Grant Prattley

Founder and consultant at Over The Edge Rescue. Rescuer, instructor, guide, author, designer, and adventurer.

Reasons why jiggers don’t perform as well as they should

Reasons why jiggers don’t perform as well as they should

Reasons why jiggers don’t perform as well as they should As we head around various rescue groups, we find many jiggers (aka a set of fours) are rigged incorrectly or operate inefficiently. Despite leaving everything in good working order, we often come back at a later time and see the jigger fairies have come in […]

Progress Capture Testing for a jigger

Progress Capture Testing for a jigger

Progress capture testing for a jigger I was about to post an article about the jigger (aka a set of fours) – how to build (and troubleshoot) using a couple of small double pulleys and cord (coming soon). I tried to remember if I had ever tested the progress capture Prusik as this would be […]

Lightweight systems – testing to the next level

Lightweight systems – testing to the next level

Lightweight systems – testing to the next level Once you start testing you is realise there is more testing to do. The testing aimed to push the limits of the belay for the lightweight rescue system. We decided on a 1.5m drop on 3m of rope with a 200kg load. Back in 2017, we did […]

The American Death Triangle in the real world

The American Death Triangle in the real world

The American Death Triangle in the real world Recently (Feb 2018) I wrote a blog on the forces involved in the American Death Triangle. I questioned if there were some occasions we can use this style of rigging. Note: I would recommend reading this first article before diving into this one: American Death Triangle and […]

Mechanical rescue belay for 10mm rope?

Mechanical rescue belay for 10mm rope?

Mechanical rescue belay for 10mm rope? Putting two belay devices with assisted braking through their paces We tested rescue belays (belay devices with assisted braking) as they would function as part of a two-rope system for lightweight back-country rescue. Out in the real world of the backcountry, you often don’t have dry clean conditions. So […]

How effective is a friction device in front of Tandem Prusiks?

How effective is a friction device in front of Tandem Prusiks?

How effective is a friction device in front of Tandem Prusiks? Back in 2002, yes that’s over 15 years ago, we started putting a friction device in front of Tandem Prusiks (pretension) in the backup belay line as part of a two rope system for Mountain Rescue. We attached a 1m sling in front of […]