How to top belay 2 climbers at the same time on multi-pitch climb?
Senario: I am leading the climb with 2 ropes. I reach at the first pitch. I put myself on the self anchor and built a master point. Now I want to top belay 2 climbers at the same time. They both will be climbing with approximately 15-20 feet of distance between them.
I know how to top belay 2 climbers simultaneously with the following ATC:
Link
the ATC-Guide features a lightweight design, two friction modes and an auto-blocking guide mode that lets you belay a seconding climber off the anchor.
But I don't have this ATC with me. I have this one:
Link
I wanted to know if I can give a simul--top belay to 2 climbers using the ATC shown above?
And is it safe to do it?
If not can anyone suggest me a another time efficient way of climbing a multi-pitch route with 3 people in a team?
Equipment that I have includes ATC, 2 Ropes, 20-Quick Draws (sport route), slings and cordelette.
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One thing you don't want to do is hang the ATC from an anchor by its wire loop and provide a belay from above. This method is a poor one because the braking position would require the brake strand to go upward. But that's awkward and contrary to what people have in their muscle memory. (A workaround for this problem is to redirect the brake strand through a carabiner.)
Auto-locking would be generally impossible with this device, at least as far as I know. While there might be ways of achieving that, I have not found any, and would strongly discourage any experimentation.
Belaying via your body and e.g. dummy runners might be possible, but I haven't found any mention of this in the DAV (german alpine club) brochures that I've read so far, only some forum threads talking about it. The gist seems to be that it's not a good idea since one of the followers falling might draw you into the anchor point, leading to a loss of control
TL;DR: An ATC Guide would be a really good investment for your (and your partners') safety, don't try anything you might regret.
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Simple answer is the same way you would belay one climber. The two should climb simultaneously with the second tied in to a loop (Alpine Butterfly) about 5-10 meters above the third. If the difficulty is such the a fall is more than a remote possibility for either of the following climbers, or simultaneous climbing maintaining same separation is too difficult, they should not be belayed together and should climb separately. Simultaneous climbing is not for everyone, it adds difficultly and requires constant communication. Recovery from a fall is often a lot more difficult.
By trying to jury rig a special case for a relatively (I hope) rarely used scenario, you are creating plenty opportunities for incorrect rigging. The rope management problems that could come from two climbers moving at different rates at different times, along with the need to lock off of the correct strand all make it what I would consider and unsafe set up (However, I personally believe any auto-locking set up unreliable and should only be used as a last resort or backup, never relied on as the primary safety measure)
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1) Is it possible to belay 2 climbers using the picture-2 ATC
I think It would be as possible as belaying one leader using double ropes. You would need to take in slack at different rates, as apposed to give it out and prepare to hold a fall with either rope. (in case it isn't obvious) You would belay from your rope loop/belay loop instead of off the anchor as there is no 'guide mode'.
Where you would run into trouble would not being able to take in slack for one second while holding the fall of the other. For this reason I would avoid doing so.
One alternative is for the first second to trail a rope and instead of cleaning the route unclipping to pass protection, then clipping the trailing rope back in for the second-second(third?) to clean/be protected.
2) Is it possible to achieve an auto locking effect while belaying..
Not with out impairing use of the belay device. So no.
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It's possible, even feasible, and I'll explain how to do so further down. I'd like first suggest that in the absence of a guide mode loop on your belay tube, your likely going to be better of using another system like the auto-locking Italian hitch, than using your ATC XP or similar.
Read here for more information on locking Italian Hitch: http://www.climbing.com/skill/munter-magic/
That said, you could still do it by extending your belay station. Here's how:
- Once you've finished constructing an anchor, clip your followers rope(s) through your master point.
- Lower yourself a certain amount to a comfortable belay spot, say 10 or more feet to a ledge / edge, or just hanging if needed.
- Belay from your harness like you normally would on the ground, using the strand(s) of rope that are now redirected through the anchor above you.
Note: If there is a weight differential, you may want to anchor yourself down using a tree, slcd or other piece of gear, just like you would want to if belay at the ground.
I have employed this system myself in certain scenarios, mostly topping out on blocky terrain, where you are slightly less worried about your second falling, but are concerned about lack of visibility or communications. As the probability of falling increases though, so should your inclination to belay directly from an anchor. > It simplifies things a lot should you have to do any self-rescue for your group.
Update: There are several ways to make a belay locking and I'd encourage you to read the following book if the topic is of interest to you: http://www.mountaineersbooks.org/Climbing-Self-Rescue-P262.aspx. For the sake of inclusion though, here is one method that most people should already know. Any type of grabbing hitch tied to the brake side of the rope, mostly commonly used when belaying yourself (rappelling), but you could can certainly use it to belay somebody else also.
(source: mountain-guiding.com)
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