Petzl Adjustable Rope Bridge

[TimBr]

Has anyone used the Petzl Connect Adjust in SRT mode with some sort of friction device above it (such as a rope wrench/hitch, ect)? - I wonder if it could work.

Thanks

First, take what I say with a grain of salt. I just looked at a few images of this device, and it seems to me that it would be a mistake to try to use it in the way that you have in mind.

A better alternative, if you are using the smaller line that comes with the hook, would be the Trango Cinch.

The reason I think it would be a mistake, and possibly even life-threatening, is that it looks to me to be capable of adjustment only after being unweighted. Furthermore, I think it is intended to be adjusted relatively infrequently, and somewhat permanently. Its intended use is to allow a climber to put a bunch of slack in their rope bridge in order to make it easier to pull slack through a hitch that sits a bit higher above you, I think, for DdRT, I'm thinking. Then once a climber gets up top, they can unweight and adjust it shorter, again. It is not meant to have a rope running through it on a descent, and I think it is not capable of being used in this way, just by looking at it.

Even using some of those ascenders which are basically intended to be one-way devices, like a Gibbs, for example, is not something I would recommend as the sole device on a line. The reason I say this is that it is sometimes extremely difficult to take your weight off of an ascender, and if it can only be disengaged when unweighted, you could find yourself stuck there.

The Trango Cinch has a lever on it that can be gently pried on, to release yourself even if all of your weight is fully loaded onto the Cinch, and you have no way of unweighting the rope, for whatever reason.

A hitch and pulley with a Rope Wrench or Hitch Hiker will also work. I've never owned the Gri Gri, but it is supposed to work on larger lines, but not smaller ones, if I'm getting the story straight.

That's about all I have for now, except to say it might also be possible to use the hook DdRT by adding a micro pulley at the bottom of the hook. Then all you would need would be two biners, two micro pulleys and the hitch cord Dave is about to send to you.

Tim

 

[123Craig]

Okay the PRA:

Allows the 11mm rope to cinch down in 1 direction, and when pushed down, it allows the rope to run freely. Now adding a tether & ZK-2 RW, will slow the 2ndary rope exponentially. But what are you using for a rope ascender/descender on the primary rope?

Thanks Dave - maybe I should have specified that my climb line would not be used in a V-Rig configuration. I'd be on BDB for primary - but that doesn't matter - as the primary and secondary climbing systems would be independent of each other, ie - there'd be a bight (loop) of rope hanging beneath me. The Connect Adjust and friction device would be operating completely on it's own in SRT on the tail end of the line.

 

[Dave Rohach]

Okay, got ya! Then you should (in theory) should work, as long as, the PBA, isn't being used as a primary climbing system. There are too many variables, being the maximum rope size of 11mm for your 2ndary system. So, if the loop you're describing is the remaining portion of your primary climbing rope. Am I getting the full picture yet?

 

[123Craig]

You got it!!

Theory sounds legit right? - Reality might be a whole different story. I just don't have any of the gear to test it.

 

[Dave Rohach]

Well, that blows my theory out of the water! What do you need to facilitate your idea?

 

[123Craig]

First, take what I say with a grain of salt. I just looked at a few images of this device, and it seems to me that it would be a mistake to try to use it in the way that you have in mind.

A better alternative, if you are using the smaller line that comes with the hook, would be the Trango Cinch.

The reason I think it would be a mistake, and possibly even life-threatening, is that it looks to me to be capable of adjustment only after being unweighted. Furthermore, I think it is intended to be adjusted relatively infrequently, and somewhat permanently. Its intended use is to allow a climber to put a bunch of slack in their rope bridge in order to make it easier to pull slack through a hitch that sits a bit higher above you, I think, for DdRT, I'm thinking. Then once a climber gets up top, they can unweight and adjust it shorter, again. It is not meant to have a rope running through it on a descent, and I think it is not capable of being used in this way, just by looking at it.

Even using some of those ascenders which are basically intended to be one-way devices, like a Gibbs, for example, is not something I would recommend as the sole device on a line. The reason I say this is that it is sometimes extremely difficult to take your weight off of an ascender, and if it can only be disengaged when unweighted, you could find yourself stuck there.

The Trango Cinch has a lever on it that can be gently pried on, to release yourself even if all of your weight is fully loaded onto the Cinch, and you have no way of unweighting the rope, for whatever reason.

A hitch and pulley with a Rope Wrench or Hitch Hiker will also work. I've never owned the Gri Gri, but it is supposed to work on larger lines, but not smaller ones, if I'm getting the story straight.

That's about all I have for now, except to say it might also be possible to use the hook DdRT by adding a micro pulley at the bottom of the hook. Then all you would need would be two biners, two micro pulleys and the hitch cord Dave is about to send to you.

Tim

Thanks Tim - been around the whole Trango circle on the hook thread though. The 11mm limit makes it a no-go for my line. It seems like the 11mm limit on the Petzl Connect Adjust might make it no-go also; though I'm happy to see what potential may/may not come of the idea (for anyone) anyway. Hitch cord always an option - though always want to try for easier/quicker options.

