Re: Marine Plywood
APA gradestamped plywood under various product standards, including PS1-83 and 1-95.<br /><br />I suppose, although I have never heard of it, that US Plywood in the olden days (1960's or so or before) had a proprietary way of laminating it, but I cannot even imagine how they would have technically done it. US Plywood corp became Champion Intl back in the mid to late 70's or so, and there are no Champion mills that have made marine grade in many years.<br /><br />I should say that I refer to US Produced marine grade from west coast Douglas Fir mills under US product standards (PS 1-95). I guarantee that none of it is layed up at 45 deg angles.<br /><br />The vast majority of marine grade these days comes from SE Asian producers, or African veneers produced in various overseas producers, including Israel, I don't know how much of it is sold over here, but I have seen videos of many overseas mill operations, and toured mills in Europe and Japan. There is not a one of them that has the capability in any sort of productive fashion to lay up plywood in any manner other than a standard 90 degree orientation.
