Determining floor/joist weight capacity

[hummer]

Originally Posted by sphelps

There's no doubt the floor will hold but what happens when you have a party and all your guests crowd around the one side?

My builder told me the floor is suppose to support a heavy load. But I got them to reenforce the joists under the tank just to be extra safe.
I have a 90Gal on Hardwood floors. I had a party last week and people were jumping around the tank. Playing some sort of pictionary type game. I saw the tank swaying. I had to stop them from jumping close to the tank cuz it probably would have tipped.