I just learnt about how a good foundation should look like. You know I used to think it's whatever depth the diggers choose to dig that it's Okey for building. You're indeed a genius in your field, your didn't master only your profession but as well master the right attitude to life..
I appreciate so much sir @ovey10, yes pertaining foundation the depth matters alot especially when it is nit bungalow (I mean any building that has another building on it). A proper supervision needs to be done to ensure the load bearing capacity of the building is transferring the loads to a stronger strata beneath the ground an not the top soil (the one we do call cultivated soul). Thanks for reading and grasping some knowledge.