Hi Calvin;

This type of construction is known by many names and was briefly discussed in this forum under one of its more common names: piece sur piece. (search for "peice sur piece"). It is still in use in parts of Canada but I have no first hand experience even seeing historic examples. One question I have is how the shrinkage of the planks in accounted for since the posts will not shrink nearly as much.

I have put most of what I know into the Wikipedia article https://en.wikipedia.org/wiki/Post-and-plank

Good luck;
Jim