My reading of the BUS article was that Tartan initially had attributed the failure to the shroud tightening as a conibutory factor but then later said it was due to a poor overlap in layup with no mention of the shroud adjustments. Did anyone else read it this way?
You're correct. They blamed the shrouds and the layup. I was reacting more to their statements that rigs should not be tensioned under load, which seems to be an overstatement. As soon as you tighten wire beyond slack, it's under load. But they were pretty clear, I thought, about saying you should not take the slack out of the leeward shrouds which is essentially what I do.
Frankly, I'm more worried in my very solidly built PSC, about a rig failure than a hull failure. First, I don't go crazy about tightening -- I use a gauge, and second, the pamphlet that came with the gauge made a pretty good point that aggressive wave action will put more stress on a slack rig that bounces around than a taut rig that doesn't. In a stiff breeze you will have a heavily loaded rig whether you previously tightened it or not.
I did second-guess myself, however, when I saw Tartan's statement. Probably written more by their lawyers than their riggers.
Thanks for your thoughts, Dave M., I'll keep doing it the same way.
For the fellow who asked, I believe galling is when stainless screws are tightened against stainless bolts (or turnbuckles) without lubrication and little balls of metal are sheered off and weld themselves between the parts. It shouldn't happen between bronze and stainless and less so if you put lithium grease on the turnbuckles every season. Nonetheless, repeatedly tightening a stainless screw under load isn't good for it.