Structural support in the floor? There are people that weigh more than this. It’s only 20 gallons
Also steel is completely unnecessary unless you're doing something wild like that guy in NYC with a 17,000 gallon home aquarium. If you're just throwing a 200 gallon or so on a second floor, an enginer might not care at all if its across the joists or has a wall below it, but even if its completely open below, the "support" might just be a joist of a different design, or an inch thicker or one extra joist. Steel is really not nessecary
The Pfizer building in NYC almost collapsed after they tried to build a swimming pool on the roof. This happens semi-regularly when building owners ignore, or don't consult, engineers about rooftop swimming pools. Every owner wants one and doesn't want to be told no.
I dont think they got to the pools. I worked for a company that did a bid for the electrical work. Edit: there was a pool. Didnt have on plans at time
Second edit: looking at wrong plan. There was a pool but it was basically a blank plan with annunderdesigned roof.
If anyone wants to read more about this: https://en.wikipedia.org/wiki/Pfizer_Building#Structural_det...
> This happens semi-regularly when building owners ignore, or don't consult, engineers about rooftop swimming pools.