[Public-List] Mast Beam Variation

[Jeffrey]

Have there been any failures of the beam? Any while the lamination was
still strong? It would have to be early in the boats life to determine
that I guess.

Not to say the aluminum plates are not a good idea, but wouldn't it
stand to reason that if the wood itself was in good condition, then a
new lamination using an epoxy glue likely last another 40 years? Or,
even a new laminated beam using oak and epoxy?


-Jeff








On Wed, Jul 16, 2008 at 10:12 PM, Lawrence Morris <morris.lc at verizon.net> wrote:
> It is not the epoxy that fails it is the wood that fails inevitably.
>
> Larry
>
>
> On Jul 16, 2008, at 6:49 AM, Jeffrey wrote:
>
>> Larry,
>>
>> I would bet (in my opinion) that a lamination done properly with a
>> good modern adhesive would last a very long time.
>>
>> T-88 by System Three would be a good product to use:
>> http://www.systemthree.com/p_t_88.asp
>>
>> It is designed as an adhesive. It's even FAA certified..people build
>> airplanes with the stuff.  I don't think our mast beams are subjected
>> to all that much stress.
>>
>> -jeff
>>
>> On Tue, Jul 15, 2008 at 10:17 PM, Lawrence Morris <morris.lc at verizon.net>
>> wrote:
>>>
>>> How about sandwiching the AL plate in side the beam  if you are going to
>>> remove it.  Relaminating is just setting your self up for a future
>>> failure.
>>> It is a weak design.  The AL plate is a permanent fix.   Sometimes they
>>> go
>>> slowly sometimes suddenly
>>>
>>> Larry
>>
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Jeffrey Fongemie
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