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Topic Date User

Slackline - fatigue effects on biners? 16-Jun-2010 At 3:48:13 PM Climboholic

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I broke a biner on the weekend.
I was out trail biking when I saw a P plater go down a road that I knew he'd never get through in his work ute. Anyway, half an hour later he came walking up to out camp asking for a tow. I asked him if he had a snatch strap and he said yes but nothing to hook it up with. I had a 25kN biner in the car so I did a quick calculation and figured 2.5 tonnes should do it. I manoeuvred the Forester into position, hooked it up and gave it a go. The biner snapped on the second try. I scratched my head and wondered why it had failed. Then I asked him again if it was a STRETCHABLE snatch strap? "Ahh, no, maybe not". Evidently the dynamic load from the momentum of the car exceeded 25kN.
Some people should be banned from going outdoors.