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Dodgy toprope anchor testing 16-Oct-2015 At 10:01:09 AM mikllaw

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On 16/10/2015 IdratherbeclimbingM9 wrote:

>A question for mikl;
>>the rope snapped in the un-knotted section, not supposed to happen unless
>you have variable strength.
>I note the stopper knot on the clove hitch, which presumably prevents
>'rope' slippage, so would the failure mode be different without that if
>it was fully rated climbing rope instead of Bunnings rubbish?

The polyester was very slippery so I put it in to limit slip. Nonetheless I expected the rope to break at a knot, the only way the rope can break in the straight section is if the rope locally is weaker. Clove hitches are about 60% strength, so the rope at 1 point was 60% of the average strength. You wouldn't expect this strength variation with a well-made climbing rope.