Quote:
Originally Posted by Ekka  Jim, what is the stretch factor of dynamic systems? |
It varies slightly between what size rope your using. At max breaking strength of the 4ton system, its 17% stretch.
If your using the rubber shock absorber, this adds 20cm stretch to the span.
The strength loss over time is calculated and tested to be 2% per year.
Soo if you have a 10m span, the system its self is going to stretch 1.7m at MAX breaking strength. In the tree, each leader is going to move 0.85m apart from each other. In a wind storm at the top of the tree thats not actually a whole lot.
The thing is with cobra, its a support system. Its not ment to do the trees energy distrubition for it, what the system is going to do is provide support and additional strength from what the tree already had before an arborist decided a brace needed to be installed.
