Cobra Synthetic Cabling Merits?

[Darrin Turnbull]

I read somewhere you don't use the shock absorber if the distance is more than 7 meters. Can anybody tell me if this is correct.

[Darrin Turnbull]

Good I've found it.

 

 

 

4. In case of long bracing distances of 8 m or more, don't install a shock absorber.

[Jake Andrews]

Good I've found it.

 

 

 

4. In case of long bracing distances of 8 m or more, don't install a shock absorber.

 

Where's that from, the manual?

[Darrin Turnbull]

Where's that from, the manual?

 

 

http://www.cobranet.de/en/3_9regeln.htm

 

[jomoco]

So let's do some testing on alders, Alnus rhombifolia specifically?

 

How much tensile force exerted on a two inch wide synthetic strap looped termination point, on say a five inch diameter vertical leader will it take before girdling occurs?

 

200, 500, 1000 lbs of tensile pull?

 

Jomoco

[Rich Rule]

What about to expansion loop?

[jomoco]

I'm gonna bounce my weight on it like shown in the instructional video.

 

If it can't take that without inflicting cambial damage?

 

I won't need a dynamometer to prove my suspicions any further.

 

Jomoco

[jomoco]

There's a basic and extremely fundamental flaw driving these attempts to rationalize use of cobra as beneficial to tree or client IMO.

 

It's like throwing everything you've learned as an arborist out the window, and saying that sapling looks a bit peculiar to me, let's leave it staked loosely, and hope doing so has no detrimental affects on proper trunk caliper growth.

 

Very messed up, at a very fundamental level.

 

Jomoco

[Mark Bolam]

Jomoco, do you think that to an extent people are choosing Cobra because it's faster and easier to install, and certainly less fatiguing than steel, rather than looking at the problem and choosing the best system available?

Let's move away from the fire-risk thing here, I'm talking UK specific.

[jomoco]

Absolutely Mark, sheer expediency trumping craftsmanship.

 

Reflects poorly on this entire industry IMO.

 

Jomoco