[Public-List] Bulkheads

[Gordon Laco via Public-List]

Our backstay chainplate is fitted to the correct angle in line with the
backstay itself.  Our shroud plates are also correctly aligned - it appears
this was done at the factory.

Gord Laco #426 Surprise


On 2016-02-05, 9:20 AM, "Jonathan Bresler via Public-List"
<public-list at lists.alberg30.org> wrote:

> Backing up a moment, Don mentioned:
> 
> "The backstay chainplate offers a different problem. There is a moment of
> force there because of the design. The top bolt is aft of all the the
> others because *the chainplate is angled aft at the top*. Thus if the top
> bolt fails from a bad knee, then the leverage is increased on the lower
> bolts and shear is more likely. As the chainplate revolves around the
> bottom bolt as the others shear, and it holds because there is no longer a
> moment to shear it, once straight with the stay, there is a major overload
> in a straight pull to cause the shear then, and there is no deck that can
> hold that so the backstay flies free."
> 
> Needless to say, this scared the "stuffing" out of me particularly as it
> does not match what I remember seeing in #262.....hurriedly went to the
> boat last night to check.   To my relief, the backstay chainplate is
> installed through the deck and bolted to the knee at an angle in line with
> the backstay.
> 
> Did Whitby change the installation of the backstay chainplate at some point
> ?
> 
> Jonathan
> 
> P.S.  backstay chainplate is 1-1/4" x 3/16" x 6" (below deck) with 5/16"
> bolts, 1/2" pin in the chainplate and 1/4" 1x19 stainless steel wire
> backstay.
> 
> On Fri, Feb 5, 2016 at 8:16 AM, Jason S via Public-List <
> public-list at lists.alberg30.org> wrote:
> 
>> I also have had good luck with 3M4000 series UV..Very good seal and no
>> cracking or seperation from chainplates or deck areas after 2 seasons.
>> 
>> Jason
>> #457
>> www.svsalacia.blogspot.com
>> On Feb 5, 2016 8:05 AM, "via Public-List" <public-list at lists.alberg30.org>
>> wrote:
>> 
>>> 
>>> 
>>> For caulking chainplates I have tried numerous products over the 38 years
>>> we have owned the boat...my current favorite is 3M4000 UV.
>>> 
>>> 
>>> Mike Lehman
>>> 
>>> ~~/)~/)~~
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
>>> On Thu, Feb 4, 2016 at 2:56 PM -0800, "Stephen Gwyn via Public-List" <
>>> public-list at lists.alberg30.org> wrote:
>>> 
>>> 
>>> 
>>> 
>>> 
>>> 
>>> So what are people's favourite sealant? I've been using
>>> BoatLife polysulfide sealant. Polyurethane  (3M5200 and Sikaflex)
>>> is too permanent. Silicone is permanent enough and once you
>>> use it, nothing will stick to where it has been.
>>> 
>>> I was reading a british sailing, which recommended a butyl sealant
>>> which stayed sticky indefinitely, meaning that when the seal flexed
>>> and split, it would just seal itself again.
>>> 
>>> Thoughts?
>>> 
>>> SG
>>> 
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> 
>