The minimum distance between the centers of bulb of diameter du, of a multi under reamed piles, is

The minimum distance between the centers of bulb of diameter du, of a

1.	The minimum distance between the centers of bulb of diameter du, of a multi under reamed piles, is
A.	.35 du
B.	.25 du
C.	.5 du
D.	.75 du
Answer» D. .75 du

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The minimum distance between the centers of bulb of diameter du, of a multi under reamed piles, is

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