Mainline Systems and Operations

Petzl Maestro – An Amazing Tool For Technical Rescue Operations

PETZL MAESTRO (Small and Large) is a descender designed for technical rescue operations. It facilitates the manipulation of heavy loads, for lowering or hauling, and may be used in both the primary system or in a back-up belay. This versatility allows rescuers to adapt to any situation they may encounter on the rescue scene. The …

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The Gear Used In Artificial Highlines and Two Tension Rope Systems

Ultimate – the best achievable or imaginable of its kind. Can we have The Ultimate Gear List for anything?  Probably not, but we can put some thought into what that might look like. Before we get to the list, let us outline where this gear cache came from. In building this course with Jason Ilowite …

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PETZL MAESTRO features

The MAESTRO combines the abilities of a progress-capture pulley and a descender for effective hauling, releasing and lowering of the load. The AUTO-LOCK system locks the load automatically and returns the handle to the stop position.   Let’s start with a Petzl Maestro Overview! 1. Working principle The MAESTRO uses a pulley mounted on a …

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Comparison between Petzl MAESTRO and PETZL I’D for a rescue using twin tensioned haul lines

MAESTRO and I’D allow for efficient hauling, releasing the lock at any time and a controlled lower of the load. The two devices have different ergonomics and different specifications (working load and efficiency). Hauling The MAESTRO’s efficiency enables effective use of simple pulley systems. If a complex pulley system is needed to increase efficiency, it …

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How To Calculate Mechanical Advantage

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 …

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Team Rescue Techniques for Hauling and Lowering with Petzl Maestro

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). 1. Examples of hauling with work rope and belay rope. All hauling and positioning forces are concentrated on the work rope. The belay rope is set up and …

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A Little Known Tool That Is Making Huge Headway… The Inside 9 Mechanical Advantage System

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 …

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Technical Rescue: The Importance of 15:1

(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 …

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