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Author: Brendan Subject: Spectra lifeline attachment Info: (9648 views) Posted: Sunday 7-28-13 09:56:08 AM |
1) No knots: when the class allowed spectra lifelines, it was specifically discussed that they must be terminated with proper splices. I've seen several lifelines terminated with knots, which reduces the strength of the lifeline by 1/2.
2) 3/16" minimum. 1/8" Spectra is not suitable for Express 27 lifelines.
3) Strive for SK-90 or better. Using regular Amsteel (SK-75) is problematic as it will creep and need to be tightened almost every time you sail.
4) Chafe protection! This is the single biggest risk with spectra lifelines. You cannot run them through the stanchions without some chafe protection or they will quickly be worn through by the stanchion. Even so, chafe will occur and wear your lifelines out much more quickly than wire.
5) Lashings are fine for terminations. 1/8" spectra (of any type) is suitable. Spectra lashing is fine for wire lifelines as well. Spectra lashing is cheaper, easier and likely stronger than turnbuckles, and is the standard on modern lifelines.
6) "Continuous" just requires that the lifelines run from the aft stanchion all the way to the bow pulpit. They can actually be discontinuous pieces that are properly attached to each stanchion.
7) Aft stanchion support: With wire lifelines, many people run the lifeline through the aft stanchion then straight down to the toe-rail (with a sharp turn at the aft stanchion. This will not work with spectra lifelines--they will quickly chafe through at that point. You pretty much need a discontinuous piece to support the aft stanchion from bending.
The best way to terminate spectra lifelines to the aft stanchions is to have stainless "rings" welded to the top of the stanchion (rather than the holes with tubes that most stanchions have).
Finally: despite the promise of spectra being lighter, cheaper, and easier to replace, think twice about using spectra lifelines on Express 27s. The constant creep requires constant adjustment to meet the class sag rules, and inevitable chafe requires much more frequent replacement than for wire. Doing a good job with spectra with proper chafe protection typically costs as much or more than using wire.
I'm going back to wire lifelines the next time I replace mine.
--brendan
:: We are replacing our life lines with Spectra.
:: Could anyone share their attachment method and how they
:: are adjusting the tension.
::
:: Thank you
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