In my basement...which suffered major water damage when a sump pump gave out during a heavy rainstorm (water seeped in through a crack in a block. The ground could not keep up with the water)
...is a drop ceiling. The tiles suffered damage with warping from the humidity, so they all had to come down. I have loads of channeling in the crawl space, and I looked at that and wondered.
It worked! I screwed this channeling onto both sides of the 2x4 where the ceiling was dropping the most, removed the support lift board and nothing dropped!
Now I will cut and fit for the rest of the 2x4's, and probably do some 2x2's the same just for that added support in some areas, like around the a/c unit.
For a small RV like this, I think it's going to hold up well. I dunno if it will work for the larger RV's.
Now ya'll don't be afraid to burst my bubble if you think this won't work or will create any kind of problem. So far, I can't think of any reason it won't work and last awhile.
During the winter months I plan to put some 2x4's across the top with a tarp over them. Have them spaced enough that the full weight of the snowfall isn't resting completely on the roof.
Back out to cut some more channeling and get back to work before it gets really hot out there.