I must have remembered the weight of water wrong.
At 8.5lbs per gallon this stand is holding up 680lbs of water.
Mine is holding a revised 2500lbs of water.
It's still prety darn heavy.
The main thing to remember is tortional stiffness.
I've seen a few DIY stands that can more than hold the weight,
however if sideways force is applied (someone leaning on it) then they about crumble.
(unlike this one

)