[Alberg30] A30 mast support beam

[Wally Moran]

Dan Spurr wrote a book which i mention on my website, 
www.georgianbaysailors.ca, in which he addresses mast compression and 
rebuilding or installing a beam under the mast. Interestingly enough, 
I was just reading it last night for the same problem on my 
Challenger.
This book pretty much covers all of your questions. The book is The 
Seaworthy Offshore Sailboat.
I would suggest (George, do you concur?) that the mast should come 
down, since the standing rigging would have to be loosened anyway. 
Two, the beam won't sag because you've spread the weight out over the 
hull via the beam and as for three, I'll leave that to someone who 
has done this job.

Wally
s/v Publisher's Choice


>George: couple of dumb(or maybe not) questions- 1. Can you jack the beam
>up(carefully)
>with the mast in place-if so-some tips,pls.
>2. Assuming one uses the Washington Inc aluminum plates(they have them for
>my boat,
>A-35($285 a pair)- when you jack up the beam & fasten on the plates, to the
>beam-
>why won't the beam sag again(this from a non-engineer with a slight dislexic
>problem-
>maybe they're one & the same)I understand you glass or seal the extremities
>& the overhead,
>but is this enough??-thks.
>
>-----Original Message-----
>From: George Dinwiddie [mailto:gdinwiddie at min.net]
>Sent: Thursday, February 21, 2002 11:52 AM
>To: public-list at alberg30.org
>Subject: Re: [Alberg30] A30 mast support beam
>
>
>Dan,
>
>Jan Grodzinski posted (on the member list) a company that digitized
>and cut the plates for him.  I've copied the company address to
>http://www.alberg30.org/maintenance/disorganized/deckbeam/repair.html
>
>  - George
>
>>  Dan Morley said:
>>
>>  I have been speaking with Kirk from Washington Aluminum, regarding
>>  aluminum plates to reinforce the mast support beam of my 1968 A30.  The
>>  shipping / customs procedures for shipping to Canada are expensive and
>>  awkward - not to mention the very unfavourable $ exchange!  My beam does
>>  not appear to have sagged at all, but is just starting to delaminate.
>>  Thus, I think I could use my exisitng beam as a template, and have the
>>  plates manufactured locally (but might this be a bad idea?).   I am
>>  wondering, however, if there is a chance someone out there already has
>>  templates for the repair plates?
>>  Thanks
>>  Dan Morley (#322)
>
>--
>  ----------------------------------------------------------------------
>   George Dinwiddie                             gdinwiddie at alberg30.org
>   The gods do not deduct from man's allotted span those hours spent in
>   sailing.                                    http://www.Alberg30.org/
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>
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-- 
The gods do not deduct from man's allotted span the hours spent in 
sailing. Anon
www.georgianbaysailing.ca for interesting reading for sailors
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