knots

All posts tagged knots

Tying a Munter Hitch Around an Object (updated)

Posted by rescue2training on January 19, 2014
Posted in: accident, high angle, knots, Uncategorized. Tagged: , , , , , , , , . Leave a Comment

Something not quite right about this picture… I just can’t put my finger on it, though.

d1ObO0i

Seriously though, if you’ve never thought about the forces generated from a rope system, even something as simple as a Munter hitch… this should be all the warning you’ll ever need. I suspect that the climber was falling and got his finger caught in the hitch while it was slack , only to have it still there when the rope tightened again.

Updated:

Eric Ulner from Ropes that Rescue provided this response via Facebook:

“I use Munter and super Munter all the time in tree work for catching branches/logs to lower away from structures. While rigging the Munter, and BEFORE firing up the chainsaw, I will take up as much slack as possible while leaving the Munter in its “jumped” position. That involves pulling that strand coming out of the standing end’s first turn on the carabiner with one hand while the other pulls the opposite direction on the standing end. I developed a habit for doing this a long time ago, where I use a pinch grip on the 2nd strand with my thumb pressing the rope against the side of my curled forefinger (much like a fist). The thought of this very situation crossed my mind when I was tying off a brittle/dead branch…

So, the position of the finger and the palm down position of the hand says to me that this poor chap was trying to keep the Munter jumped while he took up slack while belaying, but with the mistake of wrapping the finger around the 2nd strand.”

 

I think he correct and in looking closer at the picture, we can see that the carabiner looks like it attached to a belay anchor. The owner of this finger was probably belaying a climber who fell while his finger was in the Munter. Thanks for the insight, Eric!

 

Thanks to Brian Kazmierzakof Firefighter Close Calls for send this in to us. We’re unable to find the origin of this picture and have no idea of the circumstances surrounding it. If you have any info, we’d love to know the particulars.

Debbie Downer

Posted by rescue2training on January 4, 2014
Posted in: accident, firefighting, high angle, rope rescue, technical rescue, Uncategorized. Tagged: , , , , , , , , , , , , , , . Leave a Comment

While I’d love to start the year on a high note, this video of a rope rescue demonstration brought out the Debbie Downer in me. How many rope rescue guys does it take t screw in a light bulb? Answer: 7.  One to screw it in and 6 to point out how he could have done it better and more safely.

 

debbiedowner

With that in mind, I’d like to talk about the video below. There are a few things that jump out at me:

  • Firefighting gear isn’t technical rescue gear. I’d argue you are better off with the increased flexibility of your station uniform. The brim on the back of a firefighting helmet is great at keeping water and junk from falling down the back of your coat at a fire; it’s also great at hanging up on rope, railings, and everything else at a rope call.
  • While there are several examples of a worse edge transition, this one was successful, but had the potential for disaster. The mainline system was run under the fencing and the basket was placed over it. This created the potential for a pretty big drop. A belay line did not appear to be in place until the rescuer climbed over the fence.
  • There was no obvious edge protection for the main line. If the basket had dropped prior to the attachment of the belay line, it would have taken a pretty substantial fall on an unprotected edge.
  • The belay line was not along the same plane as the main line. If the belay line were to be needed, there would have been significant horizontal movement.
  • If using webbing to help lower a basket over the edge, consider wrapping a Munter (Italian) hitch around the railing rather than strong arming it.
  • A high directional would have solved most of these problems. Even just going over the fence would have helped quite a bit.  To reinforce the fence and keep it from collapsing back towards the anchor due to the resultant, a reinforcing strut could be put into place pretty quickly. Like this:

IMG_1403

 

 

There’s a Right Way and a Wrong Way

Posted by rescue2training on December 7, 2013
Posted in: accident, high angle, highline, knots, rope rescue, technical rescue, Uncategorized. Tagged: , , , , , , , , , , , . Leave a Comment

There’s a right way and a wrong way to move somebody over water. Being a rope geek, I think it should always be done with rope. There might be some debate about whether it always the right answer, but I would argue that almost anything would be better than what transpired in the pictures below.

A sick passenger on a cruise liner was being transferred to a smaller boat to be taken to shore for medical treatment. She was placed on stretcher and transferred to the smaller boat while both boats were under way ! 

Things are going along just fine (but just look at the snow and ice on top of the smaller boat):

boat transfer 1

Moments later, rescuer Bob “Butterfingers” Johnson knows that he will never, ever get rid of his nickname. This is the victim taking her unintentional swim test in 27 degree water:

boat transfer 2

Read the lurid details of the incident here:

http://www.dailymail.co.uk/news/article-1378935/Sick-cruise-passenger-dropped-sea-Janet-Richardson-falls-botched-rescue.html

For another option of getting people off of a boat, check out the rope operation called a “Breeches Buoy”. It’s the older brother of the high line and was used  for getting sailors to shore off of ships that had wrecked near the shore. It is basically a high line with all controls for lowering and retrieving the victim based on the shore.

