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kaakre 10-29-2006 04:27 PM

Eliminate Compression Post? Calculation of Force
For you structural engineers out there.

Anybody out there have a sense of how hard it would be to remove a mizzen compression post and replace the support function with an arch/box structure and side tie ins? I want the open space.

It is a 56 foot steel ketch and I assume that there is some downward force design load on the mizzen mast that, if met by the arch/box and distributed into the topsides could allow the removal of the post.

How is mast downward force calculated?


sailingdog 10-29-2006 04:44 PM

You really need to consult with a marine architect for this type of modification. I doubt your insurance company will approve of the modification otherwise, and it would adversely affect your coverage, should any damage occur to the mizzen or aft deck.

AlainPOIRAUD 10-29-2006 04:58 PM

I believe this is a very bad idea..

On my own boat, I have modified it and it is now a RUM reserve with a capacity of 10 liters of rum..

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kaakre 10-29-2006 05:01 PM

OK I will do than with the Main!

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