CMC PROSWIVEL™ PULLEYS Strong, versatile, and ergonomic pulleys are at the foundation of efficient rope systems for rescue and work at height. Expanding on the original patented swivel pulley line by Rock Exotica, the CMC ProSwivel Pulleys are time-tested and brought to you by two companies committed to quality and service. Each pulley is certified …
Excerpt from Gear In Use 2: Techncial Rescue All maneuvers must be done on two independent rope systems. These two systems can work in parallel (two haul lines) or separately (work rope and belay rope). Gear Within This Learning Lesson Petzl Maestro Petzl Jag System Petzl RollClip Petzl Rescucender 1. Examples of hauling with …
Mechanical Advantage Overview Mechanical Advantage is a measure of the force multiplication achieved by using a tool. In most cases, this involves using pulleys, but that isn’t always the case. The purpose is to show how we can achieve more work with less people AND that sometimes having more people can actually be dangerous. An …
A mechanical advantage haul system reduces the effort required to raise a load. The mechanical advantage obtained is based on the pulley effect. 1. The Pulley Effect If we consider a load suspended on a rope, the rope passing through a pulley above the user, with the user’s hand holding the rope on the …
How To Calculate Mechanical Advantage with Petzl Gear 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 …
(This article was originally run in Firehouse October 1, 2019) Russell McCullar clarifies whether 15:1 is still relevant and says that fire departments should select gear and load limits that meet their needs. All Photos by Russell McCullar Not long ago, I was explaining to one of my students that our training agency was undergoing …
Meet The Players… The AZTEK Elite and the Pocket Hauler. Compact pulley systems have been in use for a long time, but the AZTEK in its current version is really what is known best. The original version (AZTEK Pro), is Sterling’s Pocket Hauler, includes these mini double pulleys and had a progress capture prusik at …
The Differences and Similarities of the AZTEK Elite and Pocket Hauler Read More »
Determining mechanical advantage using the T-Method is really the guiding method to determine the “ideal mechanical advantage” or IMA. However, note… this method doesn’t take into consideration the friction problems or coefficient of rope bending or turning on metal. So what is mechanical advantage? Mechanical Advantage Definition 1 “A force created through mechanical means including, …
Go 0 to 60 In Your Understanding of Mechanical Advantage Read More »
In certain cases of extreme urgency requiring a very rapid response, the rescuer can access the victim by descending on one rope. Once the emergency has been addressed, upward evacuation can be secured with two strands of rope. WARNING: before using this technique, make sure to minimize the risk of rub points or rockfall …
Drop loop haul on the Petzl I’D for urgent rescue, with Petzl ASAP Read More »
The following information is meant only as an informational introduction to the loveable jigger system. An Introduction to Jiggers Generally, these beauties are considered pre-rigged pulley systems used mainly for hauling, but can be very important in lowering heavy loads as well. The advantage of these systems is in their rapid deployment, and straightforward operation …
