Necessary weight rating needed for biners only attaching straps around trees.

**Junebugdawn** · 07-25-2014, 12:43

I have seen people say that climbing rated biners are required for attaching tree straps around a tree. I have seen pics of keychain type biners stretched out that were used for this purpose. What I'm referring to is when a biner is used to go through the end loop on a strap, the strap goes around the tree, and the biner is clipped over the other side of the strap. (As in how a Dutch clip works.)
My question is this...
Has anyone done any weight testing to see exactly how much pressure is placed on the biners in this application??

I know the keychain type biners are not strong enough, but there are larger biners that have ratings around 80lbs that are not as large or expensive as climbing rated biners.

**gmcttr** · 07-25-2014, 12:58

No doubt you could get by with less than climbing rated biners, but they won't have the versatility of rated biners.

http://shop.whoopieslings.com/Nano-2...rs-Nano-23.htm

**Zilla** · 07-25-2014, 12:58

Originally Posted by Junebugdawn

I have seen people say that climbing rated biners are required for attaching tree straps around a tree. I have seen pics of keychain type biners stretched out that were used for this purpose. What I'm referring to is when a biner is used to go through the end loop on a strap, the strap goes around the tree, and the biner is clipped over the other side of the strap. (As in how a Dutch clip works.)
My question is this...
Has anyone done any weight testing to see exactly how much pressure is placed on the biners in this application??

I know the keychain type biners are not strong enough, but there are larger biners that have ratings around 80lbs that are not as large or expensive as climbing rated biners.

Yes, but i can't find the post,, pm rsgary from readystraps.com and ask him to repost the info with the diagram of how the angle from wich the strap runs thru the biner creates different stress limits. i have been looking for a refresher on this subject as well and would like to see it again,, it will answer your question too !

**Zilla** · 07-25-2014, 13:02

Originally Posted by gmcttr

No doubt you could get by with less than climbing rated biners, but they won't have the versatility of rated biners.

http://shop.whoopieslings.com/Nano-2...rs-Nano-23.htm

Thanks gmcctr, i clicked on that link and it seems that those biners are on sale again, gonna grab a set or two.

**Junebugdawn** · 07-25-2014, 21:46

I sent him a PM. We'll see if we can get some answers. :-)

**gmcttr** · 07-25-2014, 22:17

It will partly depend on your setup as well.

Tree Strap Angles.jpg

Originally Posted by Zilla

...how the angle from which the strap runs thru the biner creates different stress limits. ...

**Junebugdawn** · 07-25-2014, 22:22

Yes, I understand and always place my straps so they have as little pressure as possible pulling against the loop. I still wonder if any testing has been done to determine the range of pressure exerted on the biners being used in this mode.

**Phantom Grappler** · 07-26-2014, 20:12

Junebugdawn
I would feel safer with climbing rated carabiners
But if you used non rated carabiners--a way to reduce the stress on carabiner is to wrap the strap around the tree as many times as you can before snapping carabiner around strap--say a round turn or even one more wrap. This makes in essence what is called a Frictionless Hitch and there is very little stress on the carabiner especially if set as in the diagram that gmcttr and Zilla noted!!!

**CamoDeafie82** · 07-26-2014, 22:57

talking about THIS link?
http://www.bethandevans.com/load.htm

this image is what we usually think is acceptable....

I would think I want a carabiner or link to be as strong as the webbing itself is rated for...

**gunner76** · 07-27-2014, 00:15

Here is a picture of a non climbing rated binner I used to test hang a new DIY hammock. This is not a micro binner but a full size non climbing rated binner. I knew this would probably happen but I could not find my climbing rated binners so I took a chance. Luckily I was able to get out of the hammock before the binner let go complexity.

I was using 1" webbing with a loop at the end wrapped around a pier piling with the binner attached to the loop and the webbing back thru the binner. I forget the angle the webbing was coming out of binner.