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Increase in allowable soil pressure w/depth

Increase in allowable soil pressure w/depth

Increase in allowable soil pressure w/depth

(OP)
My state (Wa) just changed over from UBC '97 to IBC 2003.  There used to be a provision in UBC '97 for increasing the allowable soil pressure with depth.  That seems to have disappeared with the new IBC.  Is there anything in ACI that supports this.

RE: Increase in allowable soil pressure w/depth

metljakt - I assume this is allowable bearing pressure based on shear distress (which I would call the allowable bearing capacity) - the more embedment, the greater the allowable bearing pressure (capacity) in shear.  Warning, though - keep in mind that allowable bearing pressures (based on settlement constraints) may actually decrease if, by taking your footing deeper, you come closer to a soft compressible clayey/peaty layer.  Need always to look at the overall picture.

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