Abseiling: 5 ways to improve. Lessons learnt from abseiling in a canyon. When I first started canyoning several years ago I had to adapt my abseiling (rappelling) technique to this environment. A few things were the same and many things were different (or as is often said ‘same-same but different’). I had come from a […]
3-Point Anchor Testing Updated and revised by Grant Prattley, OTE Rescue 2014. Based on original work by SARINZ Trust 2005. We started to research 3-point anchor loading as a result of questions asked by both instructors and students. At the time we could not find any articles or testing on this subject area. To date […]
Snow Anchor Placement A few pages exerted from the Rope Rescue & Rigging Field Guide. A quick overview of snow anchor section and placement options with strength ranges in different snow types. Put in your first name and email address and I will send you a download link.
Rigging Myths and other things rope NZOIA Symposium Paper, Tihoi, October, 2014, by Grant Prattley. At the NZOIA conference at Tihoi we had a bunch of people out for half a day breaking and load testing various components in rope systems and maybe a few myths along the way. Back in the classroom, we discussed […]
Knots Safety Check How to undertake a knots safety check before use A knots safety check is a really important step in your rope work just prior to use. You will learn how to go through a 6-step systematic quality check for each knot, bend or hitch. This includes: aligned, tightened, tail length, loop size, fit […]
Systems Analysis: When does 1=4.5 Updated and revised by Grant Prattley, OTE Rescue 2014.Based on original work by SARINZ Trust 2010.Article for Tomo Times, NZ Speleological Society, Waitomo, New Zealand. It seems to happen you strike the trickiest part of rescue rigging around 4am in the morning, in the wettest part of the cave at […]
Soil Anchor Report A report by Chris Gallagher, Field Equipment Officer, Australian Antarctic Division, March 2011. This report presents methods, discussion and recommendations in relation to appropriate rope rescue anchors and rigging systems needed for Macquarie Island. This testing has relevance to other rescue teams that need to carry ground anchors to the rescue site. […]
Rope Grab Test Report Grant Prattley, Lindsay Main and Andrew Welsh, New Zealand Land Search and Rescue, February 2001. Many rope grab devices are used by the rescue technician for a variety of functions in a rope rescue system. This study focuses on rope grabs used in a slow pull situation as used in a rescue hauling system to […]
Snow Anchor Report Snow anchor testing for a variety of common anchors A report by Don Bogie, 2005. The strength of snow anchors is dependent on a combination of the strength of the snow in compression and shear, the strength of the materials the anchor is made, the strength and placement of the attachment system, and the mode […]
An introduction to Pulley Systems: Pulley system setup Types of pulley systems – Simple, Compound and Complex Mechanical advantage – for simple systems Pulley progression – 3:1-5:1 Put your first name and email address below and Ill send you a 20-page pdf.