you quoted Noseall out of context.....Ive just beaten you at your own game and now you are upset.
err I didnt advise anything, did I?
Mm.... that relates to width of strip footings not depth.
I suggest instead of getting angry you might like to read documents more carefully.
Ok, so did it sink because the concrete foundation was not of sufficient section, or because the foundation was sitting on either unstable ground or ground with low bearing capacity?
It is the stability and load bearing capacity of the ground which largely determines the foundation design, not the size of the strip foundation.
Anyway this is off topic, back to statues....