Introduction For backcountry rescue, the aim is to use lighter weight gear balanced with functionality and performance. A couple of years ago, I made up a lighter weight jigger (4:1CD/5:1 pre-rigged pulley system) using a 6mm cord made with a Dyneema core with a polyester sheath. Although we did some initial testing with a 5mm […]
Webbing anchors: efficient rigging and 16mm testing
What’s in this webbing anchors post? The basics for webbing anchors: So you know why you are using webbing anchors, what to use, set up and four ways of rigging. How to rig webbing anchors efficiently: Get the right (minimum) webbing length, rather than halfway through a rigging job finding out you are short and have […]
Figure-8 Device Block for Canyoning
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 […]
Canyon Rope Rescue Testing
Canyon Rope Rescue Testing 2021 In February 2019, a team of people from the NZ Canyoning Association got together for a weekend to discuss setting up CanyonSAR for New Zealand (as a specialist discipline under New Zealand Land SAR). As part of this weekend, we discussed and practised rope rescue in the canyoning context with […]
Rock Thread and V-thread Testing 2021
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
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
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 […]
Double sheet bend; but it’s fine?
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 […]
Let’s lighten the load – update
Let’s lighten the load – Update. After a particularly arduous 24hrs underground and 1000m of hauling on a deep cave SAREX (Search And Rescue EXercise), we started our journey towards asking the right questions about rope rescue. Could we lighten up our backcountry rope rescue gear while keeping acceptable safety margins? For lightweight rope rescue, […]
Floating anchors: But what if the anchor blows?
Introduction Floating anchor: but what if the anchor blows? Isn’t it going to rip the other anchor out? I hear this as a common statement quoted back to me when talking about a two-point floating anchor (aka self-equalising, magic X, etc.). I can only think it’s based on the assumption you have: Built or chosen […]