A better Load Releasable Hitch (LRH)?



Source: Rope Rescue in 2008 - Bay Area Search & Rescue - San Francisco, CA
                                                   Rigging for Rescue - British Columbia, Canada
   
Contributed by: Marty Comiskey ( martycomiskey@yahoo.com)
  

Best useful for:   Top rope     Trad  x       Mountaineering x
                            Sport           Ice             Other (list) Rescue scenarios


Description: There are many ways to build a Load Releasable Hitch (LRH). Probably, the two methods most familar to and utilized by climbers are the Munter/Mule and the Mariner's knot.

The professional rescue community has concerns that go beyond most climber's needs (and they certainly have more gear than we carry), but they advocate using a LRH that might prove handy for climbers in certain situations.


Rigging for Rescue tested 31 variations of 11 different Load Releasable Hitches, and the one they recommend is the Radium Load Releasable Hitch. Basically, it still utilizes a Munter/Mule combo put incorporates either a 2:1 or 3:1 pulley system into the LRH. This could prove useful if you were releasing a heavy load and you wanted to have more control while lowing (the mechanical advantage built into the pulley system means less force applied by you in lowering).


The diagram shows a 3:1 Radium set up. A 2:1 would utilize the Knot on the rope clipped into the top biner rather than the lower biner. (the first two diagrams are the more important - the last four diagrams basically show tying off the knot for "hands off" security).



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