Join Date: Nov 2008
Location: Deale, MD
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Re: Amsteel lifelines--why is a lashing needed?
a. Brommel splices can be tied without both ends available. The method is probably faster on a long line. Google it. Amsteel is child's play to splice.
b. Breaking. The weakens the line about 40% from the references I found; yup, that's serious. I would use 1/4" Amsteel for protection from UV and in any event line very rarely breaks around knots and splices, they more often break due to chafe, which will not be at the splice. The weakest spot might still be a stanchion pass-through or an attachment. This is something we allow for. But we we would need a special reason.
c. Pull-out. Not if the tail is whipped down and the bury is the same. Slightly longer bury is certainly practical. Any bury-only splice (Amsteel or polyester) can pull out if not lock stitched or whipped; that is the reason for the brommel lock; it does not add strength.
d. Gates are required if not all of the crew is athletic. I commonly take passengers over 80 and disabled. Correct, they are simple to insert where needed. In our case, we have 6 gates: fore and aft and one at each transom (cat).
e. Cover. My understanding is that over sized Amsteel will offer longer service life and better economy than the alternatives and I think I am not alone. Since the stanchion pass throughs are sized to pass 3/8" line, I will also add fiber chafe guards as needed, probably Spectra.
Yup, not a good idea. But there may be an application somewhere. That's why we ask around.
(when asked how he reached the starting holds on a difficult rock climbing problem that clearly favored taller climbers - he was perhaps 5'5")
"Well, I just climb up to them."
by Joe Brown, English rock climber
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Last edited by pdqaltair; 11-12-2013 at 09:48 PM.