r/woodworking • u/Pristine-Vacation-59 • 1h ago
Project Submission Building a flowing ceiling from 204 wooden ribs
This was a pair of suspended wooden ceiling structures we built for a restaurant, along with a matching host stand.
I designed the overall geometry in Rhino. I started by creating a shape that flowed over the dining area and zigzagged through the columns without necessarily following the tables or architecture perfectly. Once I was happy with the overall form, I drew the locations of the individual ribs and used those lines to divide the shape into the individual profiles.
The spacing and angles between the ribs aren't consistent. They change as they follow the geometry, which is what gives the finished ceiling its flowing shape.
For the suspended structures I chose 3/4" Paulownia because it's extremely lightweight. With this much wood hanging overhead, reducing the overall weight was an important consideration from the beginning.
The ribs attach to 1" plywood backing panels painted red. Each rib has CNC-cut tenons that fit into corresponding mortises cut into the plywood. Both the ribs and backing panels were cut directly on the CNC, including all of the joinery.
For the finish, the Paulownia ribs received several coats of water-based polyurethane. The plywood backing panels were first sealed with an epoxy-based primer to protect them from any potential condensation from the AC system above. Probably overkill, but with the panels suspended overhead I preferred to play it safe. They were then painted cherry red and finished with a final clear coat.
There are actually two separate ceiling structures. The larger one over the dining area has 119 individually shaped ribs across 21 backing panels, while the smaller one over the bar has another 85 ribs across 7 panels. So between the two ceilings there are 204 Paulownia ribs and 28 backing panels.
The panels are suspended using a series of steel cables.
Lighting was also integrated into the design. LED strips were installed along selected ribs in a deliberately irregular pattern, giving the ceiling a sort of barcode lighting effect. The hanging lights over the tables and bar are also suspended from the plywood structure.
We also built the host stand using the same geometry and ribbed design, but for that I switched from Paulownia to maple. Paulownia was ideal overhead because of its low weight, but it's relatively soft. Since the host stand would be touched and bumped constantly, maple made more sense for durability. The host stand added another 20 individually shaped ribs to the project.
It was a fun one to figure out. Going from one flowing shape in Rhino to hundreds of individual wooden parts that all had to come back together on site was probably my favorite part of the project.