Welcome to ArboristSite.com! Log in or Sign up to interact with the ArboristSite community.

ArboristSite.com Sponsors
 
 


  1. Please see this post Click Here Please ask questions if you have them!! I hope this is going to be great for us all.
    Dismiss Notice

GriGri & 13mm

Discussion in 'Recreational Tree Climbing' started by SINGLE-JACK, Nov 23, 2009.

  1. SINGLE-JACK

    SINGLE-JACK ArboristSite Guru

    Joined:
    May 2, 2009
    Messages:
    601
    Likes Received:
    85
    Location:
    USA
    The Petzl GRIGRI is rated for use on 10-11mm rope. Anyone have experience, pro or con, with using a GRIGRI on 13mm (1/2") rope?
     
  2. deevo

    deevo Addicted to ArboristSite

    Joined:
    Sep 25, 2007
    Messages:
    2,171
    Likes Received:
    193
    Location:
    Horseshoe Valley,Ontario,Canada
    If your going to go any larger, then you should go with the I'D. I got that straight from a Petzl rep on a course I was on. I have a gri-gri and a small I'D. I use 11mm blaze and the fly.
     
  3. Job Corps Tree

    Job Corps Tree ArboristSite Operative

    Joined:
    Sep 10, 2007
    Messages:
    438
    Likes Received:
    38
    Location:
    Hot Springs Arkansas
    gre-gre & 13mm

    I have had a gre-gre for about 10 years and it works fine with 1/2 new england Hy Vee and safety blue, we use it for belay in our Spikes training , less mistakes than with a figure 8. some of our job corps students are not to tightly wraped
     
  4. Plasmech

    Plasmech Addicted to ArboristSite

    Joined:
    Dec 13, 2008
    Messages:
    1,164
    Likes Received:
    81
    Location:
    Aston, PA (19014)
    How is descending on a Gri Gri? I've heard it can be rather jerky (?)
     
  5. moss

    moss ArboristSite Guru

    Joined:
    Sep 8, 2005
    Messages:
    952
    Likes Received:
    80
    Location:
    Jamaica Plain, Massachusetts
    Anything over 11mm is like stuffing a sausage into the Grigri. Even New England Ropes Fly (allegedly 11mm) has to squeeze though a Grigri. Tachyon (Lava) is a tight squeeze though a Grigri, it works but is not great. I'm talking about SRT descent not for lanyard use.
    -moss
     
  6. moss

    moss ArboristSite Guru

    Joined:
    Sep 8, 2005
    Messages:
    952
    Likes Received:
    80
    Location:
    Jamaica Plain, Massachusetts
    There's a learning curve, out of the box it's jerky, if you work at you find the sweet spot.
    -moss
     
  7. SINGLE-JACK

    SINGLE-JACK ArboristSite Guru

    Joined:
    May 2, 2009
    Messages:
    601
    Likes Received:
    85
    Location:
    USA
    Yeah, I was fairly sure what kind of answer I would get. I really like the GriGri concept but got big hands and all my ropes are 13mm. I checked out the large "I'd" - it's huge and cost twice as much. The spiderjack is three times as much. Then there's the unicender at $450.

    Still looking for best single mechanical device that will do it all - ascend, descend, & limb walk - probably doesn't exist yet.
     
    Last edited: Nov 25, 2009
  8. moss

    moss ArboristSite Guru

    Joined:
    Sep 8, 2005
    Messages:
    952
    Likes Received:
    80
    Location:
    Jamaica Plain, Massachusetts
    Probably the Unicender is it but the price stops me too. Ya the I'd is a huge chunk of gear. Maybe a rack would be the ticket. it's kind of big too but there are some smaller versions. Everyone who uses them loves them and you can go down fast on them unlike the Grigri or I'D.
    -moss
     
  9. canopyboy

    canopyboy ArboristSite Operative

    Joined:
    Apr 20, 2009
    Messages:
    436
    Likes Received:
    49
    Location:
    Northern VA
    I haven't run anything bigger than Tachyon or Fly through mine, but those seem tight. Definitely can be a bit jerky, like Moss said you need to find the sweet spot. New ropes seem to be a bit more finicky to find that sweet spot on. My old Tachyon actually seems to run the smoothest, even compared to my 3/8 HTP. The sucker does get hot enough to glaze the rope slightly, on what I consider moderate descents over short distances (less than 50'). I've been considering a rack, but I'd have to switch over before descending unlike the RADS system. And of course buy another piece of equipment.....

