I remember when I was about 15 years old and my parents (ok, my dad, my 2 uncles, and I) built a large deck. I mean, this thing is HUGE. Anyway, there is a section about 15 feet wide where the deck has a curved section that bows out similar to that stage design. That wood was a B17CH to get curved, and that was with the piece being wet for a couple of days and half as thick as the rest of the frame. Obviously, it was 2 pieces thick when done.

Anyway, these folks (and MANY others) are doing it with two thinner pieces of plywood. I've heard that some are doing two .5" thick pieces, and some people are doing a combo of two or three .25" thick pieces.

I plan to do that method. Obviously being thinner, the plywood wouldn't need (nor would you want it) to be wet.

Farewell - June 4, 2020