/ ascender sheath stripping

This topic has been archived, and won't accept reply postings.
simondgee - on 30 Aug 2013
An ascender/croll will continue to bite when loaded until the force is so great it will strip the sheath of a rope. I'm trying to find some test data on the force at which that occurs? Any takers?
Stuart (aka brt) - on 30 Aug 2013
In reply to simondgee:

HSE/Lyon report on industrial kit?

Bob Mehew at BCA?
muppetfilter - on 30 Aug 2013
simondgee - on 30 Aug 2013
In reply to Stuart (aka brt):
Do you know if that is online...the usual petzl Ikea instructions for use are unhelpful...TBH I dont know how Petzl get away with instructions with pictures only and plenty of ambiguity.
simondgee - on 30 Aug 2013
In reply to muppetfilter:
aha! ta...
simondgee - on 30 Aug 2013
In reply to simondgee:
for the Croll 4.7-6.0Kn according to Lyons test for HSE on a low stretch.
Snowdave on 30 Aug 2013
In reply to simondgee:
> An ascender/croll will continue to bite when loaded until the force is so great it will strip the sheath of a rope. I'm trying to find some test data on the force at which that occurs? Any takers?

Way back in 2001 Lyon did a big lot of testing etc which was for the HSE and published a nice book...........have it but not to had at the mo...

Basically different brands/types of ascenders on different thickness/brands of rope produce different results..............how longs a piece of string?????

From memory a big fall on a toothed ascender will strip the sheath.........where as using a grooved cam instead of toothed (like the Petzl rescuecender, will not strip the rope sheath as it is kinder.......

but then the function of the teeth is to get rid of mud and cut through ice/snow build-up.........and toothed cams always have a bigger rope size range......

muppetfilter - on 30 Aug 2013
In reply to Snowdave: The document is available online if you follow the link I posted above, it is a lengthy bit of text but has some interesting research .... Enjoy ;0)

This topic has been archived, and won't accept reply postings.