Good response.
Okay, wow, yeah, the guy that is farthest away should be able to see the best location to choke a large peice. So, his fault as he said.
Spider legs can be very simple. Just three individual ropes, made from something that preferrably does not stretch, like dyneema, or also named as amsteel by samson.
Tenex is okay too.
Amsteel II is the real way to go though, as amsteel blue is a loose weave that catches on everything. Amsteel II looks like a bull rope, it has a rope jacket over the amsteel. SOOOoooo much better. I didn't know about amsteel II when i bought plenty of amsteel blue.
Probably want something with breaking strength of 36,000 lbs each I would think.
Just have the crane operator place the ball in about what you think the center of gravity of the limb, such as you would for a single sling.
then spread the 3 slings outward to three different points, try to pick two upright points and the butt.
have crane op tighten, you watch carefully as he tightens to see that each leg tightened about the same, if they didn't and you don't want any movement, loosen the crane op up, motion or tell him to move the boom a litte in the better direction, then have him winch up again and see that they all tightened at the same time.
if one leg was observed as not tightening as fast, you know it will roll that way first as you finish the cut, sometimes you want it to move for reasons.
sometimes you want the tips to drop for different reasons, so you might have the butt tighten first, then the crane op will winch down as you cut until the two tip tied ones tighten.
they make for very smooth picks.
I think 30 to 35 foot is the best length for most crane work.
here is quick diagram of three spider legs. they go on the hook and stay there of course, then you just running bowline tie them to the limbs to what length you need.
(did not have time to spell check or read over my wording, gotta go).
