It are 3 HEA 140 beams. The the beams has 14cm of bearing surface. The total weight of the tank will be around 3000 kilograms. Zo each bearing surface will have to carry around 500 kilograms. I think that will be no problem.
Oh ok that gives me some ideas ...
You totally nailed it with the beams! Damn i think i hate you now, you did what i didnt dare to doNice start on this build! Those beams will give you sooo much space under that tank(was my idea aswell).. Dang, now i regret going with wood..You have the exact same measurements on the tank that i have, exept mine is 30cm higher, you can check it out "1200 gallon tank officialy started).
Those beams would cost a small fortune wouldn't they ?







