rob704
Why would you have different reinforcement in each direction in a square 2 way flexural footing? It should be reinforced like a 2way slab! And as it is symmetrical, so should the reinforceemnt be.
Or am I mis-understanding where you are putting the shrinkage reinforcement.
You have not said what the exposure is. If the soil contains anything corrosive, then yes, I would be checking for crack control. In fact, I would probably do it anyway as it could possible be permanently wet.
houseguy,
It is a flexural footing. They crack because they are flexural reinforced concrete and bending and shear stresses are induced in them from the pressure from the soil.