|
boneware
Apr 10, 2002, 6:35 PM
Post #1 of 10
(3188 views)
Shortcut
Registered: Mar 26, 2002
Posts: 99
|
I just got a lighter static line to use as a second cord for 2 rope rappels and doing a few canyon, it is much lighter than my 10.5 and takes more abuse. Question is what would be the best way to tie these 2 together?? Is the double/triple fishermans ok? or would it be better to use something else,i am about to do research on this because i am sure i have read it somewhere, this is jsut the first time the situation has arrisen. thanks
|
|
|
|
|
rrrADAM
Apr 10, 2002, 9:08 PM
Post #2 of 10
(3188 views)
Shortcut
Registered: Dec 19, 1999
Posts: 17553
|
In your case I would use a backed up 8, as the EDK is not recommended for ropes of different diameters. rrrADAM [ This Message was edited by: rrradam on 2002-04-10 14:40 ]
|
|
|
|
|
mauriceb
Apr 10, 2002, 9:16 PM
Post #3 of 10
(3188 views)
Shortcut
Registered: Mar 24, 2002
Posts: 247
|
boneware According to Chapter 6 of J.Long's How to Rock Climb! book the standard knot for tying two ropes together is the double fisherman's, aka grapevine knot, but this can be tough to untie. A figure eight follow through backed up by grapevines on each side is secure, easier to untie, and works well with ropes of different diameter. maurice
|
|
|
|
|
wigglestick
Apr 10, 2002, 9:17 PM
Post #4 of 10
(3188 views)
Shortcut
Registered: Jul 27, 2001
Posts: 1235
|
I sometimes do the same thing with a 8mm zip line that I have. I use an overhand knot, but as rrrAdam said a backed up figure 8 will work as well. Here is another tip. When you set up the rappell thread the rope through the anchor so that to pull the ropes you have to pull the skinny one. This places the knot on the proper side of the anchor to prevent the ropes from running through the belay device at different speeds. Also use a kliemheist or prussik to backup the rappel. The skinny rope reduces the amount of friction in the system and if you aren't ready for it it can cause problems.
|
|
|
|
|
boneware
Apr 11, 2002, 3:19 AM
Post #5 of 10
(3188 views)
Shortcut
Registered: Mar 26, 2002
Posts: 99
|
Thank you all for the advice, i knew i would get good answers quickly. thanks philip
|
|
|
|
|
apollodorus
Apr 11, 2002, 3:27 AM
Post #6 of 10
(3188 views)
Shortcut
Registered: Feb 18, 2002
Posts: 2157
|
The European Death Knot, which is basically taking both ends and tying either an overhand or a figure-8, is much less likely to snag on an edge when you pull your ropes. I'm too lazy to find the link and post it here, but if you search for European Death Knot, it's in there. By the way, it is NOT a death knot. That's just what they call it.
|
|
|
|
|
roadtrip
Apr 11, 2002, 4:06 AM
Post #7 of 10
(3188 views)
Shortcut
Registered: Mar 27, 2002
Posts: 63
|
Maurice is right about the double-fish's, especially for ropes of different sizes.
|
|
|
|
|
crux_clipper
Apr 11, 2002, 11:53 AM
Post #8 of 10
(3188 views)
Shortcut
Registered: Jun 14, 2001
Posts: 531
|
Another one is a reef knot backed up byt stopper knots. It's a really good knot, especially for rapping, because it's easy to untie afterwards.
|
|
|
|
|
rrrADAM
Apr 11, 2002, 12:10 PM
Post #9 of 10
(3188 views)
Shortcut
Registered: Dec 19, 1999
Posts: 17553
|
Do NOT use the EDK with ropes of different diameters. It IS prone to rolling apart. The EDK is the only knot I use for double-rope-raps, but my ropes are the same diameter. [ This Message was edited by: rrradam on 2002-04-11 05:12 ]
|
|
|
|
|
slcliffdiver
Apr 12, 2002, 3:44 AM
Post #10 of 10
(3188 views)
Shortcut
Registered: Mar 18, 2002
Posts: 489
|
When I use an eight or other follow through I put the knott in the fat rope first and follow through with the skinny rope. For me it's much easier to follow visually this way while I'm tying It (see which you like). It also seems more difficult for me to inspect knotts visually if ropes are of significantly different diameters (GV back ups very good). I use different knotts for rapping under different conditions (including what condition I'm in). Peace David
|
|
|
|
|
|