[Public-List] Mast Beam Repair

[Mike Lehman]

If you look at the pictures (about the 6 one down) at http://alberg30.org/maintenance/disorganized/deckbeam/ you will see what I mean. This helps prevent the twisting of the beam when it is under load.

 
Mike Lehman 

 
><((((º>`·.¸¸.·´¯`·.¸><((((º>`·.¸¸.·´¯`·.¸><((((º>
 
 






 
> Date: Thu, 7 Jan 2010 18:22:01 +0000
> From: crufone at comcast.net
> To: public-list at lists.alberg30.org
> Subject: Re: [Public-List] Mast Beam Repair
> 
> 
> 
> Mike, 
> 
> The tapered supports that you mention are they ment to support more of the mast beam via the bulkhead?  I assume that these supports would not eliminate the depressions in the coach roof aft of the mast step plate because they suppport the beam and do not extend underneath the coach roof? 
> 
> Michael #133 
> ----- Original Message ----- 
> From: "Mike Lehman" <sail_505 at hotmail.com> 
> To: "Alberg 30 Public List -- open to all" <public-list at lists.alberg30.org> 
> Sent: Thursday, January 7, 2010 12:53:33 PM GMT -05:00 US/Canada Eastern 
> Subject: Re: [Public-List] Mast Beam Repair 
> 
> 
> Worth menitioning, at least, is that one problem is that the beam is not directly under the mast. Only the front of the mast sits on the beam, so there is twisting involved which is why many boats have depressions in their decks behind the mast. This is also why a single-plate repair did not work. While repairing the beam (which ever methods you choose), plan to add some long tapered supports to the aft-side of the bulkhead on each side of the doorway. 
> 
>   
> Mike Lehman 
> 
>   
> ><((((º>`·.¸¸.·´¯`·.¸><((((º>`·.¸¸.·´¯`·.¸><((((º> 
>   
>   
> 
> 
> 
> 
> 
> 
>   
> > Date: Thu, 7 Jan 2010 09:36:00 -0800 
> > From: wayfarer3134 at yahoo.com 
> > To: public-list at lists.alberg30.org 
> > Subject: Re: [Public-List] Mast Beam Repair 
> > 
> > I had a hard time visualizing them as well until I saw the picture - basically, the slots provide a path for the fibreglass to connect both sides of the tabbing/layup so that the stress is taken up by fibreglass rather than epoxy. I was in fact thinking the mast beam had vertical laminates - as I said, I haven't seen my mast beam yet. For horizontal laminates, your idea of screws to key it is basically the same thing as the slots - the difference is a screw is a round/metal hole to key rather than a rectangular "hole" filled with fibreglass/epoxy.                                                
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