Originally Posted by Troglodyte
A 220 lb hanger (including gear) would have to approach an support angle of 5 degrees to reach the ratings on these biners.
I figure my hang angle is never less than 20 degrees and that only puts about 1.5 kN on each support. (and I don't weigh 220 lbs with gear)
Wrapping it around a tree essentially halves that number.
4.9 kN rating should be fine for normal hanging.
Climbing gear such as the Nano are made to withstand shock from falls. Kinda overkill for us.
IANARP - WWYP
Oh, and I would pony up for a couple at least and probably 6.
Maybe I didn't make myself clear about my concerns when going to a lighter duty carabiner.
I was concerned about any bending type forces that might occur if used on the end of webbing where the webbing is wrapped around a tree. Depending on how things line up, the carabiner might not just have in-line forces applied to it. The forces may try to bend the carabiner to fit the curve of the circumference of the tree. I don't think the strength of carabiners to this type of force is specified, I think it is a try it and see thing. (If you take a tree branch, just because you can't break it by pulling on it in opposite directions doesn't mean you can't break it by pulling on the ends while the center section is held against a tree.)
Also, I'm not sure I agree with your statement that wrapping the webbing around the tree halves the forces on the carabiner. The friction between the tree bark and the webbing come in to play and can put most all of the force on the carabiner depending on how things are aligned. If the webbing slide around the tree and self-centered the split point, the carabiner in this case, then I would agree with the half force statement... when that doesn't happen I don't think that the forces are equally split.
I hope they work fine, I just had a concern. I had concerns when folks first started talking about using the light weight Camp Nano Wire carabiners too.