 

[123Craig]

Well, that blows my theory out of the water! What do you need to facilitate your idea?

View video; just clip it to the middle of your bridge, put a rope wrench/some sort of friction above/any device to take a lot of the weight off the Connect Adjust (even if it's a hitch - just to test the theory) - see how it works/doesn't work...

 

[Dave Rohach]

That's where I couldn't get my point across, you're limited to a maximum of 11mm rope, I believe Moss said something about the GriGri II is able to accept 11.5-11.7mm rope. That would be the only other setup that would suit your needs. The only other method is an E2E & fixed pulley, standard VT configuration. IMO...[emoji857]

 

[Dave Rohach]

The PBA is rated for 23kn, industry standard. So in theory can and is used for life support. If it's capable of being a life support device for your saddle bridge, it would seem to be capable of being a suitable rope grab. The video clarified your entire train of thought!

 

[jmaher]

it seems to me that it would be a mistake to try to use it in the way that you have in mind.

The reason I think it would be a mistake, and possibly even life-threatening, is that it looks to me to be capable of adjustment only after being unweighted. Furthermore, I think it is intended to be adjusted relatively infrequently, and somewhat permanently. It is not meant to have a rope running through it on a descent, and I think it is not capable of being used in this way, just by looking at it.

Even using some of those ascenders which are basically intended to be one-way devices, like a Gibbs, for example, is not something I would recommend as the sole device on a line. The reason I say this is that it is sometimes extremely difficult to take your weight off of an ascender, and if it can only be disengaged when unweighted, you could find yourself stuck there.

The Trango Cinch has a lever on it that can be gently pried on, to release yourself even if all of your weight is fully loaded onto the Cinch, and you have no way of unweighting the rope, for whatever reason.
Tim

This echoes my thoughts.. Just put into words far more articulately.

 

[Greg_L]

Apologies for the necropost, but I have an on-topic, applicable safety question/concern. Several pages back, this topic devolved into what the various options were for bridge adjusters, particularly on petzl Ring-opens, and the Roll n Lock was brought up.

What do we think/how do we feel about this little gem on treestuff? I kinda thought the MBS didn't matter as long as the tail was backed up to the harness rings, but they seem to disagree...any rope shredding incidents or other updates I've missed?

 

[Richard Mumford-yoyoman]

Should be an interesting discussion.
Who starts interpreting the manufactures user instructions and by doing so, opens themselves to the liability of every other device that some lawyer thinks should have had a similar warning. TS/ST can stipulate anything they want but what are the implications in doing so? Do they become a regulating agency for gear checks?
IMO, this is bigger than a rope clamp. Will this apply to every rope clamp, not to be used as life support, so in essence you would never be able to remove your primary support to pass it over a redirect? Rope clamps would not qualify as a second life support when using a chain saw.......
listening.......

 

[WaitakKauri]

I watch pretty close on adjustable bridges and I haven't heard anything negative.

I received a Roll n lock for Christmas and it's already been awesome!

 

[96coal449]

I bought the rolling lock to adjust the bridge on my MCRS. Seems though the CT wants to pass through the ring. I abandoned the roll n lock. I bought another rope grab to use with a pear shaped biner. I chose the ART positioner. It's small, compact, and easy to adjust. I want to use a stopper knot and have a detachable bridge on one end, hence the biner. I plan on leaving the ring as a "rope keeper". I want the detachable bridge because of the nature the way you have to step through bridge and then the "leg straps". The detachable bridge eliminates one obstacle of adorning that saddle. Anyone have any thoughts or suggestions to this feel free to comment.

 

[96coal449]

What I mean by pass through is the ct is installed PAW style.

 

[Richard Mumford-yoyoman]

I bought the rolling lock to adjust the bridge on my MCRS. Seems though the CT wants to pass through the ring. I abandoned the roll n lock. I bought another rope grab to use with a pear shaped biner. I chose the ART positioner. It's small, compact, and easy to adjust. I want to use a stopper knot and have a detachable bridge on one end, hence the biner. I plan on leaving the ring as a "rope keeper". I want the detachable bridge because of the nature the way you have to step through bridge and then the "leg straps". The detachable bridge eliminates one obstacle of adorning that saddle. Anyone have any thoughts or suggestions to this feel free to comment.

The Petzl ring open works well with the style of rope clamp, rollnlock or Kong.

 

[Brocky]

With the astronomical increase of people dropping out of trees due to misusing this device in this situation, it's good to have smarter and wiser individuals looking out for us in our abundant ignorance.

 

[Richard Mumford-yoyoman]

Imagine if you combine this with unauthorized cordage on your Treemotion.

 

[Greg_L]

Imagine if you combine this with unauthorized cordage on your Treemotion.

Good gracious...Teufelberger'd be knocking on your door.

 

[Richard Mumford-yoyoman]

Well I look forward to the specifics on the use of the Pinto pulley.
In the meantime, I'll read the instructions for use published by the manufacturer, make my own decisions in regard to my life and shop where I am allowed to do so.