The_Life_Line_1884_Winslow_Homer

Open Enrollment Time!

Posted by rescue2training on June 30, 2013
Posted in: appalachian doortex, firefighting, high angle, highline, knots, rope access, rope rescue, technical rescue, Uncategorized, vortex. Tagged: , , , , , , , , , , , , , , , , , , , . Leave a Comment

Enrollment is now open for our Modern Technologies in Rope Rescue. The class will be held August 24 and 25 at the Lancaster County Public Service Training Center in Lancaster County, PA at a cost of $295 per student.

This class covers multiple versions of the bowline along with some pretty god reasons to consider them, several uses of the AZTEK kit, a thorough introduction to the Two Tension Rope System concept with the MPD, and the use of the Arizona Vortex Artificial High Directional in some pretty typical urban setup configurations as well as some Rescue 2 Training exclusive uses of it in a few of the Appalachian Doortex configurations. As you can see in the pictures below from our last class, we did a good bit of work with the Rock Exotica UFO. One particularly challenging and fun scenario was to change the direction of our main and belay lines 180 degrees on an anchor that was free floating in the middle of the stair landing. There was also some excellent use of the UFO to simplify the rigging of a Two Rope Offset.

In addition to the Arizona Vortex, Appalachian Doortex, MPD’s, UFO’s, and AZTEK’s, we’ll also have available for use in this class three new products (some not even on the market yet) from Rock Exotica:

The little brother of the UFO; the rockStar.

The Enforcer load cell; which features swivels at both ends, a digital readout, and Bluetooth transmitting capabilities!

The AZORP (Arizona Omni Rigging Pod); an add on used to increase the already amazing flexibility of the Arizona Vortex.

open enrollment August 2013

Here are some pictures from our last MTRR class; we did some heavy duty 3D rigging along with some urban AZV usage:

IMG_1408 IMG_1412 IMG_1420 IMG_1429 IMG_1432 IMG_1434 IMG_1393

This class is different each time we run it and we’ve developed new techniques each class with input and ideas from the students. If you’re interested in seeing and helping develop what’s on the cutting edge of rope rescue equipment and techniques, contact Kelly to reserve a spot in this popular class. Call 240-462-6610 or send an email to rescue-2@comcast.net

Atomic Wedgies and Other Urban Vortex Thoughts

Posted by rescue2training on April 1, 2013
Posted in: appalachian doortex, confined space rescue, firefighting, high angle, rope rescue, technical rescue, Uncategorized, vortex. Tagged: , , , , , , , , , , , , , , , , , , . 9 comments

While the Arizona Vortex is usually thought of as an industrial and wilderness rescue piece of equipment, it’s no secret that I think its full potential as a tool for the urban rescuer has not been fully explored. With that in mind, we are constantly trying (occasionally failing) to find out how to best use this tool to our advantage.  We’ve been working on different configurations of the Appalachian Wedge Pole (AWP) lately.

The first and perhaps the most useful version of the Wedge Pole is used to create anchors in a hallway where others might not exist. While no permanent name has been found yet, and because it appears to be bombproof, we’ve been calling it the Atomic Wedge Pole. Or Atomic Wedgie for short. As in: “Hey give him an Atomic Wedgie quickly, so we can get on with this rope rescue. ”  But again, no permanent name yet.

Below are some pictures we took during the discovery phase of these anchors, a scale model so to speak. They were loaded with a couple of guys giving it all they had, leaning into the load line. It was an initial test to see if the anchors would move at all. The next step in the process will be to load these with a one person load and operate a raising and lowering system. Then on to a two person load.

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A slightly more complex version that allows for a longer haul field that runs toward the edge.

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2 to 1 Wedgie

Some techniques might be setups in search of an application, the picture below being one such example. I envision using this above a hole in a hallway, where there are no other anchors present. This might be more of an industrial confined space setup, but it’s neat to see in action.

IMG_1334

These pictures above are of urban usage, but we developed the technique out on the rocks. Here are two pictures of the first AWP setups, one horizontal and one vertical, from when the idea first struck.

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This last picture comes to us from the men of Group 2 on Rescue 1 with the Boston Fire Department. They constructed an Appalachian Lean-To and changed the direction of the haul line 90 degrees at the head resting on the floor. To counteract the resultant force that wants to lift the left leg away from the wall, they front tied the setup to an anchor spanning the doorway with two AZTEKs, one of which is doing the job of keeping that left leg in compression when it naturally wants to pull away from the wall because of the COD on the head. Good job guys!

sandy lasa

Highline Failure w/Video

Posted by rescue2training on December 1, 2012
Posted in: high angle, rope rescue, technical rescue, Uncategorized. Tagged: , , , , , , , , , , . Leave a Comment

This dramatic highline failure in Lima, Peru looks like somebody tried to go bungee jumping while attached to a Stokes basket loaded with a (previously) uninjured victim.

