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Chockstone Forum - Gear Lust / Lost & Found

Rave About Your Rack Please do not post retail SPAM.

Poll Option Votes Graph
use them as twins only 0
 
as doubles only 16
80% 
as doubles then twins higher on the pitch 1
5% 
as twins then doubles higher on the pitch 2
10% 
twin ropes must be identical twins for confusion 1
5% 
If double ropes are identical, cut one fo ID 0
 

Topic Date User
cut(e) twins or double trouble? 28-Jul-2009 At 4:12:12 PM southcol
Message
On 28/07/2009 One Day Hero wrote:
>On 28/07/2009 The good Dr wrote:
>>Be aware that using double 'half' ropes as a twin pair increases the
>force
>>on the runners as you decrease the overall 'stretch' in the system. This
>>is an important consideration, particularly on sus gear.
>
>Not really, it's not. Doubles are very strechy and I doubt my two new
>doubs are less stretchy together than my one old single Also, most trad
>falls are not high factor, dynamic belay is much more important IMO.
>
I remember reading a report on impact force testing (using standard FF 1.77) for half ropes using the single rope standard weight of 80kg. The impact forces recorded were about the same as a single rope.
Not sure how the impact force would register for 2 half ropes and 80kg test, I would imagine higher than a single.

found something on it here:

http://gravsports.blogspot.com/2006/11/single-and-half-rope-impact-forces_30.html

There are 23 replies to this topic.

 

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