Purcell Knot

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Justin
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Joined: Sat Apr 30, 2005 8:31 am
Real Name: Justin Lawson
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Purcell Knot

Post by Justin » Tue Jan 10, 2012 1:05 pm

This topic was split from the Via Ferrata in the berg thread WRT using a Purcell knot on a Via Ferrata

Good suggestion from David (

A Purcell Prusik is a related cord popular among cavers and rope-rescue people. A somewhat longer loop than the normal Prusik is used around the rope, then a second Prusik is used around the cord loop itself to form a foot loop. The foot loop is then easily adjusted in length and position.

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David Vallet
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Re: Via Ferrata in the berg

Post by David Vallet » Tue Jan 10, 2012 1:15 pm

J,

I know it as a lanyard, that is a closed system fixed to the harness (rope tie in).
Were a prussic forming a part and integrated in the lanyard,
wraps around the lanyards extension, making it a closed system.
The prussic part of the lanyard can be adjusted and in turn adjusts the
length of the lanyard.
It also 'slips' under higher loads, creating a dynamic.

Best
D

David Vallet
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Joined: Sat Feb 09, 2008 12:13 pm

Re: Purcell Knot

Post by David Vallet » Tue Jan 10, 2012 1:44 pm

Edit - Some context...
It was suggested as a means of protecting oneself,
on a traverse section of a via-feratta.
Were the safety cord runs above the individual, and the purcell lanyard
can be adjusted so as to keep a minimum amount of slack in the system.

(Alright, I should really leave the forum alone now)

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