said by boogi man:
the weight of the whole operation will not be spread evenly but through the points of contact from the stand. assuming 2x4 legs gives you roughly 21sq inches
The OP said, "The stand I'm getting would distribute the load across the entire 48" length of the tank (as opposed to one with just four legs)."
I misread that as indicating a platform base, i.e. a plane distributing the load uniformly over the entire area of the base.
Let's guess that the stand is made of 3/4" something-or-other and that this stuff forms a perimeter base with no cross-supports in the center.
48" + 48" + 12" + 12" = 120" perimeter
120" * 0.75" = 90 sq in
650 lb. / 90 sq in = 7.2 psi
I doubt that's much of a concern and at this point it's probably academic anyway.--
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