Determine the amount of backfill needed for the basement in Problem 33. Ignore any backfill inside of the walls.
What will be an ideal response?
From Problem 33 the depth of excavation was 8.333 ft and quantity of excavation was 508 bcy. Find the volume of the basement:
Building area = 40? × 30? – 15? × 10? = 1,050 sf
Building volume = 1,050 sf × 8.333? = 8,750 cf / 27 cf per cy = 324 cy
The corners of the footings will be added to the top and bottom sides.
Footing length = 30? + 26?4? + 10? + 15? + 20? + 41?4? = 142?8?
Footing volume = (142?8?) × 10? × 8? / (12 in per ft)2 = 79 cf / 27 cf per cy = 3 cy
Find the volume of the backfill. The backfill will be in compacted cubic yards (or feet).
Backfill (bcy) = 508 bcy – 324 cy – 3 cy = 181 ccy
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