"floating" redirect

This is what I was thinking. Set your climbing line anchor to the right of your PSP tree or as depicted if the tree is strong enough to handle the lateral force. Send that redirect line from the left over the tree of challenge and securely connect it to the climbing line. Now adjust the anchors so the climbing line drops down thru your challenge tree, pull appropriate tension and access the tree on your climbing line. I don't know what the plan work is on the tree so removal or dead wooding would be a little different. Again, the point is to use compression when possible when there is a weakness.
Lots of good ways to safely get the job done.
I set a line between two adjacent trees for an escape route on this lightning stuck removal.
 
CutHighnLetFly said:
I guess what I'm asking is whether or not this is possible in any form. Imagine the tree to be climbed is inaccessible and climber deems it not suitable to work from.
Red line is climbing line, red dotted line shows how to improve the anchor point to a certain degree, orange line would be the redirect in a sense, anchor point 20' or lower.
Like I said, I'm not asking cause Im gunna try it, just wanna know if people think it's possible in any way.
Click to expand...
You may be better creating a line around the outside of the tree, hitting as many sturdy points as possible, run the line along the trunk, use the tree like a map. You could even use 2 lines that converge at the tree top to form your re-direct.
I don't see how else you could manage the slack.
I have never had to rig an idea like this.
Those lines could be supported with additional lines to the adjacent ground anchor.
 
Clearly you want two high points to create a floating anchor to access a tree that you don't want to anchor in. As mentioned there's too much sag in the line to make it practical if you anchor one side on the ground. This is a modified approach where you use something (a smaller tree in this case) to raise the low side of the system. The rope is excessively redirected in the high tree to emphasize what SRT climbers already know, loads on either side can be mitigated with smart anchor choices and redirects.

26748057674_480dec526f_b.jpg
 
I have not seen a bad idea yet.
I keep thinking of all the zipline/speed lines I have set up for climbers. I'm still thinking of solid anchors at each end of the line that you can get a reasonable tension applied to the line. I use a Hitch Hiker as it goes well both vertical and horizontal without changing configurations. Often times we pass over smaller trees and stuff in the woods just as you mention here. Normally we just walk over this kind of tree and continue on the speedline to the ground. Kind of fun to stand on the tipsy top of something you could never climb.
Here is an option: Rather then a direct harness connection to the HH (or tool of choice) attach a DdRT system to the HitchHiker. Rather than just stepping over that problem tree like we would on the zipline, you can now descend DdRT doing whatever work you planned on. If it was not a removal everything is easy to retrieve as both anchors can be released. Again, try to use the compression strength of limbs and load them in the direction of the grain of the wood.
 
I dig the discussion, like the thoughts getting thrown around. Suspending between two high points is easy and common enough. Double crotchin'.
I haven't run into too many scenarios where hanging out of two trees was an option though, or I wasn't seeing it. Most videos I've seen were people hanging from huge conifers into something else. Tall trees giving good rope access into a smaller tree.
Moss' art work is a scenario I imagine running into.
Been fun reading all the input, hope discussion continues, even if it veers away from the original specifics
 
moss said:
Clearly you want two high points to create a floating anchor to access a tree that you don't want to anchor in. As mentioned there's too much sag in the line to make it practical if you anchor one side on the ground. This is a modified approach where you use something (a smaller tree in this case) to raise the low side of the system. The rope is excessively redirected in the high tree to emphasize what SRT climbers already know, loads on either side can be mitigated with smart anchor choices and redirects.

26748057674_480dec526f_b.jpg
Click to expand...
AJ, I really like what you did there, and it would be ideal if that was the only structure available. I also think if the anchor in the larger tree was relocated to another far-off point to the right, it could improve the compression.

Truth is, what you drew really reminds me of a rigging set up I did that made it into the Span-Rigging video...buried in Buzzflix Video somewhere. The trick is to choose the redirects and anchor points wisely, when the tension of the Highline brings the rope into that critical angle realm (120 degrees). The more you can mimic the construction of a Cable Suspension Bridge, the better.

Really good stuff though. What I really love is how the correlation of numbers works when you look at angle of deflection and percentage of your weight when you're rigging a climbing system. It makes for easy math so the calculator can stay at home...

0 deg. = 0%
45 deg. = 50%
90 deg. = 100%
145 deg. = 150%
180 deg. = 200%

...in all cases, the percentage of load is only a few digits away from the degree of deflection. Couldn't be easier to remember, or to understand how you're loading a redirect.

The Highline being fixed at both ends does change the scenario, though, because while compression is still in play, there could potentially be a high amount of leverage on the tree. If the line were anchored low and off to the right, the compression would stay but the leverage would not, and perhaps more tension could be put on the Highline to reduce sag.

Thanks for taking the time to sketch that out. It's a great example! Is that climber wearing a West-Coast style full brim hard hat???
 
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