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Encased duct analysis

Encased duct analysis

RE: Encased duct analysis

If you have any soil on top of the duct bank, or traffic over, then the 22' span between piles may be pushing it... I would treat it as 2 - 8" or 10" wide beams with a single leg stirrup for shear reinforcing.

Dik

RE: Encased duct analysis

A few thoughts...
[ul]
  • treat it as a continuous beam, with 22' spans
  • analyze like a prestressed box beam, just ignore the prestressed parts of the equations, or
  • analyze it like a typical rectangular beam but reduce the effective width by the pipe diameter and assume 2 No. 8 top and bottom, or maybe 2 1/2 #8's.


  • #3 ties at 12 seems light. Use 3" cover minimum all around; check the aggregate size of the mix to ensure you leave enough clear distance between the bars and the pipe.



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