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Discussion Starter · #1 · (Edited)
Sampson has performed UV testing on Amsteel that suggests a useful lifespan of 5-8 years, depending on how strength you can afford to loose. That is always the compromise with rope; strength fades starting day one. If you over size a bit, however, that life can be very long indeed, exceeding the fatigue life of wire, but now we're getting off topic.

However, while brommel splices do not require stitching, bury splices do, and many projects require a bury splice at one end. Given that the thread is going to loose strength much faster, how do we know how much thread is enough? Yes, some of the thread is on the rope and thus protected.

Thoughts? Since the thread does nothing but prevent the splice from walking before the load comes on, perhaps the strength requirement is so minimal as to be almost negligible. Further, I'm going to guess that the line becomes less slippery over time and slippage even less likely. Perhaps that last point is it; if there is enough stitching to hold the first day, it will always be enough.
 

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Discussion Starter · #7 ·
How about Maxijacket on Amsteel or STS-12 lifelines? If chafe is managed, UV might be the limiting factor. Refreshing the coating every few years would be light work.
 

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Discussion Starter · #9 ·
Maxijacket isn't exactly a cheap option at over $50/qt.

The lockstitch, as said above, is just for when the line is not loaded, they provide zero strength. After a line has been loaded and used for some time, the outter core compresses the inner, and creates a texture of the inner core, further increasing friction.

If you're worried about it, just re-stitch it after 8 years. But most of us have other projects to work on instead of worrying about something that perhaps, maybe, might be an issue.
I hear everything you're saying.

a. Yes, $$, but very little is needed, far less than a quart. You can buy 4 ounces for $7 + frt.
MaxiJacket Coating

b. I was actually thinking about deterioration of the entire line this time.

And actually, most projects are "might, maybe...!" Just something to discuss on an internet forum.
 
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