CMC MPD ~ Two Rope Offset ~ TTRS The MPD allows you to go from lowering to raising without changing hardware. More than nine years of research and development went into the patented Multi-Purpose Device (MPD), which features major innovations in advanced technical hardware for rope rescue professionals. The MPD’s high-efficiency pulley, with an integral […]
CMC MPD ~ Two Rope Offset ~ TTRS Read More »
Marginal anchors in theory create a force out of many, but how should we present this diverse and sometimes controversial concept of anchor construction? This is an introduction to multiple back-ties and projecting the power of substantial anchors to a single focal point. Marginal anchors are generally considered independent anchors points that would not support
Marginal Anchors | Anchor Considerations in Rope Rigging Systems Vol. 2 Read More »
Excerpt from Knots & Pulleys in Rope Rigging Systems Vol. 1 Segment 7 Let’s continue with our discussion on pulley systems. We can look at what we have right here. You can see the Vortex and we have a sandbag as a weight right now. What we have here in the way of a
Staggered Anchors: Progression from 3:1 to 9:1 Simple Mechanical Advantage Read More »
Rock Exotica’s Omni-Block swivel pulleys combine a swivel with a pulley in a patented design that saves vertical height and lets you remove and install the rope while keeping the pulley attached to the anchor. These patented devices revolutionized pulley use when they were introduced in 2005. The Omni-Block combines a pulley with a swivel
There can be a big difference between the theoretical efficiency of a pulley system and its actual efficiency. Here are test results from the Petzl lab. 1. Efficiency depending on the device used at the head of the system. The force required to raise a 100 kg mass was tested under several configurations with different
Pulley system efficiency tests with Petzl Maestro, I’d S, Pro Traxion and RollClip Read More »
Over the last year or so I have been trying to up my rigging game with the main focus being “rigging light, rigging quick, rigging solid and rigging efficient”. I will be the first to admit that all for all of this to happen at the same time it is a special day. I will
From Rigging Lab Academy Course Mechanical Advantage Theory There are three categories of mechanical advantages using pulleys: Simple, Compound, and Complex. Simple MA: A Simple MA consists of a pulley system that has a single haul connection between the load and the haul team. Compound MA: A Compound MA is a simple mechanical advantage system pulling on the haul line
5 Rules to Help Determine Simple & Compound Mechanical Advantage Systems Read More »
Hey all, I wanted to give a quick run down of some niche comparisons. Most pulley manufactures today make amazing gear. When I say most, I mean those within the centric conformity of standards, safety and accountability. We’ll be looking at CMC, Rock Exotica, and Petzl … and then, only a niched down subset of
A Quick Pulley Comparison… They All Rock! Read More »
What has happened… a worker has fallen from his working platform. The worker condition is good enough where he is able to assist in his own recovery and rescue. This video was developed over a span of time where Rich took to heart, the process of confined space rescue, fallen worker rescue and simply using
Using the Fast Fours for Confined Space Rescue and Fallen Worker Rescue/Recovery Read More »
I wanted to talk a bit about a tool that I know for a fact, not enough people are aware of. The Jag System from Petzl. I happened upon this quick tech tip from Petzl and noticed 4 people in the system. Does it or should it really take 4 people to do a raise/lower
Litter Hauling Techniques: A Little A Goes a Long Way Read More »
