[Public-List] Mast Support Beam

[George Dinwiddie via Public-List]

Jason,

You have a balsa core and Wes' boat has a masonite core. The masonite is 
heavier, but doesn't seem to rot the same way that the balsa does.

  - George
    Calypso, #543

On 2/8/16 3:35 PM, Jason S via Public-List wrote:
> Wes,
>
> I believe Mike is correct, guy who installed plates didn't fix it properly.
> That does not mean that it is sound now. You cannot just change the shape
> of the orginal deck shape and lamination and assume it ok. In order for the
> deck to deform like that some integrity had to be lost, something had to
> give or else it would have maintained it's shape.
>
> When I removed my mast step and top layer and all the rotten core I could
> see where the bottom of the core had delaminated when it had become
> distorted. Probably well before core turned completely rotten. You'd be
> surprised at how well the fiberglass is adhered to wet core...that balsa is
> some strong stuff.
>
> Will it ever be an issue....I am not sure anyone can say 100%. These boats
> get older each year....things that haven't been a problem may start showing
> their age and will eventually need to be addressed.
>
> I still believe that some of the issue has to do with the fact that the
> mast and mast step is not sitting centered on the beam.
>
> Jason
> #457
> On Feb 8, 2016 3:15 PM, "Wes Gardner via Public-List" <
> public-list at lists.alberg30.org> wrote:
>
>> Hi Mike,
>>
>> That my friend is EXACTLY the answer I wanted to hear!!  I could tell by
>> the caulk that things hadn't moved much (if at all) since that repair had
>> been done.
>>
>> Thank you for verifying my observations.  I do intend to clean up some of
>> those on-deck fittings - one isn't even used anymore...
>>
>> Wes
>>
>> On Mon, Feb 8, 2016 at 3:08 PM, Mike Lehman <sail_505 at hotmail.com> wrote:
>>
>>> Wes,
>>>
>>> You beam looks fine. The compression you are seeing is from before the
>>> beam was reinforced. Whoever did the aluminum reinforcement plates,
>> didn't
>>> crank the beam all the way up to take out the deflection. But it won't
>> move
>>> with those plates in place.
>>>
>>> -----Original Message----- From: Wes Gardner via Public-List
>>> Sent: Monday, February 08, 2016 12:53 PM
>>> To: public-list at lists.alberg30.org
>>> Subject: [Public-List] Mast Support Beam
>>>
>>> Hi All,
>>>
>>> My boat is a non-liner boat #196.  The mast support beam has been
>>> reinforced with aluminum plate on both sides of the beam.  Looking at the
>>> photo that looks forward, there IS a flat spot in the cabin top.  I’m not
>>> sure whether I’m concerned about it or not.  In that same photo, there
>> are
>>> four nuts that hold a fairly substantial pad-eye plate near the base of
>> the
>>> mast.  You can see the pad eye with a single Harken block in the photo of
>>> the mast base.  If I eye-ball one against the other, it tells me my mast
>> is
>>> resting fairly square on the beam (meaning it’s not too far forward or
>>> aft.)  Also when I “sound” with my plastic hammer, everything is rock
>> solid
>>> as far as the core is concerned.  The other photo of the reinforcing
>> plate
>>> looking aft, although it’s not pretty, there are no leaks.
>>>
>>> I think I’m content to leave things alone.  Any comments and/or
>> suggestions
>>> are always welcome.
>>>
>>> https://www.dropbox.com/s/1nbw95vyxmuxify/Mast%20Support%20Beam.jpg?dl=0
>>> https://www.dropbox.com/s/7nat262in0euf3w/Mast%20Base.jpg?dl=0
>>>
>>>
>> https://www.dropbox.com/s/q8hsrt2m5603vy6/Mast%20Support%20Fwd%20Side.jpg?dl=0
>>>
>>>
>>> Wes #196 Griffin’s Faith

-- 
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