Norm_Hall
New member
- Location
- Wauconda, (Chicago),IL,USA
tech chord question
- Thread starter RANDY10
- Start date
Norm_Hall
New member
- Location
- Wauconda, (Chicago),IL,USA
Norm_Hall
New member
- Location
- Wauconda, (Chicago),IL,USA
Re: tech cord question
Close-up of the TVP splices, which are strate buries, no tucks. The exposed thread is a strand of the TVP, which I use to lock stitch the splice. It has an overhand knot tied in it, cause it won't melt with my 'hot knife'. I pull 1 extra strand out and use it to lock stitch the splice. A trick Stanley Longstaff taught me. So, only 7 strands, of 16, are buried inside. The cord has great flexibility and grabs & holds onto my 7/16's" Tower Line without having to adjust the VT.
Close-up of the TVP splices, which are strate buries, no tucks. The exposed thread is a strand of the TVP, which I use to lock stitch the splice. It has an overhand knot tied in it, cause it won't melt with my 'hot knife'. I pull 1 extra strand out and use it to lock stitch the splice. A trick Stanley Longstaff taught me. So, only 7 strands, of 16, are buried inside. The cord has great flexibility and grabs & holds onto my 7/16's" Tower Line without having to adjust the VT.
Attachments
countryboypa31
New member
- Location
- PA
Re: tech cord question
Norm where did you get the 5/16 tvp? I'm going to retire my Tech Red cord. Not sure if its the majority Technora that is in question, and i don't wanna find out the hard way. It worked perfect for the application though so i want a simular replacement.
Looking for a 5/16 hollow braid. Mostly for footlocking prussic, what would people suggest?
Norm where did you get the 5/16 tvp? I'm going to retire my Tech Red cord. Not sure if its the majority Technora that is in question, and i don't wanna find out the hard way. It worked perfect for the application though so i want a simular replacement.
Looking for a 5/16 hollow braid. Mostly for footlocking prussic, what would people suggest?
Re: tech cord question
I've always love the reliability of Tenex. Its got that squishy feel that just makes me like it. I know for a fact every knot I've tired in it just sticks and holds. Now for moving around in the tree I might go for something else because I'm still sticking with the old fashion. Working SRT with a hitch you have a very nice heat sink.
I actually cut my Tech cord "secret weapon" even before the recall, but from the discussion about bridges. I switched it to Tenex and use it in the same way Norm does.
I just didn't know for SURE if it was reliable. Don't get me wrong I check my gear all the time but to inspect every item every time is hard. As far as opening it up over paper is getting extreme for me. If you don't trust it switch it out.
I've always love the reliability of Tenex. Its got that squishy feel that just makes me like it. I know for a fact every knot I've tired in it just sticks and holds. Now for moving around in the tree I might go for something else because I'm still sticking with the old fashion. Working SRT with a hitch you have a very nice heat sink.
I actually cut my Tech cord "secret weapon" even before the recall, but from the discussion about bridges. I switched it to Tenex and use it in the same way Norm does.
I just didn't know for SURE if it was reliable. Don't get me wrong I check my gear all the time but to inspect every item every time is hard. As far as opening it up over paper is getting extreme for me. If you don't trust it switch it out.
Re: tech cord question
Norm, those are tidy-looking friction savers. I make similar versions with Tenex.
Is there a reason you bother putting in non-locking tucks, or any tucks at all for that matter? Your cords are more than long enough for straight buries to develop full strength.
I also wonder about all that goop you paint on the rope. Are you sure it is harmless to the rope? I have always thought plastic fibers are practically immune to common chemicals, but when I was testing several proposed pitch-removing agents on polyester I found otherwise. 60 hours soaking in concentrated household bleach, acetone, or laundry detergent did not weaken polyester, but 60 hours in denatured alcohol, (my favorite cleaning agent!), weakened the fibers by about 10%. Who knows about your goop?
I also wonder about the mechanical effect the goop might have in restricting the free motion of the rope fibers, which would tend to weaken the rope. There is probably no practical downside to your treatment of the rope, which will probably never see a load within a mile of its rated tensile. But for people interested in making their own splices, it might be worth discussing the risks and benefits of the techniques we use. I don't actually know the risks or benefits of your method--I am just wondering out loud.
