[Alberg30] Help- Tin Canning Bow

[John Birch]

Ralph,

As you have a second generation A-30, the sheer clamp is the raised area above the deck where the hull/deck meet - it is riveted and glassed over to join the deck to the hull. The hull extends up to the under part of the deck and forms an L, the deck has a raised L flange which sits on top of the hull L flange and they are riveted together and glassed and, or, otherwise sealed - the whole thing is capped by the teak toe rail.

Impact, if sever enough, is sufficient to spring the two flanges apart - but I have seen many sever impacts which should have popped the clamp and failed to do so. That's why I suggested looking for an impact point. A wear and tear failure is quite rare. It is a robust arrangement, although perhaps not as robust as the first generation A-30 - this is a relative measure - it is certainly more robust than the average boat construction by a considerable margin.

Mike's suggested repair is the way to go - he has much experience in working on A-30's - that is not a left handed comment - his work is first rate. Suggest you listen to his advice.

Warms up in February - yikes, yer lucky ... we're done until late March at the earliest, more like April. 
But then we get to enjoy single malts longer in front of the fireplace - I guess it all works out ; )

Cheers,

John
  ----- Original Message ----- 
  From: Capnreitz at aol.com 
  To: public-list at alberg30.org 
  Sent: Saturday, November 16, 2002 3:27 PM
  Subject: Re: [Alberg30] Help- Tin Canning Bow


  John,
  I do not believe the stem plate to be the issue. The problem begins at about the point of the port chock. I looked hard but saw no  cracks or other ddamage which might have arisen from a hard contact of any sort.
  What does the sheer clamp look like, what is it made of? How does it clamp to hold the hull to the deck? 
  I have gotten many worthwhile answers, and will post an e-mail after I have completed the repairs. It will be spring as it is very cold and wet here now and will probably remain so till Feb.

  Ralph 
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