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I see that it says the tables make the assumption of a 10 psf LL and 7 psf DL. I don't agree, necessarily, that 10 psf is the correct live load
The IBC sets a roof live load of 20 psf. Your local code can make it MORE stringent, not LESS stringent.
You can plan for a doug-fir no. 2 pressure treated 4x12
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