Norm, those are tidy-looking friction savers. I make similar versions with Tenex.
Is there a reason you bother putting in non-locking tucks, or any tucks at all for that matter? Your cords are more than long enough for straight buries to develop full strength.
I also wonder about all that goop you paint on the rope. Are you sure it is harmless to the rope? I have always thought plastic fibers are practically immune to common chemicals, but when I was testing several proposed pitch-removing agents on polyester I found otherwise. 60 hours soaking in concentrated household bleach, acetone, or laundry detergent did not weaken polyester, but 60 hours in denatured alcohol, (my favorite cleaning agent!), weakened the fibers by about 10%. Who knows about your goop?
I also wonder about the mechanical effect the goop might have in restricting the free motion of the rope fibers, which would tend to weaken the rope. There is probably no practical downside to your treatment of the rope, which will probably never see a load within a mile of its rated tensile. But for people interested in making their own splices, it might be worth discussing the risks and benefits of the techniques we use. I don't actually know the risks or benefits of your method--I am just wondering out loud.
Norm_Hall
New member
- Location
- Wauconda, (Chicago),IL,USA
Re: tech cord question
I don't use them as friction savers. They are hitched on a 7/16's" static line with a VT and I use that to work off the static line with a doubled rope system. I had a 5/16's" eye & eye (TVP) with no tucks or brummels break tested by Sterling Rope. It broke at 7,481 lbs. It had about 2 weeks of climbing on it.
As far as the 'goop', I'm not worried about it. It brushes on and dries in 4-5 hours at room temp. I looked at the bottle to get the ingredients, but there are none on there. It's made in or bottled in Milwaukee, WI. I'll give em a call, just to make sure. I appreciate the concern.
As far as restricting fiber movement, It's a brush on tape. It acts like urethane coating. The fibers still move freely.
Derrick, check PM.
I don't use them as friction savers. They are hitched on a 7/16's" static line with a VT and I use that to work off the static line with a doubled rope system. I had a 5/16's" eye & eye (TVP) with no tucks or brummels break tested by Sterling Rope. It broke at 7,481 lbs. It had about 2 weeks of climbing on it.
As far as the 'goop', I'm not worried about it. It brushes on and dries in 4-5 hours at room temp. I looked at the bottle to get the ingredients, but there are none on there. It's made in or bottled in Milwaukee, WI. I'll give em a call, just to make sure. I appreciate the concern.
As far as restricting fiber movement, It's a brush on tape. It acts like urethane coating. The fibers still move freely.
Derrick, check PM.
Attachments
Re: tech cord question
[ QUOTE ]
I had a 5/16's" eye & eye (TVP) with no tucks or brummels break tested by Sterling Rope. It broke at 7,481 lbs. It had about 2 weeks of climbing on it.
[/ QUOTE ]
Yes, now I remember. I still can't think of a reason why it would break in the eye unless the eye somehow was experiencing lots of wear. The fact that it broke, rather than ripped apart, says the simple buries were not the weakest part of the whole assembly. Tucks or Brummels would not have helped at all. It's also worth noting that when it broke at 7480 lb in a straight pull between the eyes, the piece that broke failed at only 3740 lbs. That is bordering on scary.
That's a cool idea to hitch your DRT setup to the static line.
[ QUOTE ]
I had a 5/16's" eye & eye (TVP) with no tucks or brummels break tested by Sterling Rope. It broke at 7,481 lbs. It had about 2 weeks of climbing on it.
[/ QUOTE ]
Yes, now I remember. I still can't think of a reason why it would break in the eye unless the eye somehow was experiencing lots of wear. The fact that it broke, rather than ripped apart, says the simple buries were not the weakest part of the whole assembly. Tucks or Brummels would not have helped at all. It's also worth noting that when it broke at 7480 lb in a straight pull between the eyes, the piece that broke failed at only 3740 lbs. That is bordering on scary.
That's a cool idea to hitch your DRT setup to the static line.
New threads New posts
-
test
-
-
-
-
What's on your mind? TCI Magazine wants to know
- Started by Tree Care Industry Assoc.
- Replies: 23
-
Apr 09 (Free CEUs) & May 07 - 'Urban Forestry Today' Webcasts @ Noon (Eastern)- Started by UFT
- Replies: 0
-
