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  #1  
Old 09-28-2008
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hull deck joint

hi

looking at a hanse. the hull deck joint is an inward turned flange. it appears to be screwed rather than bolted together which i havent seen before (though what i havent seen before could fill a warehouse) - anyone familiar with this technique and any comments one way or the other?

thanks again in advance.
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Old 09-28-2008
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Originally Posted by ArgleBargle View Post
hi

looking at a hanse. the hull deck joint ... it appears to be screwed rather than bolted together ....
You need to get beyond "appears..." as use of screws would be definitely a low quality way to do a critical job like this, and I would be shocked that a big name like Hanse would use such a technique.
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Old 09-28-2008
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count yourself shocked. they definitely are screws.
i did a little more searching and found that the hull-deck joint is also bonded
(see: http://www.sailmagazine.com/features/HanseFactory.pdf which briefly describes their method)
although i still wonder, even if chemically bonded, why screws were used instead of bolts.
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Old 09-28-2008
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ArgleBargle-

The screws are probably just there to hold it until the chemical bonding sets. Some of the adhesives used in bonding the hull-deck join are incredibly strong and in some cases are sufficient to hold the joint together by themselves. On older boats, where such adhesives were not available, through-bolting was a necessity.
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Before going into the bash bad mouth thing.

I know the procedure they use, and the deck is glued with high strenght adhesives.

The scews, that have little structural effect are only to keep the bonding thight during the cure process.

Believe me I AHVE SEEN a stripped out Hanse inside...

They have other more important faults and deffects, but hull/deck bonding is not one of them
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Old 09-28-2008
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Giulietta

thanks. what would you say their more important faults and defects are?
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