[Public-list] Mast support beam

[Mike Lehman]

Stephen

On the later boats (Peter's is #478) the beam is internal to the liner. It 
is not a wood beam, rather an aluminum box beam that is part of the deck and 
liner of the boat. It is much more difficult to repair and the mast base 
sits on the aft edge of the beam rather that directly over it. Excessive 
backstay tension will cause the deck to deflect behind the mast base. It 
seems to go only so far, then stop. I have not seen a newesr (boat with a 
liner) have so much deflection as to interfer with the doors below. If 
someone has done a repair to the newer style boats, I would like to hear how 
it was done.



Mike Lehman
"Gilleleje" #505

~~~_/)_/) ~_/) ~~





----Original Message Follows----
From: "sousa, stephen (ENG)" <sousa_stephen at emc.com>
Reply-To: Alberg 30 Public List -- open to all <public-list at alberg30.org>
To: 'Alberg 30 Public List -- open to all' <public-list at alberg30.org>
Subject: RE: [Public-list] Mast support beam
Date: Mon, 3 May 2004 15:50:28 -0400

Peter,

I understand the comments from Mike and George, the step on #114 sits
directly over the beam and the center bolts actually are bolted through the
beam. Unless Whitby made changes during different production years. I
sistered the metal support plates over the main beam on our Alberg because I
had some deflection and doors into the v-berth would not close. That has
been repaired and I actually tuned the rig on Friday and everything is fine.

Stephen

-----Original Message-----
From: public-list-bounces at alberg30.org
[mailto:public-list-bounces at alberg30.org] On Behalf Of Peter Amos
Sent: Monday, May 03, 2004 3:42 PM
To: Alberg 30 Public List -- open to all
Subject: Re: [Public-list] Mast support beam


Stephen,yes,the point was that I could not understand why the mast was not
squarely above the beam.The cabin doors do close but there is indentation
behind the mast topside and a bulge in the cabin ceiling below.I dont want
to cure the symptoms without removing the cause. Peter

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