[Public-List] Chainplates

Tue Nov 3 03:07:32 PST 2015

I have the same problem though my rig hasn't come down. When we bought the boat we failed to notice that the previous owner had put large washers on the port chain plate bolts and that the surrounding bulkhead was soft due to years of water getting in. The ply was soft enough that the 2 inch washers had sunk in to it as the bolts had been tightened. Our answer was to replace the bulk heads and the mast beam which had also failed over time. This then led to a major refit which is still on going...

-----Original Message-----
From: Jonathan Bresler via Public-List <public-list at lists.alberg30.org>
To: Wes Gardner <wesgardner1952 at gmail.com>; Alberg 30 Public List -- open to all <public-list at lists.alberg30.org>
Sent: Mon, Nov 2, 2015 10:56 am
Subject: Re: [Public-List] Chainplates

Photos on the Alberg 30 website of Argo #247 after the rig dropped due to
the
upper port chainplate pulling
free.

http://www.alberg30.org/gallery/main.php?g2_itemId=903
http://www.alberg30.org/gallery/main.php?g2_itemId=907
http://www.alberg30.org/gallery/main.php?g2_itemId=912
http://www.alberg30.org/gallery/main.php?g2_itemId=916
...
the
"next" button will take you to a couple more photos of the
same.

Jonathan

On Sun, Nov 1, 2015 at 7:45 PM, Wes Gardner via Public-List
<
public-list at lists.alberg30.org> wrote:

> Fortunately, my knees and
bulkhead show absolutely no stain or
> discoloration at all.  Someone must have
kept at the chainplate cover
> plates.
>
> The bolts for my uppers are
definitely deformed.  For me, a dismasting
> just isn't worth the risk. I have
access to a bench top drill press so it's
> just a matter of slacking one
shroud at a time, rig a temporary as
> required, unbolt the chainplate and
drill it out.  I've read all the
> threads on the list and I've not heard any
problems with actually getting a
> drill in there to drill the knee or
bulkhead-there's not a lot of room, but
> it looks doable with a small drill
driver.
>
> Sent from my iPad
>
> > On Nov 1, 2015, at 6:33 PM, Gordon Laco
<mainstay at csolve.net> 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
> >> _______________________________________________
> >>
These businesses support your Association:
> >>
http://www.alberg30.org/store/A30supporters.html
> >> Please support them.
>
>> _______________________________________________
> >> Public-List mailing
list
> >> Public-List at lists.alberg30.org
> >>
http://lists.alberg30.org/listinfo.cgi/public-list-alberg30.org
> >
> >
>
_______________________________________________
> These businesses support your
Association:
> http://www.alberg30.org/store/A30supporters.html
> Please
support them.
> _______________________________________________
> Public-List
mailing list
> Public-List at lists.alberg30.org
>
http://lists.alberg30.org/listinfo.cgi/public-list-alberg30.org
>

--

Jonathan M Bresler
Alberg 30 #262
Annapolis/Eastport
MD
_______________________________________________
These businesses support
your Association:
http://www.alberg30.org/store/A30supporters.html
Please
support them.
_______________________________________________
Public-List
mailing
list
Public-List at lists.alberg30.org
http://lists.alberg30.org/listinfo.cgi/public-list-alberg30.org