Footing of corner column at property line
Footing of corner column at property line
(OP)
My corner column sits at property line, in both X and Y directions. The interior column in Y dir is far way and its load is negligible. So I cannot use it to do combine or strap footing with my corner column. The adjacent column in X dir is also along property line and its own footing is strap with its own Y dir interior column footing. So basically my corner column cannot tie into footings in X and Y dir.
Therefore I designed a spread square footing with my corner column sits at the corner of the footing by including eccentricity in both direction. That ends up a 12'x12' size for column loads at 50 kips and soil net bearing at 2500 psf. The column has beams in both direction to tie into adjacent columns. I wonder if that works. Please let me know.
I also wonder if "L" shape footing work with my corner column. But I don't know how to calc "L" footing. Please let me know.
Thanks a lot!
Therefore I designed a spread square footing with my corner column sits at the corner of the footing by including eccentricity in both direction. That ends up a 12'x12' size for column loads at 50 kips and soil net bearing at 2500 psf. The column has beams in both direction to tie into adjacent columns. I wonder if that works. Please let me know.
I also wonder if "L" shape footing work with my corner column. But I don't know how to calc "L" footing. Please let me know.
Thanks a lot!





RE: Footing of corner column at property line
The grade beam would then extend into the building and have a buried, heavy pad as counterweight.
This is an option - it may be more expensive (more formwork, rebar, etc) than just a large corner pad though.
RE: Footing of corner column at property line
How did you get an eccentrically loaded footing to work, with the column on the corner?
DaveAtkins
RE: Footing of corner column at property line
I put a large eccentricity, say 70", in both directions. That is why it needs 12'x12' size footing. The footing absolutely has partial bearing. As for overturning, I used footing weight , soil weight and slab-on-grade weight over footing to counteract. If you think this is not correct, please let me know. I want to know why.
For now I will use JAE's suggestion for a safer design. I actually used this method for footings of edge columns at property line along X dir.
Thank you two very much!
RE: Footing of corner column at property line
DaveAtkins
RE: Footing of corner column at property line
Never, but never question engineer's judgement
RE: Footing of corner column at property line
RE: Footing of corner column at property line