Got the last panel up for the back wall!
Notched the top ribs so the panel would fit underneath.
Cut the metal out using a set of really expensive (totally not broken rims) saw horses.
(Notice the burnt driveway. Plasma is no joke!)
Set into place and burned on!
Couldn't quite reach the top of the sheet with the 10' cable on my welder, and its waaay to heavy to lift onto the bus by myself, so I improvised a truly impressive rig.
After it was all welded up I trimmed the windows that met the back wall. The "flange" that bolts the window down was too wide with the new wall in place. Big flange:
After it was all together, I set the A/C unit in and tested it out. Even without insulation it cooled down quick in this 80* October day.
View from the inside:
Next I'll seal up windows and seam seal the back wall to hopefully make this tin can waterproof. Then paint the inside to stave off any rust. Then work on the frame some more...