best way to do this...Pics
I need to frame this 12' section up against the XPS shown. Rafters are running parallel to the wall making it more of a challenge. (Picture 1)
Picture 2 shows a sample of one way I thought of. It essentially screws the front end of a 2 X 12 X 12 to the closest joist and allows the back end to rest on the concrete sill. Pluses here as I see it are it creates a firestop. Negatives...that 2 X 12 X 12 likely costs way more than the a couple of 2 X 4s used in method 2. Once up, that section is complately blocked off and inaccessible...not sure if that is a concern.
Method 2 (picture 3) involves screwing up (perpendicular)some 2 X 4 X 2s to the two closest joists and screwing to top plate of the wall to that. I am unsure how far apart these should be...2 feet? Pluses here, easier, cheaper, can access the area. Negatives...firestop needs to somehow be added.
So, is there a consensus on which way is 1) up to code, 2)sturdiest, 3) easiest, etc etc. or, is there a 3rd way?