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Topic - Half Ropes as Twin Ropes - Impact force?

RKernan - on 21 Feb 2013
Sitting at work, bored and skiving and thinking about ropes.

So, using half ropes as twin ropes (ie. clipping BOTH ropes into ONE piece of gear). If you fall, the impact force will be absorbed by double the cross-sectional area than it would if you fell on one rope alone. Does this double the impact force?

Been trying to do the maths (underworked engineer) but am unsure how to approach it.

I've always been told that using halves as twins was a bad idea for this reason but haven't seen the proof. It also doesn't explain how triple rated ropes are possible.

Is anyone able to shed light?
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