Beeline cords--non-heat resistant CORE

southsoundtree

southsoundtree

Been here much more than a while
Location
Olympia, WA
A blended poly/Technora cover provides extra protection for the 12 strand core in this line from Yale. Two sizes are available, and the rope construction differs between them. 5/16” Bee Line has a Vectran core and 75% Technora/25% polyester jacket. The 3/8” line has a polyester (non-heat-resistant) core and 50/50 Technora/polyester jacket. Technora fibers are heat resistant to 900°. Breaking strength is 8,000 lb. for 5/16” and 7,500 lb. for 3/8”.

What is the deal with the 3/8" having a non-heat resistant core? Could the core be damaged by heat without the jacket showing signs of heat damage?

What is the heat range of a 50/50 jacket. Seems like part of the jacket could be damaged by heat as well.
 
Re: Beeline cords--non-heat resistant

I like both beelines but it's always bugged me that they are completely different cords with different splices.

The core of the 10mm is 3/8" Yalex (Tenex) so it's not like it will melt easily... makes a pretty double braid splice. I don't care for it as a climbing hitch.
 
Re: Beeline cords--non-heat resistant

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The core of the 10mm is 3/8" Yalex (Tenex) so it's not like it will melt easily...

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Tenex doesn't melt easily?!?
 
Re: Beeline cords--non-heat resistant

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The core of the 10mm is 3/8" Yalex (Tenex) so it's not like it will melt easily...

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Tenex doesn't melt easily?!?

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From the Yale Cordage website:

Yalex – Easily Spliced, great for Hip Prussics – 100% high tenacity Polyester single braid is great for friction hitches where high heat is not an issue. Great for Hip prussics on lanyards. Available in a variety of colors for ease of identification. Also commonly used for Spider Leg assemblies.
 
Re: Beeline cords--non-heat resistant

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Tenex doesn't melt easily?!?

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Ever used it? I doesn't last as long as HRC but it makes a sweet climbing hitch. Use it a lot, burn out of a few trees and it will get glazed and worn out... but it doesn't melt.
 
Re: Beeline cords--non-heat resistant

That's news to me.

I actually stopped using tenex because of the concern for having to bail-out, and the subsequent melting. I guess I was mis-informed? Everything I've read, including Frick-n-Fraxinus' post seems to refer to a low melting point.
(480 degrees compared to 780 degrees and up.) Then again 480 degrees may be pretty hard to acheive in a climbing hitch?

I did like it as a split tail and would be happy to continue using it. But all things being equal I like a higher tensile strenghth anyway...
 
Re: Beeline cords--non-heat resistant

If you liked Tenex try Ice, its also made by Samson but its heat resistant and a higher breaking strength. Slightly different construction but still a hollow braid. Its going to be my next friction cord.
 
Re: Beeline cords--non-heat resistant

Ice is nice for a while, but when it wears down, your hitch will start to lock up a lot more. I can't remember why exactly, but its a lot like tenex. I don't know if others have experienced this.
 
Re: Beeline cords--non-heat resistant

I like Ice. I'm using it on Lava. I was only surprised by how fast it roughed up! It looks ancient and only has a dozen climbs or so on it.
 
Re: Beeline cords--non-heat resistant

As I recall, and it's been a while since I researched all this, that 480° is the melting temperature, but it starts to get plastic or elastic at only 300°.

The significance is that the temperature wouldn't have to reach anywhere near 480° for a failure to occur, and it may begin stretching as it approaches 300°.
 
Re: Beeline cords--non-heat resistant

To me, Ice is the closest thing to Tenex with a high heat resistance but it's not quite the same. I like Ice for when my rope is covered with pitch... it slides when HRC sticks like glue.

Tenex is tried and true, not dangerous. You just have to replace it more often.
 
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