No it does not.

What is the application here? What are you planning?

I am going to go out on a limb here and say that every person that can put on a saddle will be able to find a suitable friction hitch.

You're under two hundred pounds, so I know you're thinking something fishy. Tell us!

love
nick

... I want to understand more about tree climbing systems. Part of the education I need relates to this guideline.

I want to know the capabilities and limitations of the climbing systems I use. If I descend using SRT and a Petzl I'D, I know from Petzl's specifications for the I'D that the maximum "normal working load" is 150 kg. I'd like to know the corresponding weight limit for safely descending on a friction hitch using a dynamic climbing system.

Since the limit is above normal use, here's a hypothetical question that stresses the need to know this limit: (Referencing Joshua's post earlier in this thread) Could Joshua have safely "rescued" Tim if they each weighed 350 lbs.?

Brad

I guess this wouldn't be too tough to test. Climb up, set up in a dynamic double rope system, then clip a buddy to one of your d-rings!

However, you wouldn't be testing it if there was the possibility of failure. It might be a good idea to have other friends there to put one or both of you on a super loose "just in case" belay.

What climbing hitch would you use for this?

love
nick

Bradley,

I think your question shows an unclear understanding of how a friction hitch works. You do not descend on a friction hitch as you do on a descent control device such as an 8, rack, tube, or other device such as the I'D. Descent on a DdRT system, using a friction hitch, is controled by friction between the control hand of the person descending and the friction between the rope and the TIP. The friction hitch acts to prevent downward motion by providing enough friction inside the hitch when loaded to arrest motion of the running line. During descent you are forced to release the load on the hitch to make any downward motion.

This said, in a rescue situation (which is not what TEAR was describing) the incapicated individual should be lowered to the ground on his own rope and descent control system. The chances of an individual being able to control the weight of two humans on the same DdRT system using only the friction provided by his hand and the rope/cambium friction to control descent are poor. The addition of a descent control device, I would recomend a rack system whose friction can be adjusted per need, in place of the friction hitch would make it a safer, but still dangerous, opperation.

A little misunderstanding: Tim was definitely on his own rope and knot for our practice rescues. The specific instance I was thinking of was one exercise when he was "unconcious," and I had to have some of his weight on me in order to support his neck and back. The majority of his weight was still on his own rope, but some was on mine, since I was holding him.
Josh

Some of you teach DRT and verticle rescue. Do you present any guideline or information relative to this weight limit?