[Public-List] Bulkhead through companionway?

[Andrew M Shaw]

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 to 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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