I usually do bush beans but this summers Im going with the pole beans and this trellis idea. I have a lot of cedar available and river cane so I think I'll run 5 upright cedars and across the top with some river cane then drop my strings and I ran a set of horizontal strings so it will a little more net like just for fun. I saw some comments regarding jute and my experience with it like tying up tomatoes is that it does rot very fast one season and its done for any tying and would compost very fast, it for sure didn't make it a second season.
I still need to cut my river cane the pieces I had cut were too short and my plant is to leave the trellis for 3 seasons compost the vine each season.
I only found this site last night and really am impressed with all the partnerships and its vast scope. Looking forward to spending some time here.