Join Date: Dec 2009
Location: Bangor ME, Berkeley, CA
Thanked 8 Times in 8 Posts
Rep Power: 11
Re: Tether overload protection
Here are a few links you may find helpful:
Most climbing slings are rated to 22 kN which is about 5000 Lbs.
I would avoid dyneema slings as they do not have good abrasion resistance and tests have shown that knotting them significantly reduces breaking strength.
I suggest you look into the Personal Anchor Systems (PAS) used by rock climbers. I use a Metolius Ultimate Daisy Chain as my PAS: (NOT to be confused with the sewn daisy chains that are used for aid climbing.)
Metolius also makes other models as do other manufacturers:
These consist of a series of sewn links formed up into a chain which a climber then girth hitches (Lark's head to sailors) onto their harness. The chain links allow the climber to vary the length of the PAS by attaching to different links and to add redundancy into their anchor setup by attaching different points in the chain to different points of protection.