The yurt we've been living in since Autumn last year needed to make a jump to the left (or a step to the right). Here's how you can do it at home.
Put some concrete blocks in place, make sure they're level, and paint some blackjack on them to stop moisture rising. Like this:
After the heavy rain, stand on the blocks until they stop sinking, pack out and arrange your joists, thusly:
Nail your boards across the joists and treat with oil, this-wise:
Screw your marine ply around the platform, hereuntoafter:
And stick your yurt on it, like so:
(This last move can take longer than anticipated, as with all the previous moves.)