How to make a wooden arc ceiling?

First use the joinery board to make a shape (as a keel) according to the arc, and then fix the gypsum board on the joinery board. You can't use light steel keel for this shape.

In fact, it is how to make an arc ceiling. The general principle is to use the keel for modeling and then stick the panel.

Plane curve: the auxiliary keel is curved, with corresponding main keel and suspender;

Facade curve: The designed curve is cut with multi-layer boards, fixed with corresponding keels, and covered with flexible plywood, metal plates, gypsum boards and other surface boards.

I hope I can help you.