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Topic Date User

Breaking a biner 4-Mar-2013 At 8:50:21 PM egosan

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On 4/03/2013 Mike Bee wrote:

>Where does the heat come from to melt through the sling? I wouldn't have
>though there'd be enough movement in the sling/biner system to generate
>enough friction to melt through the sling. I can imagine the sling getting
>glazed or singed, but not melt through.
>Keen to be corrected though :)

I am not sure where it would be coming from on a ring. However, he may be referring in someway to the work by DMM and BD's QA people. Both of which have videos online of knots in dynama/spectra slings failing at scary loads because of the low melting point of those sorts of fibers and the large amount of friction generated heat in tightening a knot in a factor 2.

One of the videos is just tying knots in slings and the other is girth hitching 2 slings together. That one is good and scary.