Treemotion bridge material?

[porcupine]

Horse walks into a bar, why the long bridge? ......... Sorry

No but really, what's the plan with your long bridge?

 

[Treezybreez]

This is a pretty long thread about whether to use a manufacturer spec'd $20 bridge or a $10 alternative that might kill you. Just saying.

Actually you would save a lot more than $10 if you had a spool of bridge material on hand. It would also encourage me to replace my bridge more often.

The thing that irritates me, is that Terfulberger realized that they could make more $$$ if they stopped offering Globe 3000 in longer lengths. The Treemotion bridge is simply a short length of globe 3000 with a lock stitched knot on one end. You the customer of the harness have to tie one knot anyways. why not let us tie both? There is nothing special about their bridge.

 

[MikePowers321]

I have been using Yale kernmaster safari 11mm as a replacement for the time being (I simply had some on hand). Anyone see any safety issues with running this line as a bridge?

http://www.treestuff.com/store/catalog.asp?category_id=142&item=3553

I was sad to see the 10mm Globe unavailable in custom lengths as well my friends

 

[Ragnar]

Strange that a rope is so hard to obtain. Even though I don't expect to burn through a lot of replacement bridges, it was a consideration when choosing a saddle.

The bridge on my New Tribe Onyx looks to be this stuff (Teufelberger Platinum 10.5). Sold by the foot. Any reason it could not be used for others?

https://www.treestuff.com/store/catalog.asp?category_id=142&item=2138

 

[Porqchop]

Horse walks into a bar, why the long bridge? ......... Sorry

No but really, what's the plan with your long bridge?

I find it comfortable and effective to be able to adjust my adjustable bridge from next to nothing when tying I to a spar, to arms length+ when ascending double rope. I just measured my old bridge which was some random rope, and a little longer than necessary, but not much: 7 feet all told. I'm also spreading the load on it somewhat, since it's never exactly in the same position for long.

I forget the name of the company teufleberger bought that made globe, but I don't see globe 3k listed there only globe 5k which is larger I think

Sent from my Nexus 5X using Tapatalk

 

[JeffGu]

Lots of certified harnesses used numerous different ropes for the bridge... it would be hard to imagine that the particular rope you choose to use makes any difference, as far as safety, as long as you consider the obvious:

rope radius for the connection devices (ring, swivel, etc.)
construction materials of the rope (self abrading fibers?)
wear and ease of inspection
strength ratings of the bridge material

Assuming you're connecting the bridge to the harness in the same manner as the OEM one, any rated cordage of suitable materials, inspected regularly, should work fine. Some might last longer than others in this application, but OEMs as a rule discourage aftermarket parts and customization if it affects their sales of the parts most likely to wear out. Teufelbooger could have used Arbormaster for the bridge, and still got the harness certified. But, it would be pretty hard to sell a meter of that stuff at a jacked up price.

 

[SomethingWitty]

Lots of certified harnesses used numerous different ropes for the bridge... it would be hard to imagine that the particular rope you choose to use makes any difference, as far as safety, as long as you consider the obvious:

rope radius for the connection devices (ring, swivel, etc.)
construction materials of the rope (self abrading fibers?)
wear and ease of inspection
strength ratings of the bridge material

Assuming you're connecting the bridge to the harness in the same manner as the OEM one, any rated cordage of suitable materials, inspected regularly, should work fine. Some might last longer than others in this application, but OEMs as a rule discourage aftermarket parts and customization if it affects their sales of the parts most likely to wear out. Teufelbooger could have used Arbormaster for the bridge, and still got the harness certified. But, it would be pretty hard to sell a meter of that stuff at a jacked up price.

That 1/2" rope would be sooooo heavy...

 

[JeffGu]

Yeah, almost as heavy as that Rook pulley on the bridge, eh?

 

[Brocky]

FSE Robline is the company that still makes it. I could only find European marine websites that offer it. One site said the 3000 has a different cover that makes it softer, but also has less Dyneema, so weaker. They both come in many diameters.

Edit: Australian sites also offer it.

 

[treegongfu]

Anyone have an opinion on epicord as a replacement for globe3000 ?

 

[Brocky]

Both the cover and the core contain some percentage of Technora which has been proven to be a bad choice for bridge use.

 

[treegongfu]

Thanks.Brock.

 

[castanea]

Anything with technora in the sheath is also going to abrade whatever its coming in contact with quickly than polyester, etc. So if you have a sliding bridge ring it will wear out quicker.

Globe 3000 had some sort of secondary polyester sheath layer to reduce or prevent core/cover slippage. I'm not sure how much of a marketing gimmick this was, or how relevant it is to use as a harness bridge. The Globe 5000 had it also, but the current one, the Globe 5000 MK2 just has a normal sheath. Anyway, this type of dyneema core halyard line and every company making rope for sailboats has their own version. They still make a Globe 5000 MK2, which is available here for $1.46 a foot from Minnesota. I looked into this a few months ago when TreeStuff first sold out of the Globe 3000, and I don't really recall finding any other domestic sources of the 5000 (edit: fisheriessupply at least had it too).


https://www.dynamicsailor.com/store/cat/3_8_10mm_Halyards/


As I remember, you're going to get a very similar thing buying New England Endura Braid, Samson Warp Speed (used for the spliced bridges Buckingham harnesses as I remember). I think there will be some differences in flexibility and sheath thickness.

I would just make sure to liberally lock-stitch the termination knots somewhat like the original bridge, with long tales and fused tips. I'm not an expert but dyneema is very slippery, and I'd rather not find out what the stopper knots will do under any type of shock load, even with a polyester sheath adding grip. Its easy to find references to dyneema core / sheath slippage on sailing websites, resulting in broken sheaths from overloading.

Its a relatively bulky and used up about 22" of cordage per end, but the EStar stopper knot was designed for dyneema:

http://www.animatedknots.com/estarstopper/

Globe 3000 (discontinued):

Globe 5000 (discontinued):

Globe 5000 MK2 (I think this is a picture of a small diameter version, but not the lack of secondary sheath):

 

[treegongfu]

Thanks for the indepth response, castanea.


I'll try to source Endura Braid or Warp speed from a local sailing supply.

 

[reginav79]

Hi Everyone, I thought that this might help answer some of the questions involved in the discussion about the treeMOTION rope bridge.
Please reference the link below:

http://www.teufelberger.com/uploads...ds/Produktblatt_treeMOTION_rope_bridge_EN.pdf

 

[castanea]

Thanks for the indepth response, castanea.


I'll try to source Endura Braid or Warp speed from a local sailing supply.

Let us know how they handle, I wonder if any of them are remarkably less flexible.

 

[Raven27]

I'd like the treemotion to not slip down to my ass all the time I'm not some skinny dyde, 5'9, 190, and once I put a top handle on my hio, I spend countless times pulling the thing up. I can't go any tighterrors on the waist strap, I have to duck in just to keep it up where it's tolerable at best, so far I'm not happy with it when it sits right , it's fantastic , problem is, it rarely sits right

 

[islandarb]

One prob^ no damn ass to keep it up....sorry

 

[castanea]

@Raven27 I would try out some suspenders

http://www.treestuff.com/store/products.asp?category_id=301

 

[Raven27]

Will likely give the suspendrest a shot