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Topic Date User

Slack line anchors !?! 8-May-2012 At 10:32:50 PM Cool Hand Lock

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There's two things wrong with the "Slack lining" anchors at Brooyar.
Undersized for reasons explained in my previous post and also they are placed in each others "coning zone"

The expert on coning would be The Good Doctor, or Natimuks Sir Geoff Little.

They are 10mm stainless. Look at the rating of 10mm stainless bolt in shear. It's close to the load your exerting on the bolt. Which means over time you'll stress it, flex it and eventually it'll be weakened/brocken. A bolt rated for 2400kg SWL would be about 14-16mm

I'd use a properly rated industrial point. Cheap from the rigging supplies. I've placed them with 14-20mm shanks, rated to 20ton SWL. Cost about 20 bucks each.

The guys ended up rigging from a tree and using the 10mm points only as a diversion. Which would have put a 200-300kg load on the anchor. Perfect result. Anchor will last forever. No need to re-drill the anchor in 5 years time.