Coffered Ceiling in Dining Room

Very nice work with difficult angles for miters. How did you attach the beams to ceiling? Did you build crown insets in shop or install/cut each piece on ceiling?

I shot nailers/cleats on the drywall ceiling 'inside the beam' first. Then hung my sides from those cleats. I put cleats inside my beam sides to catch the beam bottom. All the crown was cut/installed on site. As I mentioned in the initial post, the ceiling/walls had serious plumb, level, flat, and square issues. That means there is quite a bit of fudging to make the layout appear perfect. So pre-assembling parts at a shop would be less practical.

Oh, forgot one thing that might be helpful to other people looking at a project like this. I built a jig to cut the very long miters for the acute angles in the triangle sections of the coffered ceiling. The jig hold the piece at a 45 degree angle from the fence and blade of a miter saw. This makes those loooong miters possible.