[Alberg30] knee hull

[George Dinwiddie]

Under the toe rail isn't so important.  It's under the deck, itself,
that you should be sure has no gap.  Your "before" pictures look like
there was a gap there.  Movement on the inboard end of the knee will
tend to pull the other end off the hull.

You don't need to use teak for the knees.  A cheaper hardwood will do
fine.  As you see, marine ply has worked pretty well.

I would cover the knee with a layer of mat, a layer of woven roving, and
another layer of mat.  The roving is very strong, and the mat increases
the surface area of the bonds.

  - George

Alfredo wrote:
> Thanks for your reply Greg, I checked Kasia # 383 and it has no gap.
>  If your close to your boat would you kindly take a peek for me?
> Kasia is the Only Alberg near me and my only source for comparison.
> 
> Thanks again, Alfredo
> 
> --- greg vandenberg <greg at vandenbergphoto.com> wrote:
> 
>> Alfrado.... I have been following at times the knee thread and am 
>> wondering if the reason the gap was there was to allow water to 
>> escape in such a leak prone area... a good thing. The plywood was 
>> in good condition so the the design was pretty good. The material 
>> that is attaching the knee looks like woven roving which is 
>> superior to mat. If you seal it up tight and water inters at the 
>> chainplate and it will again over time, the wood will rot and fail
>>  with out any warning. I am not so quick to think Whitby made many
>>  design mistakes. They did have a bear bones approach but not bad 
>> design.
>> 
>> 
>> Kindest Regards- Greg
>> 
>> 
>> 
>> 
>> Alfredo wrote:
>> 
>> 
>>> Hello everyone, I've added some pictures of the work done Sunday
>>> on the forward knees.
>>> 
>>> Thanks to Brian's guidance and encouragement I was able to 
>>> complete this phase of the project in about 30mins. The next step
>>> will be to rebuild the knees with teak and lots of fiberglass 
>>> mat. I hope to be done with this project by Saturday if all goes
>>> well.
>>> 
>>> If you look at the pictures, you'll notice that there's a gap 
>>> between the toe rail and the inside cabin roof. I was thinking of
>>> building this area up probably with teak and fiberglass to give
>>> the knees a solid area to brace against.
>>> 
>>> I'm not a structural engineer by any means so, if anyone has any
>>> suggestions I'll gladly listen.

-- 
  ----------------------------------------------------------------------
   Hope your road is a long one.                        George Dinwiddie
   May there be many summer mornings when,       gdinwiddie at alberg30.org
   with what pleasure, what joy,                 http://www.Alberg30.org
   you enter harbors you're seeing for the first time;
                                            from 'Ithaka' by C.P. Cavafy
  ----------------------------------------------------------------------

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