A couple of points to note:

Just before the track line snaps, you can see the carriage kind of “chugging” along down the line, indicating that something is binding up somewhere. One thought is that the control line used to lower the rescue package down the trackline is on the downhill side of the carriage, which would cause the side cheeks of the pulley to dig into the rope until there was enough force to cause the pulley to move down the rope a bit before binding up again. Hence the chugging motion.

The tension on the trackline seems to be way too tight. While it is a sloping highline, there seems to be very little sag, which would indicate that the trackline was too tight and easily susceptible to being cut by something…like, say, a pulley that is loaded sideways.

There is no horizontal control line on the downhill side. When the basket falls, there is a substantial fall distance as well as one hell of a swing fall at the bottom of the ride. When the basket reaches the bottom of its arc, it starts to swing back up again, only to be stopped by  the second floor walkway, which I’m sure did quite a number on the rope.

Had there been a lower horizontal control line, the total fall distance would most likely have been less, and the swing fall most certainly would have been all but eliminated.

Despite all of those things, the system still kept the load from hitting the ground. Not a ringing endorsement, but it does give you an idea of strong our equipment actually is.

I’d seen this video before, but Matt Hunt from Sterling Rope passed along a facebook link to it that caused me to search for a linkable version of it. Thanks for bringing it back to the forefront, Matt.

And just for kicks, here is a dramatic presentation of what happens when there is not enough sag in the system between your anchors. It’s a good showing of the load pulling the anchors towards each other:

anchor failure

Knots Found on Mars!

Posted by rescue2training on September 8, 2012
Posted in: knots, rope rescue, Uncategorized. Tagged: , , , , . Leave a Comment

The Mars Rover “Curiosity”  has photographic evidence that even on Mars you can find evidence of the superiority of finely tied knots. Of course, the picture is of the Rover taking a picture of its own wiring harness. But it is still cool to know that despite all of the superiority of modern technology, that it still comes down to a clove hitch to keep a wiring harness bundled together countless miles from home. Members of the International Guild of Knot Tyers (IGKT) have defined exactly what kind of knots are used.

Whoa, wait. There is a GUILD for people who tie knots? Yes. Yes there is, here is their website:

http://www.igkt.net/

I was actually a member for a couple of years. I like rope; these people LOVE rope. You might even say they want to marry it, which any good member, past or previous, of the IGKT knows is actually called a bend. OK you can boo now.

My bad attempt at humor finished, here is a link to the story. Thanks to Joe Fefe of Winchester Sprinkler for knowing that if there was such a thing as the IGKT, I must surely have been a member and for passing this story on:

http://news.yahoo.com/ancient-knots-keep-mars-rovers-laces-tied-red-141541222.html

Bowline=Death?

Posted by rescue2training on September 3, 2012
Posted in: high angle, rope access, rope rescue, Uncategorized. Tagged: , , , , , , , , , . 1 comment

Can a bowline with a Yosemite finish be a recipe for disaster? According to the video below  the answer is a resounding yes. That is, of course, if you are prone to loosely and incorrectly tying and dressing your knots. I think there are quite a few knots that would come undone given those set of circumstances. You can read  about the inspiration for this posting of mine at these two climbing forums:

Rockclimbing.com

Supertopo.com

Does this mean that it is a bad knot? I would argue that it is (k)not. It could be argued that it might not be the best thing to use as a harness tie in for people who are only using it for climbing. But to argue that one usage against the effectiveness and efficiency of the many variations of this knot when used for rescue, seems a like it might be limiting yourself. For instance, you can tie on bowline on the bight with a Yosemite to create a quick rope anchor, around a tree for example, with a bight to be used for connecting your friction device to; or use a Portuguese bowline to anchor an A frame as shown in the last video. I would(k)not discount a whole series of knots just because one variation of it does not fit one specific use. I might be preaching to the choir, but I still wanted to get it out there. Please feel free to leave a comment if you have any thoughts on the matter.

Here is the first video of how not to tie a bowline with a Yosemite

Here is are two video sfrom R2T friend Eric Campbell. One on how to tie a “snap bowline” with a properly tied Yosemite and the other, a couple of bowline variations for anchoring

Lastly, you can see in this video, around the :17 mark, a Portuguese bowline (with a bight and Yosemite) used to anchor the A Frame and create a rearward facing bight to attach the 3:1 tensioning system to. To do this with a family of 8 knots would take forever, not be nearly as clean, and is sure to eat up a ton of rope.