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