82 views and no reply. Don't worry, my skins pretty thick, like my head, if ya wanna say someting critical I welcome a chance to view another opinion and maybe adjust my thinking or construction. Or at least explain the idea behind what's done already.
Here's some pics of how I cut out the trusses for a second floor. With 12' eaves from finished 1st flr. I set the top of finished 2nd flr @ 8' and then needed 3' more to use the above. Trusses are std 4/12 pitch.
For descriptive purpose, I'll call trusses N.-S. I've supported every other truss with 4x4 post E.-W. and used 4x4 base to spread the load on the concrete below. That's @ 10'-6" S. of N. wall. So there's ample storage in that 4' high erea below the trusses @N. to eave. Built that into a wall, w/2-2x8's to carry truss bottom chord to N. @ cutout. The trusses have been added to, full distance of top chord w/ 2x10's to eave @ N. w/2x8 under top chord to complete the bracing. The idea behind that was to keep the perimeter wall load bearing and not move the load into the cutout tho all precautions have been taken for the interior walls to bear this load. Additional matl added to strengthen where the 2x10 ceiling branches off top chord in both sandwich and gussets. A load bearing wall of similar construction was put 4' S. of the peak to divide the rooms of second floor. The S. room(12x16 in main shop) is phase two, and will require a new roof above which will lead to a SW "L shape" to the shop and have W. 15' eave. I'm posting the pics N--S, hopefully they'll show up that way & aren't too big.