[alberg30] Mast support beam

[Guy Lalonde]

Peter.

I own #466 and the problem you describe on #478 sounds similar to mine, although not caused by a specific incident. Sounds like you got some moisture in the core around the mast step area. You might want to check on that. Sounds more than likely that this is the cause of your problem.

Another thing you might want to check, although less likely, to see if you have a combination of the above problem and the following one.

In the newer boats (around #400 and above), mast loads are transfered from the deck beam to the bulkhead which then rests on the liner. There may be portions underneath the liner which aren't supported against the hull. With a flashlight, look aft under the v-berth cabin sole. Look to port & starboard of the bilge where the bulkhead rests against the liner. You will likely see there is no support under the liner for about 12 inches on each side of the bilge.

On some boats this lack of support has contributed to the mast going "down south". Also, again looking aft under the v-berth cabin sole, look at the liner just above the bilge (the underside of the door step). You may see balsa core with out any fiberglass on it bilge side( ??? ), doesn't make for a solid composite. Back above the liner, look for any stress cracks or outright cracks on the liner floor on both sides of the bulkhead, especially where unsupported.

To repair, check out the association's "Alberg 30 Maintenance manual" in section A for the mast step area. For liner support problems, check out section C-4, from a 1991 Mainsheet article (the article describes how an A30 's depressed liner almost closed off the water hose beneath it).

Guy
#466
  ----- Original Message ----- 
  From: Peter Amos 
  To: Alberg30 at egroups.com 
  Sent: Thursday, May 18, 2000 5:20 PM
  Subject: [alberg30] Mast support beam


  When I was putting "Tait Tait" in mothballs for the summer I noticed that the mast support beam in the cabin has developed a small but definite bow and the cabin ceiling immediately behind the beam has a bump in it too. I think it is a result of some hard sailing during the winter including a bad Gulf Stream crossing when I lost concentration a couple of times. Consequence, a couple of nasty jibes that hung up the boom in the back stay.Bad sailing but the autopilot could'nt handle it and after eight hours I was getting a bit weary.
  I  think Tait Tait, (478) has an aluminium mast support beam and the mast seems to sit not squarely on it but half  on and half aft of it.

  Has anyone else had these beam and ceiling problems and made an effective repair?
  When I get back to Florida next season the mast will be unstepped for re-rigging etc. and it will be a good opportunity to tackle these problems.

  As always advice and information is appreciated

  Peter Amos
  P.A.Amos at tesco.net U.K.

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