Well that is a short question with a long answer that varies considering what you want to do. I wouldn't consider anything less than 3/4 and how strong depends on the amount of glass you put on it. I will be using it exclusively on my next build using it for decks, cap and gunnels. As for how my current sled is raised, it was done with plywood on a web of pt 2x4s and glassed in. I will document how my project boat is done but we are a ways from that.
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[b]The Moose is Loose !
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