eccentric load on column footing

huangyhg

eccentric load on column footing
i have a pre-engineered metal building with rigid frames.  the manufacturer's engineer has stated that they always place the edge of the column footing flush with the edge of the building's turned-down slab.  since the column is within 8 inches of the edge, this means the column load is eccentric to the centerline of the footing.
does anyone have a reference or formula(s) that you can share that handles this situation?  also, since this pour will monolithic, do you account for the grade beam action between column footings?
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see foundation engineering by braja das.  he covers eccentrically loaded footings fairly well.  coduto has another good reference.  
i don't normally account for the thickened edge helping with the column gravity load.
what about the grade beam action (turned-down slab) helping with a moment on a single moment column?