Using a waste factor of 8 percent, determine the number of cubic yards of concrete needed to pour two of the spread footings in Figure 11.40.
What will be an ideal response?
Find the volume of concrete as follows:
Volume of concrete (cy) = 2 × 30? × 30? × 10? /(12 in per ft)3 = 10.42 cf / 27 cf per cy
Volume of concrete (cy)= 0.39 cy
Add 8% waste and round off.
Volume of concrete (cy) = 0.39 cy × 1.08 = 0.42 cy – Use 0.5 cy
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