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jensk
Nov 3, 2008, 8:46 PM
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I know Petzl has an offical size designation for minimum diameter but.....honestly, how skinny a rope can you really get away with (safely) belaying on a grigri?
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jdefazio
Nov 3, 2008, 8:57 PM
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jensk wrote: I know Petzl has an offical size designation for minimum diameter ...
^^^
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jermanimal
Nov 3, 2008, 8:58 PM
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I use with 9.8 just fine.
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angry
Nov 3, 2008, 9:04 PM
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I've rappelled with an 8mm with a grigri. It sucks, you've got to pay way more attention than you would with a regular device.
I frequently use mine down to 9.2-9.4 and it's fine. It doesn't lock quite as instantly but since I use mine with the break hand on, it works well.
Those skinny ropes are skinny and you can bumble the rope easier. I'd strongly recommend something with an "assist" like a grigri or a cinch with anything smaller than 9.6 or so unless using them in tandem (twins, half).
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chossmonkey
Nov 3, 2008, 11:26 PM
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Belay gloves aren't a bad idea when using skinny lines either. Even with a "locking" device.
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clc
Nov 4, 2008, 12:05 AM
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I've rappelled on 8mm just fine. and used the mammut serenity 8.9mm rope. just belay properly. even and atc with and 8mm is trickier
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kennoyce
Nov 4, 2008, 12:13 AM
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exactly. You can use any rope size that you would like, just make sure to keep the brake hand on and don't expect the grigri to do the work for you. as with any belay device, the skinnier the rope the harder to brake, but having a grigri will make it somewhat easier than a normal tube style device.
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stashyboy
Nov 4, 2008, 12:55 AM
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My understanding is that Petzl officially sets 9.8 as a minimum to use the device safely, even though it is stamped 10mm min. on the current devices (this will change soon) Of course many slightly smaller ropes may work, esp. if they are used/dirty/fuzzy, etc. your mileage may vary, but don't assume anything under their recommendation will lock up automatically.
-M
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hafilax
Nov 4, 2008, 1:03 AM
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Do people redirect through a biner on the leg loop for more control on the lowers like directed for the cinch?
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lidosis
Nov 4, 2008, 1:14 AM
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I've used the gri-gri with the beal joker. With a fall it locks fine, and feeds really easy. You just have to use it like you would any other belay device, you know with a brake hand. I think people miss the brake hand sometimes.
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thabadcharacter
Nov 4, 2008, 1:19 AM
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I've rapped a 7mm zip line on lower outs, using a redirect off the leg loop. A little slippery, but when would you belay with a single 7mm cord? Never. Sounds like people have been using 8.9s and low 9s with no problems, and that is realistically as low as you would probably go with a single rope.
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rtwilli4
Nov 4, 2008, 3:18 AM
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9.1 works fine as long as you belay correctly.
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USnavy
Nov 4, 2008, 4:30 AM
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stashyboy wrote: My understanding is that Petzl officially sets 9.8 as a minimum to use the device safely, even though it is stamped 10mm min. on the current devices (this will change soon) Of course many slightly smaller ropes may work, esp. if they are used/dirty/fuzzy, etc. your mileage may vary, but don't assume anything under their recommendation will lock up automatically. -M
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Zsublime.ph03nix
Nov 4, 2008, 9:22 AM
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Registered: May 3, 2007
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USnavy wrote: stashyboy wrote: My understanding is that Petzl officially sets 9.8 as a minimum to use the device safely, even though it is stamped 10mm min. on the current devices (this will change soon) Of course many slightly smaller ropes may work, esp. if they are used/dirty/fuzzy, etc. your mileage may vary, but don't assume anything under their recommendation will lock up automatically. -M Your understanding is wrong. They state 9.5.
I believe your understanding is wrong.
In reply to: Technical specifications For use on single ropes from 10-11 mm Weight: 225 g Colors: D14: gray D14 R: red / burgundy D14 B: blue CE Aluminum side plates Stainless steel cam and friction plate Reinforced nylon lever arm.
http://en.petzl.com/petzl/SportProduits?Produit=203
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sspssp
Nov 4, 2008, 11:00 PM
Post #15 of 18
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Registered: Jan 2, 2003
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jensk wrote: I know Petzl has an offical size designation for minimum diameter but.....honestly, how skinny a rope can you really get away with (safely) belaying on a grigri?
It depends a bit on how fuzzy/slick the rope is, but 8.8~9.1 isn't bad with a grigri. However, you have to treat it like an ATC. It is not going to provide the locking function like it would with a 9.5~10.1
The grigri has been on the market forever (in rockclimbing terms) and was designed for yesterday's [fat] dinasour ropes. If you want a locking device for skinnier ropes, switch to the Cinch.
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currupt4130
Nov 5, 2008, 12:25 AM
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Registered: Feb 7, 2008
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Zsublime.ph03nix wrote: USnavy wrote: stashyboy wrote: My understanding is that Petzl officially sets 9.8 as a minimum to use the device safely, even though it is stamped 10mm min. on the current devices (this will change soon) Of course many slightly smaller ropes may work, esp. if they are used/dirty/fuzzy, etc. your mileage may vary, but don't assume anything under their recommendation will lock up automatically. -M Your understanding is wrong. They state 9.5. I believe your understanding is wrong. In reply to: Technical specifications For use on single ropes from 10-11 mm Weight: 225 g Colors: D14: gray D14 R: red / burgundy D14 B: blue CE Aluminum side plates Stainless steel cam and friction plate Reinforced nylon lever arm. http://en.petzl.com/petzl/SportProduits?Produit=203
I believe you're wrong as well. Straight off the instruction tag.
Instructions for use
This product is a belay device for
the leader or second on a rope.
It has been developed for indoor
wall climbing or for climbing
on well-protected sport routes
where anchors meet the UIAA
standard. It should not be used
for mountaineering or adventure
climbing. It is designed to be used
with a UIAA dynamic single rope,
10-11 mm in diameter (9.7 mm
is acceptable). However, extreme
CAUTION should be exercised
if using a rope that is less than
10 mm in diameter because the
human hand cannot effectively
grip a thin rope, particularly while
rapelling or lowering. The use of
static or semi-static ropes is limited
to rappelling and top-roping. The
user must receive specifi c training
and always remain alert.
http://en.petzl.com/ProduitsServices/GRIGRI_D14601-I.pdf
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hafilax
Nov 5, 2008, 12:33 AM
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Registered: Dec 12, 2007
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If you're worried about it get a Cinch. It's rated down to 9.4mm.
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Zsublime.ph03nix
Nov 5, 2008, 12:46 AM
Post #18 of 18
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Registered: May 3, 2007
Posts: 15
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well...guess we're all wrong then :)
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