aggregate. Recommended slump of 5" (12.7 cm) to 6" (15.24 cm).
Concrete conversion: 60lbs (25 kg) = 0.50 ft3 (0.056m3), 80lbs (30 kg) = 0.66ft3 (0.018m3), 1 yard = 27 ft3 (0.76 m3).