There really isn't any great reference that I know about. I think ATC published a pretty good manual regarding residential structures. IBC chapter 18(1805.2 & 1805.4.1) give general guidance. Minimum ftg widths are 12"(therefore 1500 plf(min) per Table 1804.2). Also, Soils report would identify min width & depth. Size for point loads(P/allow brg)accordingly.
check with building officials in you area. In my city the have standard handouts for residential buildings. As long you follow them you dont need structural engineer to do design.
If you area a structural engineer try you senior engineer. because if there is one thing you need to know about residential footings, is that there is many different local customs.
Arguing with an engineer is like wrestling with a pig in mud. After a while you realize that they like it
If it is a normal residential footing, you can be wasting time and money trying to engineer something that is as simple as a residential strip footing that may not require reinforcement.
If you have higher walls (over 9') or a lack of lateral support at the top of the wall, then that justifies engineering. High lateral loads due to the decision to not install proper drainage can also require engineering. If the soil is questionable, that will also require engineering.
In the big picture, a rigid wall (block or concrete) has enough strength to distribute the loads and create a structural member far more rigid than the footing in the vertical direction.
The only footing design usually essential when you have a cantilever situation since vertical strength is rarely a problem unless too many simplifying assumptions are made.
ACI puts out a small reference, 318, specifically referencing this and residential concrete walls. It also references other ACI codes but you'll get through it. It's short, about 30 pages if I remember.
Good point above, local code folks sometimes have minimum requirements so you don't need to chase this. Also, they sometimes allow "local practices" to be used.
Our firm has not ever designed any residential footings. However my father just built a new house and I helped with some of the construction documents and structural details. I called out for the ACI minimum reinforcing for temperature and shrinkage. I called out for a 22" wide by 12" thick footing with 2 # 5 bars longituninally. Then I gave the contractor the option of #4's at 12" or # 5's at 18" centered in the wall. The wall bars had a 90 degree bend at the bottom and were cast into the footing alternating directions. This is more than most contractors ever put in a basement wall. For my fathers house, I believe this is plenty adequate.
