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RE: depth of footing above bottom reinforcement

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I would disagree and say it is a just a dimension/distance value of 6 inches or 12 inches and has nothing to due with "d" (i.e. distance from extreme fiber.....).  So if you had a pile cap with #8 bar each way for bottom reinforcement and 4 inches of cover then your overall depth (h) of the pile cap would need to be a minimum of 18 inches (4" clr + 2 -#8 bar + 12").

Thomas Hunt, S.E.

"David Fisher" <dfisher(--nospam--at)>
10/29/2008 12:55 PM
Please respond to seaint
RE: depth of footing above bottom reinforcement

“d” as per ACI 318.
David L. Fisher SE PE
Fisher and Partners - Cayman
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From: Christopher Banbury [mailto:christopher.banbury(--nospam--at)]
Wednesday, October 29, 2008 1:39 PM
depth of footing above bottom reinforcement

ACI 318 15.7 - Minimum footing depth
Depth of footing above bottom reinforcement shall not be less than 6 in. for footings on soil, nor less than 12 in. for footings on piles.
Does "depth of footing" refer to 'd' as defined by 318 or Df as used in foundation design?

Christopher & Shannon Banbury
PO Box 12347, Brooksville, FL,34603
(352) 797-9200

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