The home for our pair of new 20-pound propane tanks. Mounting brackets are on the way. Had to relocate the middle step outboard a few inches, which ironically makes the driver and passenger side steps symmetrical now...
The framing for the rear drawbridge.
The 4x8" beam is to attach the other half of the hinge to. It also should make the lower rear corner a little tougher, since it's reinforced with two 4x8" beams.
The tie-down is to assist in making sure that everything we build is as square as we can make it.
Here is the framing for the roof and one side wall, laying in the yard while we used the floor surface to build the other side wall. The double 4x4s at the back of the side walls, is to anchor the winches for the drawbridge.
Here is the completed floor. Note the drain plumbing exiting the bottom of the overhang at the front.
Once the floor was done, we were able to use it as a working surface to build the ceiling, walls, and drawbridge.
Here is the floor, with the 4x8 beam across the back for mounting our full-width drawbridge hinge. In this pic we have started installing the 3.5" thick polyiso rigid foam board insulation with an R-value of 24.
Here is the floor, flipped right side up.
The additional reinforcements in the floor for our Japanese Ofuro soaking tub is visible in the left front corner, as well as the 1.5" drain plumbing for our kitchen and bathroom.
In the right front corner, is the floor reinforcement for our...
Yesterday we framed the last wall. We have all the walls, the roof, and the drawbridge all stacked laying down on the floor under a heavy duty tarp until today's rain passes.
We hope to be able to erect it this weekend.
As far as your project goes, you sound like a smart guy, and you've gotten some good input from Len.Baron too.
The 9.5 is,as has already been pointed out, kind of an "orphan" axle, but it does meet your needs.
Like Len.Baron, I am not a big fan of the gov-lock. I'd trade your G80 axle for an...