Kernmaster is a 48-strand Kernmantle rope with an outer polyester jacket over an energy-absorbing nylon core. Kernmaster makes an excellent SRT line. It is very low stretch and works great in all of your favorite Single Rope hardware.
Yale's Kernmaster is a Kernmantle climb line with good energy absorption. The core fibers of Kernmaster are braided, unlike most other kernmasters, which makes it perform more like a 24-strand, allowing for both access and DdRT climbing using quick hitches. The supple hand of Kernmaster works well with hybrid SRT devices like the Hitch Hiker. CE/EN1891 rated.
Quick Overview: 7/16” diameter, 7,100 ABS, 5.5 lb per 100’.
Rated: Excellent Review by: Ken
“Best rope period. Low stretch but good enough to work off single rope, easy on the hands for double rope, super light, firm grip, not slippery and really tough cover. The colors aren't 80s sunglasses flashy and still easy to see in the tree. Wesspur's price is a steal and a smooth setup for any gear with their pro splices.”
Rated: Excellent Review by: Niceguydave
“This rope from Yale has been around for a while. It turns out that it makes an excellent SRT line when using hybrid work systems like the Ropewrench, Unicender, and Hitchhiker. It is a Kernmantle rope that utilizes a braided core instead of the more common parallel strands. It maintains excellent hand, knots well, and doesn't get 'cabled' or stiff like some static lines do when used. It has a Nylon core, which gives it energy absorption. This is an excellent choice for folks who are working a tree using SRT.”
|Diameter||:||7/16” / 11 mm|
|Average Strength||:||7,100 lb / 3,220 kg|
|Material||:||Polyester / Nylon Core|
|Wt. per 100’/100m||:||5.5 lb / 8.2 kg|
|Elastic Elongation||:||3% at 10% ABS|
This great article at Yale Rope's website explains the how the ability of a rope to absorb impact is affected by the elasticity of the rope. Breaking strength is not the only important factor in determining if a rope is right for the job. Dynamic Energy in Arborist Ropes
The American National Standards Institute (ANSI) has released the ANSI Z133 safety requirements which apply to arboriculutral operations.
Arborist climbing lines are required to have a minimum breaking strength of 5,400 lb (24 kN) when new, and should be no smaller than 1/2” (12.7mm) unless the employee has been trained in the use of smaller line (down to 7/16” / 11mm), and the line's working elongation should not exceed 7% at 540 lb load.
Kernmaster 7/16” meets ANSI Z133-2012 standards, so long as the user has been trained in the use of smaller diameter lines.
The full ANSI Z133 safety requirements are available on our tree care standards page.