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).