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re: pipe penetrating a ftg

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Another common detail for utility penetrations of a footing is just have them form and pour the footing over top of the pipes, leaving several inches between the pipes and the B/o ftg, and detail the rebar like you would a step footing. The footing will act as a grade beam over a very small span, or more accurately with an arch. Then if they ever have any issues, they can just dig down below the footing and do whatever they need to do without being tied into the sleeve. Let the contractor figure out how they want to form and pour, they may use loose soil, wood or foam... means and methods.
Andrew Kester, P.E.
Orlando, FL
N:Andrew Kester;PE
FN:Andrew Kester, PE