500-liter accumulator tank, what is needed in the joist?

[zenobia]

Considering bringing in an Acc-tank of 500 liters and placing it next to my Nibe Fighter 310 P. What is required of the floor to support this weight? Should I tear up the floor and pour a concrete foundation? Is it enough to prop up from underneath? Perhaps tear up the floor and reinforce with more joists while also installing a new floor drain?

Or am I worrying unnecessarily and the floor can handle this without any problems?

Wood joist floor from the early '90s, crawl space foundation.

Any ideas and tips?

 

[zenobia]

The neighbor came over and solved the problem. A five-inch rule across the beam, supported by adjustable column shoes, fixed the issue.