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There is a product called Thermo-Lite which is probably what you want. it's available in a sheet/board form and it contains a closed cell foam with fiberglass reinforcement. It's incredibly nasty to work with (fiberglass dust) and it isn't terribly strong, but it's leagues ahead of any type of foam insulation board that has been suggested. I work in the ...


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Practically speaking, SIPs are about it. Sounds like you might be thinking of some of the hopeful but largely unrealized press releases for autoclaved concrete or foamcrete (two different products, both with VERY limited practical availability despite nice websites and articles) though the "dimensional lumber sizing" aspect does not fit with that.


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Lots of things are better insulators than wood. Most of them aren't strong enough to be structural, or not better enough at insulating to bother, since generally people insulate with insulation materials that are designed to be good at that. If the thing you're describing existed, people would almost certainly build houses out of it instead of wood, unless ...


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Hm, wouldn't furring strips look odd? Why not use heavy duty wall anchors (10 lbs. is not a lot, but just to be safe since it's a glass mirror) or toggle bolts? You could hide those behind the mounting hardware.


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This really needs to be looked at by a structural engineer, or similar qualified person, to give you a load bearing range. To calculate the load one would need to factor in the size of the wood, the type of the wood, condition of the wood (rot, ...) the overall weight of the structure, and how it is secured to the structure. I can speak from experience ...


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Its unlikely you can remove those walls. In any case, would you really start knocking down walls in your house based on what random people on a forum wrote?


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It can be kind of hard to tell from photos. Your house plans (blueprints) would tell you for sure, presuming the house was built faithfully to the plans. You really should have a good look at the plans, or get somebody knowledgeable to look at this in person. Or both. Do you know which direction the joists are running? Floor and ceiling joists will be ...


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How are you joining these 2x12's? Who has done the load and deflection calculations to ensure that a 3.5" x 11.5" x 40' wood beam can handle the load you want to put on it? What kind of load are you expecting the finished deck to hold? Is this thing up in the air, or close to the ground? You've considered that your finished beam is going to weigh ...



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