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Old 08-17-2008
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SailorMitch SailorMitch is offline
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The ORC recommendation for breaking strength is 4,500 lbs. I just bought jacklines for my boat from JSI. The highest breaking strength I could find was about the 5,700 lbs quoted above.

here's the ORC reference.

4.04.1The following shall be provided:
a)Jackstays:
iattached to through-bolted or welded deck plates or other suitable and strong anchorage fitted on deck, port and starboard of the yacht's centre line to provide secure attachments for safety harness:-
MoMu0,1,2,3
iicomprising stainless steel 1 x 19 wire of minimum diameter 5 mm (3/16 in), or webbing of equivalent strength;
MoMu0,1,2,3
iiiwhich, when made from stainless steel wire shall be uncoated and used without any sleeving;
MoMu0,1,2,3
iv20kN (2,040 kgf or 4,500 lbf) min breaking strain webbing is recommended;
MoMu0,1,2,3
vat least two of which should be fitted on the underside of a multihull in case of inversion.
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