[Public-List] A-30 mast beam delamination

[Daniel Sternglass via Public-List]

Subject:
Re: [Public-List] MAST SUPPORT BEAM
From:
Wes Gardner via Public-List <public-list at lists.alberg30.org>
Date:
11/5/2015 10:46 PM

To:
JAMES DAY <junkflyboy at yahoo.com>, Alberg 30 Public List -- open to all 
<public-list at lists.alberg30.org>


James,

In the case of my 1966 boat, back around 1990 we had a machinist friend 
fabricate a welded stainless steel doubler, something of overkill, but 
it's held up great. It had two "side" plates and a bottom member welded 
to the side plates that followed the curve of the deck. We jacked up the 
beam against the hull under the floor and drilled for the through-bolts.

If you are not inclined to fabricate or making something yourself, I 
believe that the A-30 association made a batch of aluminum plates that 
serve this purpose, some time in the past. Some might still be 
available. If none are available, I am sure that a drawing is available 
from someone on the list. This is the "standard repair" for the mast 
beam delamination problem, and it seems like much less work than 
fabricating a new curved beam.

If you install these plates, make sure there is clearance between the 
top edges of the plate and the bottom of the deck, and that the beam it 
is jacked to the right height, before drilling for the through-bolts.

--Dan Sternglass
Watcher of the Skies, #201, 1966, Cayuga Lake, Ithaca, NY
> James,
>
> If you go to the Alberg site, scroll down to public list just under the PS, then hit the link where it says "Join the List at", then hit Public-List Archives at the top is a Search field.
>
> Sent from my iPad
>
> On Nov 5, 2015, at 5:40 PM, JAMES DAY via Public-List<public-list at lists.alberg30.org>  wrote:
>
> I am sure that this has been discussed, but I cant find a search window.
>
> Please advise if any drawings are available to make a new beam to replace the wood one that supports the mast on top of cabin. Would like to replace this before leaving this winter. I have access to a shop to make one from metal, but would like to have a set of drawings, at least the over all measurements, and curve. thanks for any help, feel free to send pm to junkflyboy at yahoo dot com
>
>
> thank you in advance
>
>
> James Richard day (retired having a ball)

-- 
dans at stmktg.com
mobile: +1607-592-8012

Strategic Marketing Associates
403 Highgate Road
Ithaca, NY 14850