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From: Peter Ogilvie (no email)
Date: Wed Mar 08 2006 - 17:45:37 EST
I have not heard of a rig failing because of wire failure, doesn't mean it hasn't happened, however. It's always seems to be a swage, turnbuckle or tang giving way. The classic indicator of a failing wire cable is broken strand(s) in the bundle. Way late in the service life when that happens.
A ten year service life is probably erring on the conservative side. If I was going to sea, I'd go with that time frame, however. I wouldn't go to sea with swage fittings, in any case, so would swap out the wire when I put on the mechanical terminals. For coastal cruising and day sailing, you undoubtedly could go longer. Just dye check the swages every year. Another trick for extending the service life of swages is to end for end the wire so you don't always have the same side down where it can easily trap water. 304 stainless wire is very prone to corrosion when compared to 316. I would not use 304 if given a choice.
Aloha
Peter O.
Philip <> wrote: Hi group. I have a question that perhaps someone has some hard data on.
It has to do with replacing the standing rigging.
I know swedge terminals fail due to what is referred to as stress
corrosion, but for this question forget the terminals, Failures of Norseman
and Staylock fittings are virtually unheard of and that is what I use. I am
asking about the 1 x 19 304 SS wire itself.
Some say to replace it every ten years, but can not come up with a reason.
I once asked a rep from Stay-Bright (when they were selling the brand of
ELC wire), when to replace the wire, he said why? is it broken?
I have thought about this and the image of the Brooklyn and Golden Gate
bridges come into my mind. They have been using same wire for YEARS. (It
is, of course, not Stainless. )
Somehow I am still not satisfied. Is there really any data our there
regarding the longevity of the wire itself? Has any one actually had a wire
part other than at the terminal? If so where did it fail?
An unsure and enquiring mind wants to know.
Thanks for any response.
Philip
Philip & Marilyn Lange
AE4OV & KD4JRC,
S/V ORYOKI
Witness 35 Catamaran
http://www.oryoki.net
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