!New official GRCS attachment! (a GRCS advert.)

F

frans

Location
healdsburg, CA
Greg Good is poised to debut the GRCS attachment. It is called the 'VISOR'. It is made for using on removal trees only.

It attaches to any GRCS made, no matter what edition you may have. It allows the user to literally hang the device onto a tree prior, to attaching the ratchet strap. This makes installation onto the tree a true, one-person, tottally easy job.

In addition, the Visor will prevent the device from sliding up the trunk under heavy loads because the Visor is set into a deep cut into the trunk wood. You make the horizontal (to the ground) cut into the trunk, insert the edge of the visor, and the GRCS is now hanging from the trunk supported by the Visor. Then take the strap, walk (or reach) around the trunk and hook the strap onto the device. Ratchet the strap tight, and you are Good to go.

Greg will bring the Visor to TCIA in Columbus Ohio.

Frans

-ADVERT(s)-

'Did you know'... In todays escalating home ownership market, and the rising cost of steel, you could spend the same amount of money buying a crane as you could buying a house? Or... you could simply buy a house, AND a GRCS. And STILL come out ahead! /forum/images/graemlins/grin.gif

Why are there no used GRCS's for sale? Seems like those who buy them, hang onto them for life.
 
got any pics?...I let my neighbour build me a cradle to support a Dynameter which slots into the base plate of the GRCS. Put a cable winch on the other end and you have a GGRS ( good gear recking system )! /forum/images/graemlins/happydance.gif

Have enjoyed recking old gear and used climbing lines with this baby!!

jelte
 

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it's more or less just a steel cradle that supports a dynameter, that slots into the base plate. This gives you a fixed anchor (:)) to pull on. We use a standard cable winch (Turfer) to pull with, note the tag line in the pic is to catch the recoil of the cable when the rope or what ever you are recking brakes /forum/images/graemlins/aaa.gif

the Dynameter is rated to 5000kg so you can really give it large!! hope this explains it a bit better Frans...

jelte
 

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this is what the high-v broke at(it's in kg's) this rope was well used and about 5-6 years old....that's quite a difference then with a new rope!

I hav'nt yet recked any hardwear i.e biners, i think the flying shrapnal could be a problem... /forum/images/graemlins/grin.gif

jelte
 

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Are you not repeating tests that have already been done throughly ad nauseum by rope manufacturers?
Just trying to find the point of all that effort.

I am sure you know that your tests results may differ widely due to the age of the rope, the tightness of the bend in the spliced eye, the manner in which the rope is held in order to test to distruction, etc etc.

Because it is so hard to determine exact strength values in used gear, I dont bother with using things like a Dynometer for measuring strength loss. I do think that device is great for demonstrating 'shock load' forces and to use the display on the dynometer to illustrate the increased load even with a small drop...

Gerry Baranek had a hank of 'true blue' hanging in a tree for many years and the test to distruction found only a small decrease in breaking strength. this rope was hanging in the shade, but it was effected by the cycles of nature over the years...
Thanks for the pictures
 
Re: !New official GRCS attachment! (a GRCS advert.

O jeah, Mahk.
Blame it on the guy that holds the dynafor /forum/images/graemlins/grin.gif
Yup, it is 1266 kg. I climbed that rope for 2 years and after that it had 4 years of shedlife.

Frans, let me tell you what the point was.

A big capital FUN and a lot: see it with your own eyes.
There is almost nothing that is more rewarding than to see what your old equippement is capeble of withstanding.
I am a seeing is believing kind a guy and reading it in a book means not as much to me as to "feeling" the real thing.
 
Re: !New official GRCS attachment! (a GRCS advert.

Well in that case you have my wholeharted support. I am also subject to overwelming desires to just hammer on equipment to really see for myself what happens at the supposed 'working load limits' that the manufacturer states.
Frans
 
Re: !New official GRCS attachment! (a GRCS advert.

It was a pre spliced rope Svein.

As you can see, it did break on the splice...... (and on the most used part of the rope).
The rope was used by me while i was climbing using the both ends of the rope with prussics (I didn't use a flipline in those days).
The place of failure is the spot where the core partly was taken out (to make the splice more smooth and not so thick).
But still. A rope as old as that one with a working life of two years and a shelf life of a few more. I think when I still used that one, I wasn't risking my life.
A drop in the rope of 1200 kg's would leave me broken apart in the tree I guess. /forum/images/graemlins/smirk.gif
 
[ QUOTE ]
Are you not repeating tests that have already been done throughly ad nauseum by rope manufacturers?
Just trying to find the point of all that effort.


[/ QUOTE ]

Frans, Do rope manufacturers test old used rope?? or used slings etc...? i guess the idea is that our gear gets more of a hammering then maybe what some of the things we use are made for...like web slings. What is the point that you need to replace them?

the way of attachment is a bit of a problem.... finding a way to make the rope brake where you want is a bit tricky...:) but the knot on that high-v was stronger then the rope! we tried different attchments like a very large figure of eight, a port-a-rap and the d ring of the Dynometer, all bend ratios were to small to brake a new piece of climbing line, even with damage to the mantel(we cut a few strands of the mantel).

But hey, it's lots of fun and we did get some interseting results....rope is strong stuff:)

jelte
 
[ QUOTE ]

Frans, Do rope manufacturers test old used rope?? or used slings etc...? i guess the idea is that our gear gets more of a hammering then maybe what some of the things we use are made for...like web slings. What is the point that you need to replace them?

the way of attachment is a bit of a problem.... finding a way to make the rope brake where you want is a bit tricky...:) but the knot on that high-v was stronger then the rope! we tried different attchments like a very large figure of eight, a port-a-rap and the d ring of the Dynometer, all bend ratios were to small to brake a new piece of climbing line, even with damage to the mantel(we cut a few strands of the mantel).

But hey, it's lots of fun and we did get some interseting results....rope is strong stuff:)

jelte

[/ QUOTE ]

Well in that case you have my wholeharted support. I am also subject to overwelming desires to just hammer on equipment to really see for myself what happens at the supposed 'working load limits' that the manufacturer states.
Frans (check my prior post)
 
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