    :biggrinbounce2:
     
  10. SINGLE-JACK

    SINGLE-JACK ArboristSite Guru

    Joined:
    May 2, 2009
    Messages:
    601
    Likes Received:
    85
    Location:
    USA
    Well ... I managed to borrow a GRIGRI ... tried it (unloaded) with Yale XTC Fire (12-13mm), Yale XTC 12 (12mm) and Sterling HTP (7/16 - 11mm). Sherrill lists the Fire at 13mm but Yale lists it at 12mm.

    Anyway, they all fed through the GRIGRI quite nicely. Since it's raining and the GRIGRI is not mine, I did not climb with it but the 12mm's actually seemed a little better than the 11mm.
     
  11. lostcoastland

    lostcoastland ArboristSite Operative

    Joined:
    May 19, 2008
    Messages:
    196
    Likes Received:
    14
    Location:
    So-Cal
    my 1/2 inch arborplex got flattened out in my gri gri, also sap would lock it up...after i switched to 3/8 " Sterling Snakebite from Sherril...it's smooth....
     
  12. dantiff2

    dantiff2 ArboristSite Lurker

    Joined:
    Jul 9, 2009
    Messages:
    45
    Likes Received:
    5
    Location:
    Saint Thomas PA
    I was considering a rope walking technique DdRT with the Tibloc then found out it too is only rated up to 11mm line......Why? The cam concept should work on any line. Why not make ascenders like these fit 1/2" line?

    Dan
     
  13. davej

    davej ArboristSite Operative

    Joined:
    Jan 15, 2007
    Messages:
    116
    Likes Received:
    4
    Location:
    STL
    When I first heard that Petzl was introducing the "RIG" I thought it might be a GriGri for 13mm -- but no. The "Rig" is just their "professional series" GriGri and only rated up to 11.5mm (0.5mm more than GriGri).
     
  14. treemandan

    treemandan Tree Freak

    Joined:
    Oct 3, 2006
    Messages:
    11,085
    Likes Received:
    481
    Location:
    chester co pa
    The Gri-Gri? That's that little blue thingy with the red handle and some wheely things inside? I knew a guy who would stuff his 16 strand in there and hang off it. He said " It just fits".
    Now I was over at the Plasman's place the other day and I think he was showing me that ID thing. HOLY CRAP! Its plastic, that's gonna break. You can expect to do real work with that thing. Hey, it might work just fine doing what it does and it does but that thing ain't gonna take no abuse. I find it kinda scary, I mean these are things that you are supposed to be able to climb MT Everest with right?
     
  15. moss

    moss ArboristSite Guru

    Joined:
    Sep 8, 2005
    Messages:
    952
    Likes Received:
    80
    Location:
    Jamaica Plain, Massachusetts
    I was just climbing SRT last night on Tachyon and it worked with the Grigri for rappel but it's kind of tight. Not surprised, it's thicker then Petzl's max rope spec of 11mm for the Grigri.

    I don't like the I'D because it's too big but all the parts engaging the rope are metal. The little plastic "safety" that allows you to take the biner off the I'D without disengaging the rope must be what you're referring to. I've never heard a report of that breaking. If it did you'd stay on the rope anyway. It's a good piece of gear.
    -moss
     
  16. treemandan

    treemandan Tree Freak

    Joined:
    Oct 3, 2006
    Messages:
    11,085
    Likes Received:
    481
    Location:
    chester co pa
    I would exactly call that stuff metal but I understand what you are saying. Yes, the handle, it looks like it would get snapped off pretty quick and with the cold weather it gets more " iffy". Also it looks like you have a big clock hanging from yer neck like that rapper dude.
     
  17. moss

    moss ArboristSite Guru

    Joined:
    Sep 8, 2005
    Messages:
    952
    Likes Received:
    80
    Location:
    Jamaica Plain, Massachusetts
    Funny! You should tell that to Petzl, maybe they can leverage the I'D into a new market.
    -moss
     
    EcoTreeCo likes this.
  18. Plasmech

    Plasmech Addicted to ArboristSite

    Joined:
    Dec 13, 2008
    Messages:
    1,164
    Likes Received:
    81
    Location:
    Aston, PA (19014)
    I absolutely *despise* that whole rapper crowd and every person/place/thing that comes along with it. Just thought I'd share that.
     
  19. Jules Bartow

    Jules Bartow New Member

    Joined:
    Apr 22, 2016
    Messages:
    1
    Likes Received:
    0
    Location:
    In the Vein
    Petzl Large Industrial Descender (I'D) used in cell tower industry where it's not called rappelling --it's called "Controlled Descent" using 1/2 (13mm) line. Slack tending while ascending and limb walking is definitely not what it's designed for. Great for rescue or hauling gear up using a progress capture. Panic feature a PITA if you're trying to descend quickly, because you can't. Nor can you load line upside down either --idiot proof.
     

Share This Page