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Now, any idea what the floor material is? It feels like plywood, but I haven't confirmed. Is plywood an aeroelastic material? I'm not sure, though I guess Howard Hughes did build the Spruce Goose out of plywood ...
The real problem that I see is that the flex has gotten progressively worse. In the beginning, it was just kinda bouncy - not too bad. But as time went on, it got to the point where it now flexes right down until it rests on the floor underneath it. Although this is a self-limiting situation, I guess, it still suggests material failure to me.
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I'll hope to get at this project in the next couple of weeks, and will report back. Meanwhile, thanks again.
Bill
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Floor material looks like plywood sandwiched with sheet metal. Mine flexes reasonably, showing no signs of being marginal. Since we have the same unit, yr & model, it seems you may have been (as you suggest) unlucky to have had faulty material(s) used in construction of that area.
I'd think a call to TM is in order . Mike Hulsey is probaly the guy to check into it and get a response from the engineer(s).
Good Luck
Denny_A