I realized just a bit ago that the pics were mounting up and the progress was being made but I've been slipping a bit in the documentation department... so here's an update.
The back wall has been roughed in and the ceiling worked out. The design allows for the rollup door to remain intact, retracting up into a tightly margined gap. It also provides a space for the propane locker and some inherent storage space above it.
The transition (visible in the pic below with the fan) was the trickiest part to figure out, but once I set it up, the rest just kind of fell into place.
We got a little ahead of ourselves (that's been par for the course for me throughout this entire endeavor)... the sheathing needed to go up on the sides before the framework that supports the back wall, and now, again as typical, it will be difficult to rework. I may bypass the rework altogether and go with a little idea I've got... it'll depend on what timing does.
The back wall with the OSB in place. The placement of the foam is only temporary.
Since this wasn't even remotely a standard sized anything, the door had to be fabricated from scratch as well. It's frame is 2" thick to allow 100% foam fill, but also has the same OSB as the wall for a little extra toughness. It will mean some tweaking for the lock, but should work fine. The inside will be covered with the same paneling that the ceiling has.
Here is the cross flow fan hanging from the transition support beam (not visible). It's there for evaluation as a replacement idea for the traditional style fan. It uses very little power, and while it moves a fair amount of air, it's all in a "beam", and so diffusion vanes will need to be designed for it.
The tape above the left side of the fan is a patch until that piece can be replaced. I broke it after cutting it by slapping it to get the stragglers off
Behind all this you can see my makeshift door that's keeping things comfortable until the real door is finished.
That's about all for now... I'm just trying to squeeze 4x what a truck this size is designed to hold down into a volume occupying approximately 1/8 of it's total available space. Not fun...
... Nearly everything in that pic is slated to play a role, and there's plenty more where that came from
Till next time...
Steve