I'm in the process of finishing my basement, but I've run into a snag. I have all my waterlines and HVAC ducts secured directly to the floor joists above, right up against a concrete wall that I'm planning to cover with a 2x4 stud wall. The issue is, I can't nail the top plate of the stud wall to the ceiling joists since they're occupied. I'm also going to be enclosing the entire area with a soffit that will be about 30 inches wide and drop around 18 inches, but I'm concerned that it won't provide enough structural support to keep the wall steady. I'm not sure if I'm using the right search terms on Reddit or YouTube, but I really need some advice on how to tackle this. Any suggestions?
2 Answers
You might want to consider fastening a ledger (like a 2x4 placed vertically) to the wall, and then attaching your bottom plate to that. This setup should prevent flexing in the middle of your wall. If you're adding foam board against the concrete, you'll need to pack out the ledger to account for that. Also, if you are connecting the new wall to existing walls on either end, that will help with stability. A double top plate can make it even stiffer, especially if it's 16' long and centered!
One approach is to anchor the wall directly to the concrete with metal brackets and a ramset. There aren't strict requirements for framing basement walls since they aren't structural, so doing this could work well for you!

Thanks for the tip! I wasn't sure how to approach it, but this makes sense. I'll consider using the ledger method!