All of the lumber is pressure treated.
Most municipalities don’t allow PT lumber inside buildings, so you better check with you code enforcer before you use it.
I prefer to use plain old SPF 2x’s because they are kiln dried and resist twisting and warping much better that PT. You won’t need treated nails for PT wood which is twice the cost. I have a Bostitch framing gun (pneumatic) and dragging a hose around is not a big deal. My Dad was a carpenter (before nail guns,) he (and the trade) used 8 and 12 penny nails for framing. 8 (2-1/2”) for toe nailing and 12 penny (3-1/4”) for everything else. You can really get away with 10 penny (3”) for everything with a nail gun and just add a few more nails for the 12 penny applications.
There are plenty of Bostitch nailers in the pawn shops. Check it out, you won’t be sorry.
