Nail support frames into the wall with no studs ?

I can help Scott

You could secure the units you built to the studs in the back wall, screws would work well. Then build boxes for the remaining areas and anchor them the same way as the main unit where you can into the studs.

You could trim it up when done with molding. Great job!

Thanks all! The bookshelves are actually IKEA. I need something for the top molding to be nailed into. That’s why I was wondering how I would do it if I can’t find studs/joists for the ceiling support frames. See pic below for where I need support for the molding.

You could attach a support 2X4 horizontally - screw it into the studs - and then attach your bookcases to that.

I would secure them to the studs in the back wall. That's what we did in my closet with similar shelves. We used the "L" type brackets and attached where ever we had studs.

here is more info for you

https://www.youtube.com/watch?v=2SSJaO3gVPE

The photo you provided seems to be cut off. I assume you want to attach 2X4's to the ceiling flush with the front of the cabinets but no joists to attach to. You can use toggle bolts. The wing part goes into the ceiling and they open up. When you tighten the bolt the wings would hold the 2X4 to the ceiling. They come in different lengths and thicknesses.

Your welcome. Glad to help. Anymore assistance needed just ask.

Faddu,

You probably have furring strips running perpendicular to the ceiling joists every 16 inches on center. If you measure from where the wall meets the ceiling (left side of your picture) up towards the peak of the ceiling, you should be able to find them. You can attach your 2x4's to the furring strips. You may have to use a combination of screws going into the furring and the toggle bolts William suggested. You also don't necessarily need 2x4's. If you just need a nailer for the trim to attach to, a 1x4, which looks like you are already using up at the top left in the back, would be sufficient.

Could you screw them right to the wall because then you use plugs you put those in the hole first then screw into them. And they hold into Sheetrock well.

Faddu, how nice that you responded to the two suggestions that really helped you solve the issue. They often help with advice and I'm sure really enjoy being thanked for their advice. I hope you get the bookcases installed and am sure they will add much value to your home.

If you build a frame then put cabinet in it then you could screw to that

you will for sure like to install board across that is attached to 2x4 on the back so you can screw your bookshelf

You might have better luck attaching 2x's to the tops of the shelf units themselves, building up the tops, and attaching the trim you want to that. You will need to secure the shelving units to the walls behind.

You could use "NO MORE NAILS" to fix them!