Kootenay Highlines: Horizontal English Reeve w/ Dual Track Lines & a Single Carriage
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- Опубликовано: 17 окт 2024
- Whether or not to use a bypass system or shock absorbers between the two control lines & the carriage is rigger's choice. If electing to use the shock absorbers, it's also dealer's choice whether or not to jump the terminal ends of the control lines into the carriage. If you're concerned with a possibility of a "more than desired" extension on the 'SORBER deployment and don't want to lose too much sag during the arrest then by all means put a jumper in. How long of a jumper is up to you... the 'SORBER 20 has a maximum deployment distance of about 4 feet.
A smooth & efficient movement of the load along the track line will depend on the following factors:
1. Effective coordination between the near & far side control line operators.
2. Where the load is in relation to the mid-point of the span/cord, and whether it is getting further away from or closer to it.
3. What the catenary angle of the track line is (how much sag is present).
I stated that if the load is moving toward the near side, then the far side control line operator should let out completely on the MAESTRO. That was a generality and should be done "within reason" in order to control the speed and the slack within the control line. Based on the factors mentioned above, the control line operator may need to provide some back-tension if the load is closer to the far side and has not yet reached the span's mid-point.
Tyrolean Traverse = Moving along the track line under self-power (Slacklining, Tightroping, Commando crawling, etc.).
Highline = A rope system is pulling an object along the track line.
Kootenay Highline = One that is rigged according to a strict set of rigging principles intended to maximize safety & redundancy.
BY ANGLE: Horizontal vs. Sloping vs. Steep
BY FUNCTION: Simple Transport vs. Drooping vs. Reeving (English or Norwegian)
BY STRENGTH/SAG: Single Track vs. Dual Track vs. Multi-Track
Single Carriage vs. Dual Carriage
Continuous Control Line vs. Separate Control Lines
Can you safely tension the track line(s) & associated components beyond a 10:1 static system safety factor? Yes you can & quite frankly you often do whether you realize it or not. The 10:1 was derived from the impact forces on a belay system associated w/ arresting a failure of the main suspension. A track line and its tensioning system do not have the potential to see impact forces; it is not a belay system. At worst, the track line may experience minor oscillations of bounce, but these forces pale in comparison to an arresting force. Therefore you don't have to strictly adhere to the Kootenay Principles when building the track line system; a 5:1 safety factor may be more reasonable if desired. The control line system however should absolutely be rigged with a 10:1 static safety factor.
Hello Bob I am a rescue tech from Trinidad and Tobago. Thank you for your knowledge and especially your technical details.keep up the good work
Thanks for watching!
Hello. How fortunate we are to be able to review in detail this system and its particular settings with such closeness. Big thank you!
Glad it was helpful!
Incredible! How does anyone or even a fire department amass that much equipment? I am a retired firefighter/paramedic and avid rope access guy ant I must tell you - I am impressed with your rigging skills! I will be watching your videos over and over for years trying to absorb everything you’ve shown. Keep them coming although I don’t know how you could top this one --
Thanks, glad you enjoyed it!
Great learning. Thanks! Have you watched the Rescue 3 videos of pull testing stacked rig plates? As well, you're not worried about the rescucenders shredding the anchor strands if they take a hit?
I’m not sure if I have, but I’m aware that stacking rigging plates is overkill, & thus I’d call it a “novice” tactic… but the ones I used in this video were so thin that I don’t think it had any negative effect on the connectors. As far as the rescucenders go, I’m not worried at all because they are not part of any belay anchor system. Therefore they do not have the potential to see impact forces. The anchors for the control lines do have that potential & therefore I do not use rescucenders here, rather Maestros & ASAP’SORBERs.
@@Propeller_Head Thanks for the reply buddy. Appreciate it.
If your tension lines fail, can that a-frame guyed to them fold down?
Depends on where the failure occurs, & the extent of the failure… as well as how they’re anchored. If any one track line were to fail, then there’s still the other intact track line, so the A-frame would not topple in that case. If both track lines were to fail from the far side, & the A-frame resultant was erred forward of the compression members during the failure, then the A-frame would not topple, assuming the feet were properly secured to the ground. However if the resultant force at the head of the A-frame was pointing behind the compression members then a failure of the far side would cause the A-frame to topple. Same scenario but in reverse for a near-side system failure.
Hello Bob :). first of all, thanck you for your amazing video! And I have a question! is the reason for using a kootenay pulley to make 100% use of the tension of the rope?
No problem. The pulleys act as trees or bollards, allowing the rope to retain its full strength so that the knot is under little to no tension.
@@Propeller_Head thank you so much :) !!!
I see that you have the blue control line and the red reeve line is anchored to the vortex inner and outer leg with a azorp. 18:20 I have tried to locate what the sheer force capacity of either the inner or outer vortex leg but have been unsuccessful. If you know could you pass that information along. Appreciate all your videos!
Thanks! I'm at a loss, other than to assume that it's at least 36kN per specs.