Pole footing
Pole footing
(OP)
It's been awhile since I have designed cylindrical footings, such as those formed from sono tubes and filled with RC. I have a 12' light pole and am coming up with a 16"diax36"d footing sized for overturning. This seems a tad large too me....any comments?






RE: Pole footing
The 16" may be required to allow cover over the anchor bolts and the depth is what we see as a minimum to get below frost depth.
RE: Pole footing
RE: Pole footing
Mike McCann
McCann Engineering
RE: Pole footing
RE: Pole footing
1. Wind load/speed
2. Estimated Projected Area (EPA) and its location
3. Soil type and strength
4. Is the pole footing restrained at surface?
I use a rule of thumb for initial estimation, “footing depth is estimated to be about 1/3 the height above ground”, for this type of foundation
I also would suggest that the pile footing be few inches above grade to reduce effects of corrosion to the pole base.
Good luck
Regards,
Lutfi
RE: Pole footing
2. 10.0 at pole top, 8.6 18" above
3. sand, using 110 pcf and 40deg
4. more than likely yes, but we are analyzing with no restraint.
This is an al light pole....