Before the rock and concrete were poured, first the footings were framed. In some places with wood planks, and in others a form of plastic.
The plastic forms were constructed in such a way as to act as drain tile.
Rock was poured around the edges of the forms first, and then the concrete was poured into the forms. The concrete set very quickly. I was told this concrete is rated at 5,000 lbs.
Surprised, as that seemed very heavy to me (remember, I know nothing about such things) I double checked I heard correctly. Yes, the concrete weighs 5,000 lbs per cubic yard!
Mark really doesn't like to talk about himself, the house is much more interesting.