In my basement, there's currently a tile ceiling that's installed on furring strips attached to the joists. The furring strips are 1"x2", attached to the joists by nails. We're currently replacing the wood paneling with drywall, and would like to replace the ceiling tiles as well. Would these 1x2" furring strips be strong enough to support drywall hung from the ceiling? Generally, I've seen references to using 1x3" furring strips, so I wanted to see about the weight issue.
Weight isn't going to be your issue here. 2 inch furring strips may be pretty hard to hit with the drywall screws. The screws need to be in good solid wood and not going through an edge etc. If You are careful, caulk some good lines, the 1X2's might work for ya. The other consideration is if the spacing is good and you have enough surface to butt pieces of drywall together and still have wood to screw into. I'd probably plan on adding some extra 1X3's to the mix to be sure you have good wood to catch a screw.