How to rap with a gri gri

So I've heard it's very possible to rap with a gri gri over an atc but I can't find anything online that really explains how to do it. Anyone willing to give me a step by step of what to do?

this would be better for someone to show you one on one.  one easily-made mistake could land you in craterville.

just remember one mistake.... and it is a mistake that a beginner is very likely to make....

Ryan Swanson wrote:
First google result

If you are climbing with someone that uses an ATC, you can fix the rope at the top, rap on the grigri, have them untie the knot, and rap as normal.

You can also stay tied in, and self lower through the rings using the opposite side of the rope.  Think TR belay, but you are the belayer and climber.  It is a 2:1 lower.

Apparently I suck at googling then, thanks that really helped!

yer gonna die

Any one mistake in climbing can be deadly, and obviously doing something for the first time there's a higher amount of risk involved. But there's always going to be a first time for everything you do in climbing, and all you can do is be confident in what you are doing and comfortable in what you are doing it on. Which is why I am asking for an explanation so I can be confident in my understanding of how to rap with a gri gri. 

I find "saddle bagging" the other side/long side/brake side of the rope helps me when rapping with the gri gri. It takes a little bit more time at the rap anchor, but keeps everything feeding nice and neatly.

Try and ignore the rudeness here, just make sure you check your rigging by weighting the system before unclipping however you are attached to the anchor. I generally prefer having the Grigri rappeler rap first off of a fixed line, or a simul rap, over the method with a carabiner clipping the rope through the anchor as this method leaves a biner and knot to get caught while you pull the rope

Reminds me of hearing someone at the top of a Shelf route this weekend say they forgot their ATC and then they rapped on their Gri Gri they had on them instead.

Ryan Swanson wrote:
First google result

Some of those reepschnur-with-biner-keeper setups are excellent ways to get a rope stuck, so make sure the pull is clean. I generally use a very simple clove hitch biner block, with instructions shown on most canyon websites. If the anchors are replaceable and intended for lower offs, I'll use that method.

What Ryan said will work, but would be a bit more time consuming if both partners needed to do it.  

Alternately,

Use a reepshnur / biner block.  Easy to do.  Easy to die, I guess.  
Thread rope to middle mark. Tie an overhand on a bight on left strand.  Clip it to right strand, a locker would be a good idea.
Left side is deadly.
Right side is fixed.  Rap on it.
When you are done rapping, pull left side.  FYI, this can make it bit more difficult to pull the rope.  

http://www.traditionalmountaineering.org/FAQ_ReepschnurRappels.htm

Jon Rhoderick wrote: Try and ignore the rudeness here, just make sure you check your rigging by weighting the system before unclipping however you are attached to the anchor. I generally prefer having the Grigri rappeler rap first off of a fixed line, or a simul rap, over the method with a carabiner clipping the rope through the anchor as this method leaves a biner and knot to get caught while you pull the rope.

To the OP: this is good beta right here. The Reepschnur method previously linked works, but you run the risk of accidentally rapping off the wrong side. Sending the first down off a fixed rope means that the rope doesn't have to be threaded through the rings yet, just secured to the anchor. IE: when the first rappeller is descending on a Gri-Gri, the second can thread the rope through the rings, set up their rap and be totally ready to go once the first rappeller is down. 

The self lowering (rappel?) with a grigri is possible, as Swanson sated, but you have to make sure you orientate it correctly and put it on so the release handle is not to the right of the tie in knot. 

How likely is it for the rope to get caught though with the biner and knot method? 

RAP off C with your Gri-Gri 

Keep in mind that it's always a good idea to test systems on low consequence terrain before committing to something that's new to you, especially when you don't have a guide or experienced climber to demonstrate. Practice the set-up and keep clear weight transitions. Weight the rappel device and test your setup before you remove your attachment to the anchor. Hopefully these are reminders but they're worth emphasizing.

For info, since this is somewhat of a beginner question, that's an alpine butterfly knot in the diagram that walmongr posted.

Brooke Silagy wrote: How likely is it for the rope to get caught though with the biner and knot method? 

Depends on the rope and belay/rappel station anchors. If you fear it may, as in just rap rings on hangers, you can use the alternative method or knot. The self lowering is easy and fast.

You just get to and clean the anchor, and with the rope through the anchors you put the grigri on the belay line and lower yourself.

https://www.petzl.com/US/en/Sport/Self-lowering?ProductName=GRIGRI-2

For those who do the biner and rope method, what is your knot of choice on the bight? Because I have heard both alpine butterfly and overhand.

Brooke Silagy wrote: For those who do the biner and rope method, what is your knot of choice on the bight? Because I have heard both alpine butterfly and overhand.

Either one will work.  But, the overhand has at least some area that lies flat much like the euro death knot for joining two ropes, which may make pulling a bit easier.