I came across an interesting joint set up for a tripod on a DIY tripod stool website. I was thinking it would work well here instead of lashing, which could slip on slippery poles.
Basically its bolting two poles together with an Eyebolt sandwiched in between which then is bolted to the third pole. The poles are free to swivel outward
My question is: What size bolt would one recommend to handle the shear forces downward?
Also suggestions for how to attach the crossbeam suspension?