122lake

I wish to use alternating offset 2x6 studs spaced 12" apart (24" centers) in a 7 1/2" wall (2x8 plates). To create a continuous thermal bridge when the walls are spray foamed. Is there a way to automatically set this up or do I need to place each stud manually?

I plan on using 11 7/8 I-Joist for my roof rafters instead of dimensional lumber. How can I specify this in Home Designer Pro?