Jim, AYC gets pretty high ratings for durability, but I'm sure you already know that NO SAPWOOD has any decay resistance.
Aside from that, there are only a couple of things that show up on my radar. First, is on the back side where the Nylock nut and washers are countersunk, will only leave about 1/4" of wood under the washer on a board which is trying to spring away, especially on the ends.
The other thing, is that you can't bend a board all the way to the end. I seem to recall that eight times the thickness of the plys will remain straight. Adding to that, is the fact that the leg which would help hold the shape is 30" over from the end, so there is nothing out there to help counter the combined springback of all the 10 slats.
As much as I like the look of the long overhang, I'd be concerned about those forces. If I were planning to perform this project, I would get it in writing that if this problem arises, it is back on the designer, and not your problem. If it is ok with them for there to be some straightening on the ends outside the outer post, then there isn't a problem.
You might want to bend a single board to that radius, then multiply it x 10 to see what the force will be, might be a good idea. Plus you can see how far from the end stays straight.