[Public-List] Bulkhead through companionway?

[Andrew M Shaw]

I think we all have to judge our own boats. The 'dimple' on 477  was
pretty severe including some cracks/splits running out from it. One of
these splits ran all the way to to the tabbing "shelf" which supports (or
rather, is supposed to support) that trapezoid floorboard in the forward
cabin, causing the aft and port shelves be crushed down by the
floorboard. I've never been able to use that floorboard due to lack of
support. The boat was like this when I bought it so I've been
anticipating this repair. Yours may not be as bad. I'm just glad it's
turning out to be simpler than I expected (I think :).

Andy

On Wed, 12 Mar 2008 11:10:26 -0400 "Dave Terrell"
<dterrell at message.nmc.edu> writes:
> I have this "dimple" but understood that if the doors fit, I did not 
> have a problem. Do I have a problem? I too have a liner boat.
> 
> david, scholarship II, 432
> 
> >>> Mike Lehman <sail_505 at hotmail.com> 03/12/08 9:12 AM >>>
> 
> Andrew,
>  
> This repair has been done to a number of liner boats. The bulkhead 
> rests on the liner and there is nothing underneath to connect the 
> liner to the hull, so over time and compresssion, the line starts to 
> 'dimple' around the doorway to the forward cabin. If you pull up the 
> floorboard in the forward cabin and look aft, you will see the 
> bulkhead is just resting on a 1/4" or so piece of liner. The good 
> news is that once the compression reaches a certain point (about 
> 3/8") it never goes any further. Whitby added more suppor under this 
> forward set in later boats.Mike Lehman ~~~_/)_/)~~_/)~~~> To: 
> public-list at lists.alberg30.org> Date: Wed, 12 Mar 2008 09:06:02 
> -0400> From: andymshaw at juno.com> Subject: Re: [Public-List] Bulkhead 
> through companionway?> > Hi Rachel,> > Thanks for your input. 
> Reading your notes made me realize I slightly> mispoke. I work on 
> wooden boats so that tends to slip into my> terminology. To truly 
> transfer load to the "keel" on an Alberg you would> actually have t
>  
>  o move the companionway to starboard so the compression> post would 
> be on centerline (which I believe at least one person has> done). I 
> plan to glue/bolt in as broad a piece of timber (a step as it> 
> were)as will fit below the post to spread the load around as much 
> as> possible on that area.> > Hope this is a little clearer.> > 
> Andy~> > > On Tue, 11 Mar 2008 22:13:33 -0400 Rachel 
> <penokee at cheqnet.net> writes:> > > > On Mar 11, 2008, at 9:18 PM, 
> Andrew M Shaw wrote:> > > > > At the forward end is a 3/4" ply floor 
> timber but> > > nothing directly under where the bulkhead rests 
> except the balsa > > cored> > > step. So I'm not surprised it had 
> caved in. I will correct this in > > the> > > repair process and 
> transfer the load to the keel.> > > > I'm not speaking directly to 
> your boat here, as I'm not very > > familiar > > with the liner 
> boats. But I've wondered about where it's best to > > transfer loads 
> in a fiberglass boat with integral ballast. It seems > > > > like it 
> might be
>  
>   best NOT to transfer loads to the ballast pig (at > > least not 
> many of them), because really, it's just a chunk of iron > > sitting 
> inside one bit of the hull's fiberglass (whereas on, say, a > > > > 
> wooden boat, there are significant structural members down there, > 
> > such > > as the keelson).> > > > Since a fiberglass boat is 
> typically more of a "unibody" type > > structure, maybe it makes 
> more sense to spread the load out with > > tabbing to the sides of 
> the hull, etc.? Of course that's not to say > > > > you can't have 
> any load on the keel, but I do wonder how best to > > spread > > out 
> the load, if one has "the opportunity" to redo the bulkheads and > > 
> > > some of the surrounding structure (vs. purposely trying to 
> transfer > > the > > load to the ballast with a compression post).> 
> > > > Physicists and boat designers feel free to pipe in! :)> > > > 
> Rachel> > > > _______________________________________________> > 
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"There is more to sailing than ropes and winches, cleats and bulging
sails.
There are faraway places and the ever changing light, and the silence,
and a
great peace at the bottom of your soul." - Ferenc Mati

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