Figure-8 Device Blocks for Canyoning 2021 Catching up with another canyoner recently they showed me a failure method for a particular Releasable Figure-8 Device Block (Releasable-8 Block) used as a setup for abseiling in a canyon. Correct Rigging Correct Rigging Incorrect Rigging This block is called Releasable-8 Block V1 (for reference purposes) – above left and […]
Rock Thread and V-thread Testing 2021 The question we are going to answer in this post is: When you drill a hole through a rock and thread a cord what is the best setup for bends, cord and rock strength. We have used an 8mm Nylon cord for cave rescue and a 6mm Dyneema cord […]
Webbing in hangers The question we are going to answer in this post is: Is it ok to rig using webbing directly into new bolt hangers? I have rigged and used both inline and two-point anchors in a canyoning situation for years and never had any reason to be concerned. However, it was time to put […]
Back-tie rigging – tension and compression forces The other day I had a question come through about how I worked out the tension and compression forces for a post, pole or tree when you back-tie for support. The context? Before I get to the question, we need to set the context: The front anchor is […]
Introduction I was recently undertaking testing to confirm our cave rescue setup (see the post Let’s lighten the load – update). In cave rescue, as we use the double sheet bend for rigging – being easy to adjust, especially in the middle of a rope or cord – I thought it would be a good idea to […]
