Bearing Pressure Determination w/eccentric loads
Bearing Pressure Determination w/eccentric loads
(OP)
Hey all,
Sorry in advance if this is a simple question but my brain isn't working too well during this holiday week.
The situation I have is a PEMB column sitting on a pier which will be poured monolithically within a 14' tall frost wall with uneven fill. The interior of the wall will be filled to about 13.5' and tie into the 7" RC floor to resist OT. The outside of the wall will only be filled to 4' leaving 10' exposed. Due to the uneven fill heights and an 8k rack load on the interior slab, I feel as though I should check the footing for bearing type failure due to eccentric loads. I have attached a quick sketch to illustrate what I am looking at.
What is the best way to go about determining the bearing pressure applied to the soil to ensure that the bearing capacity is not exceeded?
Sorry in advance if this is a simple question but my brain isn't working too well during this holiday week.
The situation I have is a PEMB column sitting on a pier which will be poured monolithically within a 14' tall frost wall with uneven fill. The interior of the wall will be filled to about 13.5' and tie into the 7" RC floor to resist OT. The outside of the wall will only be filled to 4' leaving 10' exposed. Due to the uneven fill heights and an 8k rack load on the interior slab, I feel as though I should check the footing for bearing type failure due to eccentric loads. I have attached a quick sketch to illustrate what I am looking at.
What is the best way to go about determining the bearing pressure applied to the soil to ensure that the bearing capacity is not exceeded?






RE: Bearing Pressure Determination w/eccentric loads
If this is true, I would design the column just for the vertical load, and the wall to take the soil pressure and surcharge load.
Otherwise, please enlighten us further...
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Bearing Pressure Determination w/eccentric loads
So when I determine the size of spread footing, based upon bearing capacity, needed for the column just use the 56k vertical load and disregard the soil load?
RE: Bearing Pressure Determination w/eccentric loads
P/A + Mc/I
if that's the question, LOL, you'll hear a lot of senior guys here to get the help of a structural engineer.
RE: Bearing Pressure Determination w/eccentric loads
Read my motto...
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Bearing Pressure Determination w/eccentric loads
RE: Bearing Pressure Determination w/eccentric loads
Don't ever apologize in this forum for asking a structural engineering question. That's what we are here for.
We all have our moments...
Mike McCann
MMC Engineering
Motto: KISS
Motivation: Don't ask
RE: Bearing Pressure Determination w/eccentric loads
RE: Bearing Pressure Determination w/eccentric loads
Michael.
Timing has a lot to do with the outcome of a rain dance.
RE: Bearing Pressure Determination w/eccentric loads
I was thinking that eccentricity caused by the fill being 10' higher on the inside than the outside would cause bending in the footing and therefore an increase in bearing pressure on the inside of the footing.