65 gal on 2nd floor question

[Abbyreefer]

I was thinking about putting my new 65 gal tank (36x18x24high) upstairs only hitch is I'm not sure if the weight will be ok or not. If I'm lucky it will hit 2 joists but quite possible it will only hit 1 as the tank will be runing same way as the joists are. Would the weight of the tank, rock (70#) sand (80#) and water plus a 20 gal sump and 10 gal refug be ok or would will I find the tank on the main floor one day ?