OT Deck Footing Location Mis-measurement Causes Off-Center Placement – GreenBuildingAdvisor

For small 8×8 back deck replacement—which never had footings before—now designed according to code. (3) 15″W footings were poured. For at least the first one, Instead of the center being 92.5″ it is 95″, 2.5″ too long. So if we keep the deck dimensions the same as the plan and leave the footing as is, the 4″ wide Pressure Treated Vertical Support would now run from 90.5″ to 94.5″, a little off-center. The plan is for the footing to be covered by bluestone

The question is how crucial is the load not being perfectly centered? The new deck is about two feet longer (8’x8′) than the old one which had no footing ever, only 4×4 PT wood. This is the carpenter’s mistake, but rather than demolish and re-pour the entire footing, perhaps just enlarging the deck 2.5″ is the solution? Or just ignore the issue since load is much smaller than the footing capacity? 

But I also can’t yet verify the accuracy of the location of the two other footings or the pad at the bottom of the stairs. (Note the drawing shows a 3.5″ difference between the full deck length (8ft) and the proper center of the footing but since the center is actually now 95″, the difference is 2.5″ not 3.5″. The footing in question is the solitary on the right side of drawing.) I discovered this fairly recently by just deciding to measure myself, and now this monkey wrench into the job at the worst time. Some codes read that center placement on footings is imperative; I can’t find a justifiable reason why the footing wasn’t placed correctly in the first place.