Eccentric Footing for Pilaster - Question

[efFeb]

Good Afternoon,
I've been struggling with some eccentric footings for pilasters along the property line. I had wanted to make these combined footings (this would mean more concrete, but they do line up well with the columns to the north)but was told by the project engineer to just design the footing for the centered axial force (P/A) and make sure the pilaster is designed to take out the moment due to the eccentricity. I can't quite wrap my head around why I don't still need to be worried about the column eccentricity on the footing - does anyone have any thoughts on whether this is an acceptable approach, or possibly a resource I might be able to look at to convince myself?
Thanks,

 

[dhengr]

EfFeb:
Cut a cross-section through the wall, pilaster and footing. Draw a free body diagram of this arrangement. The wall is likely eccentric w.r.t. its strip footing, and the pilaster is eccentric w.r.t. its enlarged footing. (P)(e) causes a moment on the footings. If you can reinforce the wall and the pilaster to provide a counteracting moment, you have a system which is in equilibrium. This requires rebar the full height of the wall or pilaster, for a varying moment, and that you be able to take a shear force out at the upper level diaphragm. Your idea of tie beams to interior col. ftgs., combined ftgs., or pilings are also possible solutions. That’s the price of bldg. right on the property line, and you didn’t dictate that.

 

[GC_Hopi]

You still should check the bearing capacity for the moment due to the eccentricity.