Tools for Estimating

These are the voids created by various sizes of steel forms. 

Cubic Feet of Void Created per Linear Foot
Depth of
Steelform		 30″ Width 20″ Width 15″ Width 10″ Width
8″ 1.628 1.072 .794 .516
10″ 2.023 1.329 .982 .634
12″ 2.414 1.581 1.162 .748
14″ 2.801 1.829 1.343 .857
16″ 3.183 2.072 1.516 .961
20″ 3.933 2.544 1.850 1.155