Well now that I'm back from vacation I guess I should post some more pictures of the ole project
I needed to have some heat and cooling in the shop so I picked up a 5 ton ser 13 ac and 120kbtu 93% eff gas furnace to install. The unit is not large enough to totally heat or cool the whole space but, it is large enough to temper the air in the space. To totally cool the space I would need between 8-10 tons of cooling, and to heat the whole space to say 65° about 250k btu. The plan was to only heat the living space to the target 65° or so and the rest of the space to say 40° or so ( keep it from freezing). For the cooling, drop the temp about 20° and cut the humidity way down.
The plan was to install the unit on the south gable wall about 17' up. I looked at a few "normal" mountings for HVAC stuff and didn't like them. I was looking through a catalog for a metal strut system and saw the mounting system what looked like what I wanted. The only problem was that they wanted almost $80 for each of the "arms" Too much so I got out the welder and made 3 of them. Cost about $20 for all 3. Next I had to put tougher the AC coil, air handler/furnace, and the HP media filter. I picked up the units as a scratch and dent furnace and the AC coil was a current years model and the furnace was last years, so the supplied mounting brackets didn't fit

So time to fab up some new ones. I also needed some return and supply air plenum's. So I had a place with a press break and shear cut up some 18 gauge galv sheet metal, and bend it into "L"s. Then I cut it out bent the curved sections and bent the tabs on it to make the plenum's.