[Rhodes22-list] New Joint of Deck and Hull from originator

[The Rhodes 22 Email List]

Chuy,
 
I'm jumping back into this discussion one last time. I'm not a marine  
engineer, but have built/rebuilt many boats over the past fifty years. Unless  
you are building a hull out of steel or concrete, they are going to flex. I  
would guess that even steel or concrete can flex under certain 
circumstances.  The hull to deck joint of the R22 flexes because of the many  varied 
forces  applied to it by the mast, rigging and wave action. Epoxy or fiber 
glassing the  joint will remove the ability of the joint to flex. In fact, I 
would be willing  to bet that over a very short period of time you will find 
that it will crack  and pulverize due to the previously mentioned forces 
working against it. It  would be a monumental chore to separate the joint enough 
to thoroughly clean it  AND remove the gel coat for best adhesion. As I have 
previously stated, it does  not bond well with gel coat. The process to 
fiberglass the joint would be  incredibly labor intensive and in my opinion a 
waste of time and resources. Why  would you want to do this when a very simple 
and time tested solution has  already been put forth on the list. The 
problems older hulls are experiencing  with the joint are due to improper use of 
materials during original  construction. In short, adhesives/caulking have 
come a long way in forty some  years. The one part polyethylene products have 
a life expectancy of fifteen  years with direct exposure to UV rays from 
the sun. I wonder how long they will  last in a covered joint application.
Good luck with whatever you do, but remember, removing and repairing a  
failed fiber glassed joint might be more than anyone would want to undertake,  
even Mr. Casey.
 
Rummy
 
 
In a message dated 2/6/2015 1:14:39 A.M. Eastern Standard Time,  
rhodes22-list at rhodes22.org writes:

Hi ALL  ,
I received my special anniversary issue of Sail Magazine  early in the week 
but did not have time to read it., Volume 46 Number 2  February 2015.  
Tonight I open it to the table of contents and guess what  one of the articles 
was about?   Page 60, "Sealed up Tight When is  comes to securing the hull to 
deck, which method is best?" by Don  Casey.

The author states "Boat builders are increasingly relying on  high-strength 
methacrylate adhesives to fuse the hull to the deck into a  single, leak 
proof component, in some cases omitting mechanical fasteners all  together".  
Further he states that this process is expansive so some  builders use 
flexible adhesives to bond the deck and hull, like 5200.  He  goes on and states 
that repairs on the joint are not treated as two halves,  since there is no 
reason to.  In most cases the deck to hull repair is  done without a joint 
in the damaged area. 

The article is very well  written and easy to follow.  He explains the 
different hull to deck  joints used.  Their strengths and weaknesses and the 
reason to for their  use.  

After reading the article, I think that I most of my ideas  with a few 
minor adjustments. 

Thanks for all your  input.

Chuy
AfterMath   1987
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