My worry is that you will have the footings of this steel frame, holding up 3000lbs and hiting the floor at almost exact midspan of the 2x10s. (provided im understanding your geometry correctly). At a 12'' spacing of those joists you can, at best, hope to split that load over 2-3 of them. On top of the 2 tanks you have there already, i personally wouldn't trust it. Sphelps may be able to comment better on the numbers side (don't have any refence books on hand) but my gut says dont do it.
If you can, I would say make sure there is a support (concrete ideally, or cinderblock) directly under where your stand footing hits the floor, and join the 2x10s together to prevent any torsion. (12'' pieces placed between them)
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12-01-2009, 07:42 PM
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