[Public-List] Mast beam almost finished!

[Michael Connolly]

Bill, 
I believe that you are absolutely correct.  My thought is that I will be able to remove my mast beam, disassemble the laminations, clean up and then re-laminate using some type of Epoxy resin adhesive. I plan to consult with the Gudgeon Brothers at West Systems and have them work with me to select the best possible adhesive for this application. 
  
I will also document this project for the Association so others might see what I have done.  Pretty much the same process as Jeffery but I plan to reuse the laminates from the original beam. 
  
Michael #133  

----- Original Message -----

From: "Bill Boyle" <wpb1210 at yahoo.com> 
To: "Alberg 30 Public List -- open to all" <public-list at lists.alberg30.org> 
Sent: Saturday, October 26, 2013 10:22:18 AM 
Subject: Re: [Public-List] Mast beam almost finished! 

My take on why gluelams from the 60s and 70s fail is they probably used resorcinol glue.  That glue will fail after time.  



________________________________ 
From: Gordon Laco <mainstay at csolve.net> 
To: Alberg 30 Public List -- open to all <public-list at lists.alberg30.org> 
Sent: Saturday, October 26, 2013 9:31 AM 
Subject: Re: [Public-List] Mast beam almost finished! 


Perhaps to provide a second line of security to the glue in the laminations?  Just guessing, Surprise is a liner boat so we don't have the wooden beam.  

Gord 


On 2013-10-26, at 10:22 AM, Glenn <brooks.glenn at comcast.net> wrote: 

> Gord, any idea why Whitby put the thu bolts in the beam in the first place? 
> 
> Gpb 
> 
> Sent from my iPad 
> 
> On Oct 26, 2013, at 5:00 PM, Gordon Laco <mainstay at csolve.net> wrote: 
> 
>> Hi guys 
>> 
>> Side forces on the heel of the mast are zero.  The geometry of the rigging turns it all into compression.  And if the rigging let go, for whatever reason, there'd still be zero side force at the mast step because the mast would fall to leeward, pivoting on its heel.  (Unless that cross-wise bolt is in place, in which circumstance the mast would tear up the step plate and what cabin top it managed to keep hold of) 
>> 
>> With that cheery image placed in everyone's minds, I'll say good morning to all of you! 
>> 
>> Gord #426 Surprise 
>> 
>> 
>> On 2013-10-26, at 9:11 AM, Jeffrey <fongemie at gmail.com> wrote: 
>> 
>>> Thanks Glen. 
>>> 
>>> You are probably right about using the through bolts.  I'm still 
>>> trying to get my head around the forces on the last plate. Obviously 
>>> down. But then I'm sure there's some pushing to the side, depending on 
>>> the tack.  What I'm thinking is that the bolts holding down the mast 
>>> plate only need to resist force in sheer, so that depth wouldn't 

>>> matter after a certain point.  Shorter lag bolts that are thicker 
>>> might be stronger than thinner through - bolts? 
>>> 
>>> 
>>> jeff 
>>> 
>>> Jeffrey Fongemie 
>>> 
>>> Seagrass 
>>> Alberg 30 #116 
>>> Boothbay Harbor Maine 
>>> 
>>> 
>>> 
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