The words ‘built on a firm foundation' have become part of the language and most people would unhesitatingly agree that a house has to have a foundation' without perhaps understanding exactly why. If one were to place an open wooden box upside down on a patch of soft soil and load with bricks it would not be long before the edges sank into the ground. On the other hand if the box were the right way up it would probably hardly sink at all.
Reference:
Donaldson, G. & Billingham, P. 1973. Introductory guide to foundations. (BG). http://hdl.handle.net/10204/4700 .
Donaldson, G., & Billingham, P. (1973). Introductory guide to foundations (BG). Retrieved from http://hdl.handle.net/10204/4700
Donaldson, GW, and PA Billingham Introductory guide to foundations. BG. 1973. http://hdl.handle.net/10204/4700
Donaldson G, Billingham P. Introductory guide to foundations. 1973 [cited yyyy month dd]. Available from: http://hdl.handle.net/10204/4700
