3:1 Up Haul or Z Rig
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- Опубліковано 9 лип 2011
- This video was created as a tool to assist my students with knot tying instruction for a rope rescue class I teach to my local Fire and EMS organizations. These videos are intended only as a teaching aid to my students. These videos alone are not enough instruction to engage in the activity of climbing or rope rescue. Please do not engage in these activities unless properly trained. The methods taught in these videos are the way my team does things and will vary with other rescue teams.
Disclaimer: Any activity that involves ropes is potentially hazardous. Lives may be at risk - possibly your own. Considerable attention and effort have been made to ensure that these descriptions are accurate. However, many critical factors cannot be controlled, including: the choice of materials; the age, size, and condition of ropes; and the accuracy with which these descriptions have been followed. No responsibility is accepted for incidents arising from the use of this material.
Oh good lord the negative comments! It's not an advanced learning video! It's a short simple picture of the basics of a z-rig!!!
For those unclear this is just a haul rig meant to be attached using those prussiks to a haul line on another system. The progress capture for the load would be done with the other system.
very good video, thank you. I'm trying to learn too set up a small simple 3 to 1 pulley that can attach to the ceiling to a eye hook or to a wall that has a fence on it. The purpose is to recline m wheelchair and with my arms use the pulley to move my legs up and down to get some movement and range of motion. I have tried this with a regular exercise pulley and it does work but 3 to 1 would be more sufficient. Is there a read made 3 to 1 that you can recommend that I could purchase? Thank you for your help.
FYI... would be helpful to show attaching prusiks to the system.... otherwise great method to set up small.
J Frost - MA
what about the progress saver prusik?
34 years of climbing/rescue but still learning.
Need at least one prusik at the anchor to secure load strand during the raise !
Double pulley at top allows haul team to spread out across fall line rather than bunch up at cliff edge.
Highly recommend a Radium Release Hitch between anchor and top pulley in case rig jams or malfunctions, etc.
Also, back off a quarter turn when locking carabiners.
Second the "different" comment and endorse the aluminum carabiner comment.
A lot of good points. One thing, this setup is off of the main line, so the progress capture would be on that main line. So there should be no need for progress capturing in the 3 to 1 itself. Also, probably wouldn't need a load release because of where the progress is captured you should be able to slack this system enough to fix any problems. Just my thoughts.
How come the prusik isn't by the anchor to prevent the rope from slipping back? This looks incorrect but I'm no expert..... any help guys?
no progress capture device?
i like how you set up the system but where is your safety, prusiks as breaks. you used prusik minding pulleys as breaks why not put a safety in it?
Rather different from what I was taught, but looks like you guys have different SOG's. Interesting and honestly a rather confusing set-up. Not my preferred systen, but I'm sure it will work. Personal fan of having them simple enough that they don't take large amounts of time to set-up but enough hardware to make it safe. Last thing some people have a big thing about using only steel on steel hardware, in other words what appeared to be your aluminum pulleys should aluminum 'biners not steel
Mkay
oke up sir 🙏
A double pulley on the anchor would not be better. Using a double pulley on the anchor side would only be useful if you wanted to change the direction of pull for the the haul team. Fixed pulleys create direction change only, for a pulley to create mechanical advantage it must be a moving pulley. If you added another pulley to the load side it would increase the mechanical advantage and it would no longer be a 3:1 but likely a 5:1.
Why use the prussiks to attach to the load? Prussiks are the weakest link in that entire system. Lowest breaking strength. We used prussiks as breaks.
Mmkay
It doesn't look safe at all. Where's your safeties if the load should fail? I don't see any Munter Knots. You didn't rig up the prusik up properly to act as a break.
+John Athanassion
1. Its a munter hitch. Not a knot. and it has no place in a haul system, only a belay system and even there its a poor choice
2. This system appears to be set up as a piggyback system to the haul line so it does not require a safety (prussik). The main line will have that. If your using this to haul on its own then absolutely you need it.
What the hell is that noise?
mmkay
That's a figure 9 mate not 8
I am just a novice but doesn't the fact that the bottom pulley and the end of the rope are both attached to D ring which is then attached to the load eliminate the need for a separate rope grab?
should be set up with a rig or stop, otherwise personnel become part of the system & cannot walk away to assist elsewhere. no offense I hope
Its just a basic 3:1 and not an actual Z RIG,.......
wheres positive capture? but ok lmao
Mr Mackey has been found 🤣
A safety knot on a figure-eight is about the most pointless redundancy I've ever seen. NOT required by most AHJs in Rope Access and in the Fire Service. Not sure why you and a lot of others do that. It doesn't make any sense.
I have been taught to tie it for good practice in an all out emergency (night decent and no torch). With the knot if you re-threaded the figure of eight wrong it is still less likely to fail. However, if you are confident you can tie a double figure of eight and you have a carabiner then it is pointless
Not helpful. No conclusion and I simply could not help but be distracted by the 1,307 "okays" used over the duration. Plz take a public speaking course. It will help.
+Cafeducati Perhaps you should make a video
+Cafeducati He doesn't even say okay a lot. Anyways what's important is the information. Seems like you're projecting some frustration.