If a picture speaks a thousand words, how much does a working model?
Allow me therefore to introduce my Subsidence Heave Indicator Tool or to give it its acronym S.H.I.T.
The purpose of this tool is to illustrate the cracking behaviour of masonry walls founded off of a clay subsoil
<<video of subsidence>>
Cracking due to subsidence tends to show itself in diagonal cracking propagating to a point or triangle
<<video of heave>>
Cracking due to heave tends to show itself in diagonal cracking propagating to ….