SRT article

[treebing]

Just thought Id give this article its own post. Excellent. For those who are skeptical of SRT for the 2x the force on the TIP, there is an excellent explanation in here of how SRT enables you to access crotches that would not be okay in Ddrt. Gotta play with the angles and think about compression wood.

 

[Tr33Climb3r]

for some reason it doesnt load for me

 

[moss]

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for some reason it doesnt load for me

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Do you have Adobe Acrobat installed?
-moss

 

[southsoundtree]

On page 6 of the article, there is the running alpine butterfly. Is it necessary to thread the end of the rope through the butterfly, or is there something that I'm missing?


That is a really good RAB technique that I hadn't thought about using. Previously, if I wanted to choke a line for non-doubling SRT connection, I'd have clipped/ tied another retrieval-only rope to the loop to pull it loose. This enabled a TIP around the trunk of a tree, when the throwline, then rope was only crotched over a small/ dead stub that would not be appropriate for a ground anchoring.

The downside is that there is no ground lowering system, and a rescuer needs SRT gear for rescue.

I've typically used a RADS system, until recently, for climbing SRT, which means that I can lower at any point without having to add anything to the system, such as F8 Revolver system. I like the GriGri in part because of the idea that the ground person can affect the speed of descent with a Fireman's belay, in the even to two incapacitated hands on the climber (maybe a crush injury), providing the climber can flip over the lever and depress with their elbow or forearm.

 

[Adkpk]

[ QUOTE ]
On page 6 of the article, there is the running alpine butterfly. Is it necessary to thread the end of the rope through the butterfly, or is there something that I'm missing?




[/ QUOTE ]

Without going back into the article to find what use "they" used the alpine butterfly for I will say, first: Yes you have to run the rope through the knot. But what I think they use an alpine butterfly for is when they need to attach a second rope to the system with a biner and a pulley.

 

[allmark]

[ QUOTE ]
[ QUOTE ]
On page 6 of the article, there is the running alpine butterfly. Is it necessary to thread the end of the rope through the butterfly, or is there something that I'm missing?




[/ QUOTE ]

Without going back into the article to find what use "they" used the alpine butterfly for I will say, first: Yes you have to run the rope through the knot. But what I think they use an alpine butterfly for is when they need to attach a second rope to the system with a biner and a pulley.

[/ QUOTE ]

They are using the alpine BF to choke the limb and reduce the load but unlike a bowline it can be reversed at the ground for retrieval.

 

[countryboypa31]

You could use a midline running bowline. This way you don't have to feed the line through.
How to tie a midline running bowline.
I use it for a different application but the same knot can be used if a limb is isolated and you want to choke it off. If using it like in the article you would pull your ascent line up and over the isolated branch. Once it passes over the branch union you can tie the midline running bowline around the throwline (make sure to back it up, as its for life support) and continue to pull your line up till the knot cinches up tight against the branch.

Much easier in my opinion. It can also be untied once you reach the top to make it easier to retrieve. Or for any other reason that you might not want to keep it tied (with the alpine butterfly you would have to pull the entire rope through it before you could untie it.)

 

[Adkpk]

To save on words, here's how I tie off at a limb. You can see the throw line tied on for retrieval from the ground.

 

[Tr33Climb3r]

[ QUOTE ]
[ QUOTE ]
for some reason it doesnt load for me

[/ QUOTE ]

Do you have Adobe Acrobat installed?
-moss

[/ QUOTE ]

Nevermind I got it...I don't think i was patient enough

 

[MattyD]

They also have a couple really good articles on Redirects and working angles.

Here is a link to the Redirect article http://vtio.org.au/Content/wp-content/uploads/2010/07/Introduction-to-Redirects.pdf

If you haven't read it, you should take a sec to look it over. Explains things really well

 

[KentuckySawyer]

Thats a great article , Bing. I'll definitely share that with all the Limbwalkers. Very concise and helpful for helping to understand SRT and the systems involved.

 

[familytree]

Great article. Cormac taught me a few good tricks at last years fall climb but I was so....ummmm.... Tired, then strangely hungry and laughing that I forgot it all.

Thanks for the refresher

 

[JoeH]

Thanks for the positive comments guys. These documents are deisgned to be 'works in progress', and we hope to get the chance to regularly update them with ideas sent in from all over the place. So far, I have to admit that I've been a bit swamped by all the suggestions, but sooner or later all of the PDFs will be updated with the new redirects, knots and SRT systems that people have been emailing.

What I'm getting at is that your thoughts and criticisms, and particularly any ideas that you have that you'd like to share, would be much appreciated, and will be included in the documents for their next revision. You will of course get full credit for any inventions!

You can check out all of the downloads at

http://vtio.org.au/Content/downloads/

Thanks for any input you feel like offering!

Joe

 

[treebing]

can this be permanently placed in the ARTICLEs section of treebuzz?