Quote:
Originally Posted by Black Phantom
You don't need to beef up a basement as it's concrete but upper floors are another matter.
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Yep.
The foundation is the walls (with a thicker "footing" at the base), and is not what you are concerned about if you are putting a tank in the basement. A basement floor made of concrete (cement is the stuff in a bag) from that era has a minimum of 2" thickness, but usually 3"+. The concrete has to be poured on undisturbed soil
or tamped soil (that's a whole 'nother subject tho). So the soil underneath is very firm. The combinatin of the firm soil and the concrete creates a very strong floor, and if in good condition (no large cracks) wouldn't need any sort of reinforcement. Now, if your tank is like 500+ gallons then you may need to pour a second layer of concrete over top of the existing floor.
On a ground level floor (even if only one storey) or higher then beefing up may be necessary.