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Old 11-04-2015, 07:06   #1
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Mast/Boom etc question

Perhaps (read probably) a stupid question but cant seem to find a deff answer in search online.

I'm starting the build of a boat atm.
So reading as much as I can

Question now is:
I need a 12m mast
Can I shorten/refit a mast from another boat?
And if I can is it possible to for example relocate spreaders and co without loosing the integrity/strength of the mast?

Thanks

G
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Old 11-04-2015, 07:47   #2
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Re: Mast/Boom etc question

Oeps forgot. Aluminium deck stepped mast...
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Old 11-04-2015, 12:31   #3
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Re: Mast/Boom etc question

Do you know what your RM30 is? Do you know the moment for the section?

Yes it's possible to just cut a mast and reuse it, but it isn't wise. At least without knowing what the engineering says, and that changes boat to boat, mast to mast.
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Old 11-04-2015, 12:58   #4
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Re: Mast/Boom etc question

Quote:
Originally Posted by Stumble View Post
Do you know what your RM30 is? Do you know the moment for the section?

Yes it's possible to just cut a mast and reuse it, but it isn't wise. At least without knowing what the engineering says, and that changes boat to boat, mast to mast.
Thanks for the answer
I am new to this, and have been looking @ used masts for sale.
But figured it wasn't going to be an easy "plug and play" swap lol.
Guess the best and most prudent way is to go and have one build up from "the ground"
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Old 11-04-2015, 13:06   #5
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Re: Mast/Boom etc question

Yes you can but. Relocating spreaders requires some engineering. Some mast makers weld in compression tubes so would require some professional help to move. In any case there has to be some way for the mast to take the compressive loads of the spreader. There are different mast sections both in dimension and wall thickness. Determining if a used stick will work for sure would need doing some calculating which is way above my engineering skills. If you are cutting a stick down, it's probably going to be strong enough but that will mean extra weight aloft that you don't need. Countering a pound at the most head takes many more pounds in the keel. There are a lot of boats out there sailing with masts from other boats. If you do go that route better have a good idea or professional help on what you are doing. In the least, I'd get the advice of a experienced rigger and, to be absolutely safe, a few hours of a naval architects time.
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Old 11-04-2015, 13:26   #6
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Re: Mast/Boom etc question

The short answer is yes. If you have an engineering background its a simple set of calcs. If not its probably simpler to find a mast that fits your spec from a boat that is similar.

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