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Belay Device

August 14th, 2008

Belay Device
Paracord for a Prussik?

As a climbing instructor I hear/see all sorts of crazy things. The latest is a student that told us about him using paracord as Prussik as he didn’t have proper Tech cord and hadn’t expected to rappel. I doubted his story as he was vague on details or unable to answer my questions. The Prussik was allegedly used on the tail end to hold rope NOT above the belay device.

If you used paracord as a Prussik, I want to know the following:
- how many wraps did you use?
- how many strands of climbing rope were you rappeling on, one or two?
- did you use one prussik or two?
- how safe did you feel?
Beach bum: I specifically asked about “real” paracord NOT 7 mm Tech cord. Thank you.

I wouldn’t be TOO surprised if it worked ( I assume you mean he was trying to use it as an autoblock device). The smaller diameter the rope, the better gripping power it has in a friction knot, typically. I would worry about it burning if it slipped though. Seems like that kind of nylon would have a lower melting point, but I don’t have any evidence of that, just seems so from an initial look. Of course, I will always choose & recommend “proper” climbing equipment over homemade/substituted anything. Climbing gear manufacturers do extensive testing and engineering to ensure the safety of their products, and it’s hard to say what features may be engineered into cordelette that para cord is lacking, which could prove potentially fatal. I have used 8mm cord and not felt as safe as when I used 5mm cord, which is now my primary choice. As for where to place it, I always place it below the belay device, as this seems to be the standard now and it has performed much better for me.

And as for the guy that told you that story, I would doubt it as well. Why would he have a climbing rope, harness, belay device, and not expect to rappel? I would assume maybe he was sport climbing and had to back off a route halfway. Well in that case, I always carry a little bit of gear just in case, and if I wouldn’t bring backup climbing gear like some webbing or cord, why would I bring para cord???? Just doesn’t really add up to me.

Climbing Tools: Rap Safety- Part 3- Belay Device/prussik

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