Determine the amount of backfill needed for the continuous footing and foundation in Problem 39. From Problem 39 the depth of excavation was 2.5 ft, the length of the wall was 174 ft, and quantity of excavation was 127 bcy. Find the volume of the footing and foundation:
What will be an ideal response?
Footing volume = 174? × 2.5? × 1?2? = 507 cf / 27 cf per cy = 19 cy
Foundation volume = 174? × 1?4? × 10? = 193 cf / 27 cf per cy = 7 cy
Find the volume of the backfill. The backfill will be in compacted cubic yards (or feet).
Backfill (ccy) = 127 bcy – 19 cy – 7 cy = 101 ccy
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