[Public-List] Chainplates

[Jonathan Bresler via Public-List]

David,

As I remember it, one bolt pulled due to the knee having weakened and the
rest of the bolts sheared off.

But that was three years ago anf my memory of the event may be faulty.

Jonathan
On Nov 1, 2015 6:42 PM, "David Van Denburgh" <denburgh at andrews.edu> wrote:

> Was the chainplate knee rotted, or did the bolts shear?
>
> David
> ________________________________________
> From: Public-List <public-list-bounces at lists.alberg30.org> on behalf of
> Jonathan Bresler via Public-List <public-list at lists.alberg30.org>
> Sent: Sunday, November 1, 2015 6:41 PM
> To: Alberg 30 Public List -- open to all; Gordon Laco
> Subject: Re: [Public-List] Chainplates
>
> The first occassion that comes to mind is that on TC Williams' Argo #247,
> the chainplate pulled through the deck during the first day of the 2012
> Rankin Regatta.
>
> Jonathan
> On Nov 1, 2015 6:33 PM, "Gordon Laco via Public-List" <
> public-list at lists.alberg30.org> wrote:
>
> > Have there been any failures of these bolts besides the one Yves Gelinas
> > experienced in the Southern Ocean?
> >
> > Gord #426 Surprise
> > (just back from the 2015 Misery Trip, not quite Southern Ocean but a good
> > facsimile...we made it back OK, broke nothing, nobody got hurt... My wife
> > is
> > annoyed with me for doing it... )
> >
> >
> > On 2015-11-01, 6:10 PM, "Wes Gardner via Public-List"
> > <public-list at lists.alberg30.org> wrote:
> >
> > > My mistake! You know I kept looking at my chainplate bolts and in my
> mind
> > > thinking "yup, those were upgraded to 5/16" because they were new and
> > > shiny....seems when I put the 7/16 wrench on the head of one, I
> realized
> > it's
> > > just a 1/4-20. Yeah, they are shoulder bolts (I believe I read that the
> > > originals were 1/4-20 but with thread the whole way), so they were
> > replaced,
> > > but not upgraded to 5/16. Furthermore, they set the bolts with the nut
> > on the
> > > chainplate end allowing the chainplate itself to bear on the threaded
> > part of
> > > the bolt before the shoulder started....geez, at least turn the bolt
> > around.
> > > My understanding is that most of these failure issues have been in
> shear,
> > > right?
> > >
> > > And when I looked really close, the bolts for the uppers are stretched
> a
> > > little bit.....hmmm
> > >
> > > I was going to bed the actual chainplate, where it contacts the knee,
> in
> > 5200
> > > as it will never need to be removed from the boat again. However, I'm
> > going to
> > > bed and seal the chainplate covers (mine has Shaefer cover plates) in
> > 4200.
> > >
> > > I'm also going to change out the backstay bolts as well.
> > >
> > > Can anyone add any helpful hints or "gotchas" specific to the Alberg
> 30?
> > >
> > > Wes
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