First job with new gear.

[Blakesmaster]

BTW, I really liked masi's idea and will be trying that as soon as I book another job.

 

[pdqdl]

Regarding "having the wrong rope": The largest port-a-wrap is rated for use by up to a 3/4" rope, as shown in the PDF I posted above.

So the 5/8th rope you used is not too big. Compare your part number to the PDF to make sure.

 

[teamtree]

I absolutely love double-braid rope for rigging. I do use a Samson BRW climbing line for a ton of small rigging but my go to rope day in day out is 1/2" stable braid from Samson.

I think the rope through the porty is the the problem but I have had issues with larger ropes through a porty, especially my 3/4" stable braid.

I am really thinking about buying a GRCS, if I had the cash laying around...lol

 

[teamtree]

I was afraid of that but our previous double braid rope, which we had paid just as much for was only 1/2 inch and after rigging a few trees ( all natural crotches, of course ) it showed some serious wear so this time I upped the anti. My old boss ( also a natural crotch rigger ) uses 5/8ths double braid and has used the same 3 ropes for the past 5 years that I know of and though it shows some wear, I'm still not afraid to rig big wood with it. Plus it runs through the porty just fine. That's why I think the problem is a combination of new, stiff rope, and a new porty. Should I have bought a different rope? Maybe...

I am sure you know this but double-braid ropes are meant to be used with a block or pulley. It took me a few hanks before I figured it out...lol

I also have a box of ropes with knots I can't get out....lol (again)....but since I learned some knots I have not had to put any new ones it for a few years. I use it as a training tool for new guys.

 

[John464]

Should I have bought a different rope? Maybe...

no maybe about it. you DEFINITELY are using the wrong rope in your application. Its not how thick your rope it is what it is made of. For light rigging you want 1/2" rope with 6,000 -8,000 tensile strength, moderate elasticity or elongation(known as stretch), and good wear characteristics.

We dont mess with 5/8" Its either 1/2" or 3/4"(also a double braid), but only with the use of pulleys and blocks.

 

[pdqdl]

Murphy: I'm not picking a fight here, but True Blue is not listed on Samson's website under the category of "rigging". They have 5 ropes listed there; Arborplex, two twist ropes, Stable Braid, and Tenex.

http://www.samsonrope.com/index.cfm?page=13&app=26

I think that we all know how much stretch is in Tenex! Don't you suppose Samson knows enough about rope to say whether or not any given rope is suitable for rigging?


True Blue is a good rope, and very popular. Samson even states that it is good for "light rigging". They also claim that it has"high strength, low stretch, excellent abrasion resistance and a long service life" What was that? LOW STRETCH?

http://www.samsonrope.com/index.cfm?ind=13&app=25&rope=68&inst=1

That's ok. I like True Blue too. Much easier on the hands than Stable Braid. It's not as tough, though.

 

[murphy4trees]

samson rope

Ya,
I've been meaning to write something about smason calling true blue a "climbing line"... It's heavy... 8.8 lbs... vs velocity's 5.6 lbs... and is not splicebale... So calling that a climbing line is out of touch with reality! Maybe in 1990 it was a suitable climbing line, but times have changed.. SO it is a nice rope, even if they are clueless about what it is nice for!

AS far as low stretch... it has 2.5x the stretch as stable braid at 10% tensile... almost 2x as much at 20%... and 1.5x at 30%... Now that may not sound like much BUT.... Run those numbers through the rigging software with some serious shock loads and you'll see that is a huge difference... Where is the tree spyder when you need him! C'mon Kenny... talk to these people!

 

[Blakesmaster]

I am sure you know this but double-braid ropes are meant to be used with a block or pulley.

Wait, what? Why does the sherrill cat list it as highly abrasion resistant then? This sucks.

 

[pdqdl]

Ya,
I've been meaning to write something about smason calling true blue a "climbing line"... It's heavy... 8.8 lbs... vs velocity's 5.6 lbs... and is not splicebale... So calling that a climbing line is out of touch with reality! Maybe in 1990 it was a suitable climbing line, but times have changed.. SO it is a nice rope, even if they are clueless about what it is nice for!

AS far as low stretch... it has 2.5x the stretch as stable braid at 10% tensile... almost 2x as much at 20%... and 1.5x at 30%... Now that may not sound like much BUT.... Run those numbers through the rigging software with some serious shock loads and you'll see that is a huge difference... Where is the tree spyder when you need him! C'mon Kenny... talk to these people!

Several remarks here Murph:

1. What is this rigging software you are referring to? I am not familiar with it.
2. Stable braid and True Blue are made of the same material, but obviously have different construction. That increased stretch on the lower loads for True Blue is probably related to how it is woven together.
3. Why are we concerned about stretch at only 10% loading? That isn't enough of a hit to notice, IMO.
4. Stable Braid is pretty heavy too. I see that Samson no longer makes it in 1/2", so I suppose that they may be planning on True Blue to fill in there. In fact, they don't make 5/8ths, either. They also don't make ANY other variety of rope in 9/16ths. I wonder what is up with that?

I used to climb on 1/2" Stable Braid. Yep. It's heavy.

 

[Nailsbeats]

True Blue, True Blue, True Blue.......(chant)

 

[masiman]

BTW, I really liked masi's idea and will be trying that as soon as I book another job.

Thanks . I hope it works for you to.

I have been using 5/8 also but I recently picked up a 9/16. I'll start making whoopies and loopies out of the 5/8. I'll let you know if the 9/16 runs quicker than the 5/8. The 9/16 is cheaper too. I might go with a 1/2 when the 9/16 is retired like others use. The 5/8 and 9/16 is nicer in the hand for my groundie but I suspect the smaller rope will run quicker and let you have finer control with the porty.

Let me know how it works with the alternate routing.

 

[pdqdl]

...I see that Samson no longer makes it in 1/2", so I suppose that they may be planning on True Blue to fill in there. In fact, they don't make 5/8ths, either. They also don't make ANY other variety of rope in 9/16ths. I wonder what is up with that?

...

I stand corrected. If you look at Samson's website under "rigging", they only list two sizes: 9/16" and 3/4". http://www.samsonrope.com/index.cfm?ind=13&app=26&rope=165&inst=1

On a different page, they list sizes to 5" diameter and almost 700,000 lbs average strength: http://www.samsonrope.com/index.cfm?ind=12&app=32&rope=165&inst=1

So my previous statement was erroneous. I'm innocent though, they tricked me!

[question: how would you know the breaking strength of a 5" rope? What kind of equipment does it take to break a rope that big?]