Determining floor/joist weight capacity

[newreefer_59]

The drawing I made is to scale, and no, I cannot move the tank any further so that the double joist is in the middle

What the drawing does not show is the 2 joists drawn that sit on the outside concrete wall actually extend about 2 feet farther out as the house juts out there - originally intended for a dining room.

The beams are wood and unsure of the designation, but could check.