~s~: Where you are heading is into the realm of PEs.
and asprin, bengay, mortin.....
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As to the structure being capable of handling the added weight...leave that to the Architect, or structural engineer types. And...good old common sense!
very true, being i'm not a structual anythingHotOne, i just thought a quick calc would get them interested enough to investigate
my impression is, nobody's considered it at all.....