2x4s for the frame - minimum size - you could go larger width boards
1x8s for the face - this is the minimum a electrical light box will fit
Screws depending on how you will join boards and attach to ceiling:
Cut to fit
Please read through the entire plan and all comments before beginning this project. It is also advisable to review the Getting Started Section. Take all necessary precautions to build safely and smartly. Work on a clean level surface, free of imperfections or debris. Always use straight boards. Check for square after each step. Always predrill holes before attaching with screws. Use glue with finish nails for a stronger hold. Wipe excess glue off bare wood for stained projects, as dried glue will not take stain. Be safe, have fun, and ask for help if you need it. Good luck!
We have a cathedral ceiling, but these beams can be attached to any ceiling as long as you are able to screw into studs in the ceiling or properly anchor.
This plan also works just for adding faux beams to your ceiling. But if you plan on adding lights, figure out where your lights are placed and avoid putting a 2x4 support in that space. You'll be tight on room.
We used a pocket hole jig, but you can use screws and glue as well.
Then it's just a matter of attaching the frame to your ceiling, and adding the top board. We installed as much lighting as possible on the ground to minimize ladder work.
Consult with an electrician about wiring and lighting code requirements in your area before taking on this project.
DIY fake beams with recessed lighting! Step by step tutorial with photos and diagrams.