This one is 4'x5', and it is 8' to the platform. I framed the box in my garage, and assembled it in the woods. The platform and base was all assembled in the woods (hint, glue down your floor as well as use screws). Notice that the 4x4's go into a product called "elevators." They can be bought online (Gander Mountain, Cabelas, etc.), and make the platform building easy. Since they flare out, you do not need to bury the 4x4's. I did pound a 4' t-post into the ground at each corner, and screwed the t-post to the adjacent leg. I have a 3" piece of PVC going from inside the box to 15" underground for my urinal and drainfield. My windows are 12 inches high, framed all the way around with 2x2's. It makes for a very solid shooting platform.
