1st time coosa board user

[martin]

Originally Posted by Jeff79Sceptre

Unfortunately, I only used it on one side. I really just mimicked the factory layup with the exception of the plywood. I figured I couldn't tab it underneath so why waste the epoxy and mat since there is really no weight in the center of the fuel tank. Most of the weight is closest to the stingers. I'll add some more 1708-6" toward the center from the stingers to help out. I did have Sunshine to weld some tabs for the new tank to keep from laterally moving but I know the will not help from vertical compression from slapping on waves. I can walk on the tank bed now but 800lbs of fuel may crush my layup method.

Yea Jeff that makes sense now. This coosa board , does it have roving glass inbedded in the foam.. if so I would recommend redoing your floor. 20lb desity will flex and crush over time. without the one side being laminated.. and when that happens the glass will fail on the tank side..I would cut out your board and glass the other side then cabosil epoxy it down then tab it in.. Also the glass that is not sealed will wick up moisture and fail..... I was told that you could just do one side as well. but it just made no sense to me ...Sorry for the bad news But this is one of the most important decks in the boat. this is just MHO. and you dont want your tank being supported by screws and alum tabs...or have to cut out your deck to do all over again...