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

Written By: Lance Piatt

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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 also admit that these “special days” are happening with more and more regularity.  The biggest modification I needed to make was within my own guidelines, principles and SOPs.  I figure that if I am going to be putting my thoughts out there, I have the responsibility of being a trusted source and one with a solid semblance of authority. Right?  The reality is that without either of these, I’d be lying to you about a great many things… I simply choose to not do that to anyone.  That isn’t to say I am without blindsides.

  1. Rigging Light… If I can’t rig from my backpack then it is likely not useful in a majority of cases. Exceptions would be things like AHD setups and large amounts of rope.
  2. Rigging Quick… Someone is injured and doesn’t have all day.  Quick means the segmentation systems (anchor, mainlines, edge, location) in relation to minimizing waste.
  3. Rigging Solid… Bomber is an overused term. Meets the expectations of the job at hand, with the proper margin of error and simply makes sense with all but the rare circumstance accounted for.
  4. Rigging Efficient… Only use what is needed and nothing else.

So let it be known, I am far from having this stuff dialed, but since I have rigged with some of the worlds best riggers I am feeling more and more confident as time goes on and I love sharing what I am finding to be cool, useful and meaningful.

An Inside 9 mechanical advantage system is a misunderstood tool in the rescue rigging world.  It is normally used in the same situations or scenarios as would a Dynamic Fixed Brake (like the Petzl I’d, CMC Clutch or CMC MPD).  So while the raising options for this setup are technically unlimited,  as a Complex MA System, the real gem of this system is found when a “set of fours” such as a Petzl Jag System or Rock Exotica/CMC AZTEK is “ganged”  onto the “inside” of the working line below the change of direction/progress capture device allowing for a rapid changeover from down to up or up to down.

Note… At the time of writing this blog I was short one CMC Clutch.  Once I am back up to full strength, you’ll be seeing a lot more comparisons between the Maestro and the Clutch.

I am super excited at having really efficient tools to run small team operations.  The new CMC Clutch and Petzl Maestro are game changers for me.  The MPD never offered the amplitude of options I was looking for.

 

Some advantages of the Inside 9 over a standard Dynamic Fixed Brake System are:

  • Indefinite Resets meaning very flexible
  • Does not require an additional person to tend the progress capture device
  • Can be added to the system for a fast changeover from lower to a raise.

Other product included in video footage and or images:

  • Petzl I’d  Petzl’s popular ID, short for industrial descender, is quickly becoming a must have for tech rescue and rope access professionals.
  • Petzl Maestro The Petzl MAESTRO is a descender with an integrated progress-capture pulley that is designed to function in technical rescue and maintenance operations.
  • CMC MPD The CMC MPD is the innovative multi-purpose device that allows the user to go from lowering to raising without changing hardware.The CMC MPD is a UL Classified pulley, descent control device and belay device. A high efficiency pulley with an integral rope-grab mechanism optimizes the best of both worlds.
  • CMC Clutch Designed for intuitive, efficient operation, ease of use and optimal control, the versatile CLUTCH is suited to a multitude of rigging operations
  • CMC or Rock Exotica AZTEK   The AZTEK set of fours has over 100 rigging solutions in one bag and follows the foundations of keeping it simple, clean, and effective.
  • Petzl Jag System Haul kit for pickoffs, making a releasable anchor, or tensioning a system, thanks to its 4:1 mechanical advantage and excellent efficiency .

Below are images taken from a Two/Twin Tension Rescue System incorporating an SA Frame Arizona Vortex raising and lowering a single person load.

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Peace on your Days…

Lance

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