It is called the Treated Wood Foundations here in CA. In the US this may be the way builders build, but in Canada, We use wood foundation because their better. They will not leak and cost less. In the US you may build them form a lumber yard or a panel supplier drawings. but here we install them only with a good plan. This is a DESIGN. Some day you will all see the light.
GET IT DESIGN..........That is the only way.