Glad to see this site up and running so quickly, pretty amazing. I recently purchased a 1976 elite hull to refurbish, someone gave me 2 sheets of 1/2" coosa board with red markings, never used the stuff. All my experience is with okoume or meranti, can some one school me on its use. I’ve made a console so far that seems strong enough but was going to add a front casting deck, stuff doesn’t seem to be very structurally sound. maybe this is not the right product for a deck, wondering how wide a span I can do, I’ll be using epoxy and glassing both sides, any info appreciated.
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It’s generally used in Transoms or areas where screw retention is desired, such as trolling motor mounting. In these cases the deck will be primarily a Divinny or similar foam, with a section of coosa, where the TM would mount.
It’s rarely used for whole decks or soles due to its weight.
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Welcome aboard @arace Glad to have you join us.
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Coosa along with various other “foam” type cores help create the structure along with resin type and fiber loading. In many “wood” builds the wood provides the structure and resin/fiber seal the wood.
For a console, a single layer/maybe 2 of 1.5oz csm would likely suffice over say 15lb coosa, but for a casting deck one may require a layer or two of 12oz biaxial or 17oz biaxial or even some added support stringers on the bottom side depending on span and load.
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thank you @zika, under my avatar my name was andy race on the MS forum, need to create a new one, also thanks for info @jcdesigns and @mikecockman
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What JC wrote. When you add a skin of glass your coosa will stiffen right up. Hmm… that sounds a little wrong.
Seriously, if you have enough 1/2 “, you can double it up. Twice the thickness = 4X stiffness. More or less.