Originally Posted by
John Lampert
This area will eventually be finished for living space.
John,
From everything else you posted in your post, I would hope you investigated this too, but ...
"This area will eventually be finished for living space." means the ceiling joists will then become floor joists, which are required to have a higher per square foot load capacity that 'just ceiling joists used for supporting gypsum board'.
I will assume that you have already addressed that, and, if you are planning on installing gypsum board on the rafters, that you have looked into their load capacity rating as well.
Welcome to THE inspectors board.