Weedwhacker said:Good job on the trellis, Greg; thanks for sharing your project with us! 
(I personally think that one can never have too many places to grow climbing plants on...)
One concern may be that the PVC will break down fairly quickly from UV rays, unless it's a certain type -- "schedule" something or other, I believe it's gray in color. Or, painting the white kind will help protect it too, so you may want to reconsider doing the red paint 
I googled it. From what the first article says, it mostly discolors it, which by itself I'm not concerned about since the vine plants (we got another vine for the other side today) will cover most of it eventually (another reason I didn't paint it). Plus the fact that here in the PNW, we don't get a lot of sunlight over the course of the year. However, it does say "impact strength" is weakened, which would also mean tensile (bendable) strength. Googling "uv resistant pvc" comes up with other articles that also say it will get brittle over time.
http://www.jmeagle.com/pdfs/Te...
http://forum.earthbox.com/inde...
So for the next one, I'll be sure to paint it, or, switch to cattle panel, it's available at Home Depot. That was actually my first choice, but at the time I didn't know HD carried it, thought it was only at farm specialty stores.
