when can typical footings be on undisturbed subgrade as opposed to compacted subgrade?
when can typical footings be on undisturbed subgrade as opposed to compacted subgrade?
(OP)
without geotech, i'm seeing a go by drawing with both undisturbed subgrade and 6" compacted subgrade.. when is it ok to use undistrubed?






RE: when can typical footings be on undisturbed subgrade as opposed to compacted subgrade?
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: when can typical footings be on undisturbed subgrade as opposed to compacted subgrade?
BA
RE: when can typical footings be on undisturbed subgrade as opposed to compacted subgrade?
RE: when can typical footings be on undisturbed subgrade as opposed to compacted subgrade?
is this a bridge, dam or garden shed?
RE: when can typical footings be on undisturbed subgrade as opposed to compacted subgrade?
In the jurisdictions where I've practiced, it's usually this for shallow foundations:
1) Found on undisturbed bearing strata.
2) Geotechnical to confirm bearing capacity on site.
3) Mud sill at GC's option but, if you omit it and something goes wrong, you're screwed.
I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.
RE: when can typical footings be on undisturbed subgrade as opposed to compacted subgrade?
As others have pointed out, it depends on the type of structure, loads, allowable settlement, and the soil.
Mike Lambert