...uh, like I said I was tired when I wrote that message - the final number should actually be 1704 p.s.f. because 21 sq. in. = 0.146 sq. ft.
So it's even worse. If you have a wood floor, don't support your stands with thin legs; use a plywood or 2x4 'sill plate' to distribute the load.
From: Andrew Faust [mailto:firstname.lastname@example.org]
Sent: Tuesday, August 17, 1999 10:33 PM
Subject: Re: Floor load capacities
.... if you've got a stand with 4 legs and they are 2x4's going straight
to the floor, you've got 4*(1.5)*(3.5) = 21 sq. in. of area. Divide that
into 250+ lbs (just a single 25gal tank) and you've got 142 p.s.f. at each
foot. Something to think about.