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Examples of dangerous carabiner loading

Maybe it’s due to the pressure of the biner against the not perfectly flat tree. Makes an edge that it’s resting on due to the curved surface of the trunk, more noticeable in smaller trees. Some recommend using a triangle instead of carabiner, I guess it handles the side pressure better.
 
Tr33_n1nj@ said:
Maybe it’s due to the pressure of the biner against the not perfectly flat tree. Makes an edge that it’s resting on due to the curved surface of the trunk, more noticeable in smaller trees. Some recommend using a triangle instead of carabiner, I guess it handles the side pressure better.
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That makes sense. Thanks.
 
Nice thread, very useful info. I was curious if it's safe to load a biner over an edge and this just answered that question and more. Which will allow me to be safer as I'm climbing knowing I'm not over stressing a biner. Thanks for this, My biggest fear when climbing is gear failure and it affecting my 1 yr old son not having his dad around
 
I understand that using a carabiner to girth hitch around a tree is similar to loading on an edge.....but isn't it likely an extremely mild version of it?

I'd like to see a test on this.
 
Oops. Just saw this thread right after I started one. What are some common options for this attachment method? Every link type I have seen gives a kn rating after tightening gate with a wrench. Lol. I doubt anyone is actually carrying a wrench up the tree with them. Are there better options out there?
 
stevethebreeze said:
Ok now Im confused with the lingo here and scared to go up a tree. I havent even got my saddle yet!!!
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Something I have learned as a novice...anytime you think of an idea and say "man this way I just thought of is so much easier I can beleive all those guys who do this all the time haven't thought of it yet!" Stop yourself and research. You may get away with it, but there may be potential for failure under the right circumstances. Like electricity, yes that #14 wire is way cheaper and it works...until it doesn't and burns your house down.
 
So, in that pictorial diagram I seen a carabiner with 2 carabiners connected to it with an "OK" but then I see a carabiner with 2 carabiners connected to it with skull and cross bones. See why this is so confusing to us noobs and confusing???
 
stevethebreeze said:
So, in that pictorial diagram I seen a carabiner with 2 carabiners connected to it with an "OK" but then I see a carabiner with 2 carabiners connected to it with skull and cross bones. See why this is so confusing to us noobs and confusing???
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The"OK" one is with a delta link [steel and can be loaded pulling from both of the corners (as pictured)] where as the "skull and cross bones" is using a carabiner, which are not designed for the outward forces pictured)
 
So if a person had 2 carabiners on a linemens belt connected to a carabiner on a bridge it wouldnt be safe and would need to use a Delta Link on the bridge? I know that would be a weird setup but is that the gist of the thread?
 
stevethebreeze said:
So if a person had 2 carabiners on a linemens belt connected to a carabiner on a bridge it wouldnt be safe and would need to use a Delta Link on the bridge? I know that would be a weird setup but is that the gist of the thread?
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No. This thread is about a carabiner on the end of your tether wrapped around the tree with the working end of the rope going through it. The system you set up I think is fine as the carabiners are all being pulled straight of their individual orientations, though in slightly different directions in space.
 
Utkjsilver said:
No. This thread is about a carabiner on the end of your tether wrapped around the tree with the working end of the rope going through it. The system you set up I think is fine as the carabiners are all being pulled straight of their individual orientations, though in slightly different directions in space.
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Ok, thanks for the clarification!! Feel much better now.
 
I have really been looking into this since I was questioned on it. I have not came across anything definitive but here are some resources I have found and maybe as a community we can dig until we find the proper answer

Cinching and retrievable anchor for spar work in tree removals

Clipped from :

Rescue, Safety, and SRT Webinar w/ Rich Hattier from ISC - TreeStuff.com
Clipped from :

Arborist SRT canopy /spar anchor with dmm ring
Clipped from :

How to Clean and Maintain Climbing Carabiners w/ Taylor Hamel - TreeStuff Webinar Series
Clipped from :

Test on choked carabiner as anchorage.
Clipped from :

Finally I will note that Petzl has the referenced Tether option depicted at the following link

https://www.petzl.com/US/en/Profess...ngle-mode-with-CHICANE?ActivityName=Tree-care>


Hope this helps and again I am not promoting either option and only sharing what I have found in my own search.
 
Tr33_n1nj@ said:
Maybe it’s due to the pressure of the biner against the not perfectly flat tree. Makes an edge that it’s resting on due to the curved surface of the trunk, more noticeable in smaller trees. Some recommend using a triangle instead of carabiner, I guess it handles the side pressure better.
Click to expand...
Yes. Garett has a good section about this phenomenon at the end of his DIY Sportsman video on one-stick climbing:
 
Here is an excellent YouTube video of side load destructive testing. Note that some of these carabiners fail at relatively low load bearing forces I think one at just 870 lbs. Granted it’s a wire gate carabiner but still. I’d bet some of us are using them.
 
raisins said:
I understand that using a carabiner to girth hitch around a tree is similar to loading on an edge.....but isn't it likely an extremely mild version of it?

I'd like to see a test on this.
Click to expand...
i hunt with a choked caribiner exclusively the geometry and forcess are not the same as hanging it over an edge. choked around a tree even a verry small one, it is just an eye loop at that point .your tether comes out away from the tree not wrapping back around itthere is very little force on it.between petzels paperwork and the test video its a little silly to be scared of. all rated products are desighned to bend and stretch to an oblonged shape so that you can visualy inspect it and see its warped and it needs replaced be for it breaks they dont just snap .and for a reason .its my job to visualy inspect for warping as a sertified rigger.so i know i and my kids are safe when choking a tree with a carabiner .however if you dont know you are safe you shouldnt be doing it.period... be safe and dont do what i do.
 
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