" distance between each "A" frame is about 48" --- sounds exactly like rafter ties (required every 48") and rafters. Your Building and Land Use Departments have it together! There is all the info you need: http://www.sandiego.gov/development-...etin/ib115.pdf
I suggest you get a permit for safety and if selling- no problems. Notice some of the particulars required, this on rafters for safety:
G. Roof Framing Plan
If you are modifying existing framing in the roof area (for example, to provide ceiling joists where the garage roof framing presently is comprised of rafter and rafter ties only), a roof framing plan must be provided. Include the following information:
1. When modifying rafters, please indicate hips, valleys and ridges for both new and existing construction. Dimensions of both new and existing roofs.
2. Rafter and ceiling joist size and spacing.
3. Any special framing at the roof area.
For information on sizing rafters and ceiling joists see Information Bulletin 133, “Roof and Floor Framing Span Tables.” Any proposed framing not meeting conventional construction standards may require submittal of plans and calculations by a registered design professional licensed in the State of California.
Also insulation required, p.t. ply and framing on a slab, new foundation under garage door opening, and BONUS--- no school tax if 500sq.ft. and under conversion. http://www.sandiego.gov/development-...etin/ib142.pdf
Be safe, Gary