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New experimental attachment method.

ThereWillBeSpuds

ThereWillBeSpuds

Well-Known Member
Joined
Nov 12, 2019
Messages
648
Before you go any further. This is an attachment method I have not tested rigorously at ALL.

IT MAY NOT BE SAFE

I intend to test it but wanted yall's thoughts first.

I wanted an easy attachment that has no clicking carabiners, no passing tag ends through loops, no unscrewing quick links, not knot tying at height, and no metal on metal contact. I intend to wrap the kong slyde with vet tape if this proves safe.

The rope I am using right now is just sterling accessory cord but I'd like to use a dynamic rope when I actually climb with it.
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You could pass the part with the knot through a couple times for extra security.
 
Sure does look like it’ll pull straight through that slot if weighted hard enough. That’s why you would typically use a carabiner which is rigid and cant be pulled through. Dangerous and I don’t see the benefits.
 
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Looks like it would catch with the stopper knot but I don’t know how many other problems that would cause pulling through.

Maybe it would be better to understand the purpose of this attachment method?
 
Application is two tether climbing.

I'm pretty sure the stopper knot on the tag end could not go through the slot. I intend to test that.

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I also played with a larger diameter "dogbone" (pictured is 11mm rope which will not pass through the slot even without knots tied in it.)

I can always go back to that idea if needed. But it was fairly clunky. I would definitely need to tie it to the tether so I couldn't drop it.
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I can't speak to the safety of said attachment method, but as someone who's played around using quick links to try and speed up branch passes on my own 2TC's, I find the addition of extra metal and weight to be a deal breaker compared to running an oversized eye to fish carabiners through. I'm not using a rappel line for my top tether either though, if it was forty feet of rope to fish through I'd probably run a quick link for that. This system does appear to be a little slicker than a quick link though for basic tether use. Curious to see how the testing goes.

Have you considered adding a piece of rubber hose between your stopper knot and the figure 8 to stiffen up that section of rope and prevent pull through?
 
krub6b said:
I can't speak to the safety of said attachment method, but as someone who's played around using quick links to try and speed up branch passes on my own 2TC's, I find the addition of extra metal and weight to be a deal breaker compared to running an oversized eye to fish carabiners through. I'm not using a rappel line for my top tether either though, if it was forty feet of rope to fish through I'd probably run a quick link for that. This system does appear to be a little slicker than a quick link though for basic tether use. Curious to see how the testing goes.

Have you considered adding a piece of rubber hose between your stopper knot and the figure 8 to stiffen up that section of rope and prevent pull through?
Click to expand...
Section of rubber hose is a good idea even if just for stiffness and wear indication. I'd want to make sure the hose wasn't a part of what made the system safe though. I need to test the pull through scenario without hose for sure.

I don't like the passing of the whole tether through a big loop because it means I am unattached to the tether for a moment which means I could drop it. It also means I'm either unclipping a carabiner (screw gate or autolocker both can be noisy) or untying and retying a knot (at height, in the dark.)

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I don't know I think its a slick idea! Especially for going around branches and the such.
 
ThereWillBeSpuds said:
I don't like the passing of the whole tether through a big loop because it means I am unattached to the tether for a moment which means I could drop it. It also means I'm either unclipping a carabiner (screw gate or autolocker both can be noisy) or untying and retying a knot (at height, in the dark.)

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Click to expand...

Staying attached to the tether would eliminate the part that freaks me out the most about 2TC, that is it turning into a 1TC. I'd still be hooking into and out of a carabiner when I attach to my foot loop tether for the actual passage of the limb, but it would eliminate 1 of 2 carabiners I currently operate.
 
The two stopper knots would provide the needed redundancy. How about grabbing more rope once set where the stopper is and looping it around once at hunting height for added no slip assurance?
 
woodsdog2 said:
The two stopper knots would provide the needed redundancy. How about grabbing more rope once set where the stopper is and looping it around once at hunting height for added no slip assurance?
Click to expand...
Like make the tag end longer and then tying a clove hitch or something around the working end after I got to height?

One could certainly do that but I'd like that to be unnecessary, only done for added piece of mind.

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The kong slyde is the part I am least happy with. I worry that I am loading the slot "out" in such a way that it make try to expand and end up snapping. Wanted to use a steel rigging ring but can't find one with a small enough inside diameter.

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Wasn't there some conversation about smaller rigging rings in one of the JRB threads?

I think it's a pretty cool idea!
 
ThereWillBeSpuds said:
The kong slyde is the part I am least happy with. I worry that I am loading the slot "out" in such a way that it make try to expand and end up snapping. Wanted to use a steel rigging ring but can't find one with a small enough inside diameter.

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Click to expand...
Would a 28mm aluminum ring be too large for this?
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SMC Radius Ring | REI Co-op

The SMC Radius Ring is designed to meet the needs of arborists and professional riggers. Because it can't accidentally open, it's ideal for remote anchor points where nothing can be left to chance.
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