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Home > Forums > Structural Engineers > Activities > Structural engineering other technical topics Forum

Pile Cap Depth

thread507-200961
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Anne651 (Structural) (OP)
25 Oct 07 23:15
Does pile caps have to be below frost depth?
So if I have grade beams, then its minimum thickness
would be 4feet?  Lets say I designed a grade beam to be
500mm thick,  do I have to make it 1.2m?
hokie66 (Structural)
26 Oct 07 0:23
Frost depth would control the level of the bottom of your grade beam, but not the depth.
msquared48 (Structural)
26 Oct 07 4:38
Adding to hokie66, you can always construct a concrete stem wall above a grade beam, and the wood framing over that.

Mike McCann
McCann Engineering
lkjh345 (Structural)
26 Oct 07 7:52
IMHO: I would check with your contractor (if known). Depending on the situation, and location of the project, many would prefer to cast the grade beam/pile caps the full thickness (in your case 1.2m) rather than cast a 500mm thick grade beam and come back and build a 700mm tall stem wall on top. It takes a lot of extra concrete but save forming labor.  
civilperson (Structural)
26 Oct 07 11:49
A heated building with external vertical perimeter insulation does not have to have pile cap base below frost depth.
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