Rectangular Tank Design with Horizontal Stiffening

Hi,
I just paid 90 USD for downloading this spreadsheet. It does not seem to help me.
I need to design a small rectangular water tank in SUS 304. Max pressure is 10 bar. Largest side is 1 m x 0.3 m. I need to find plate thickness and amount of stiffening required. Are you able to help me out?

Anybody know why Megyesy uses 0.3 in the thickness equation? I have the eleventh edition of book, maybe newer editions explain this?

I was excited to see your spreadsheet and I haven’t had a chance to go completely through it yet, but I plugged in some numbers to check it out. I applaud your work to ease the design process of designing rectangular tanks with horizontal stiffeners. There isn’t a lot of info out there on designing rectangular tanks, and some of it has questionable elements. Being an older engineer, I have been doing this type of design work for some time and have my own approach (based mostly on Roark’s equations) which isn’t too far off yours. In your spreadsheet, I question the values of the Reactions on each of the stiffeners as calculated. The sum of all the reactions including the top edge should equal the total load on the vertical wall per the same length unit. In my experience the lowest stiffener (not the bottom edge) usually has the greatest load. I use a standard engineering method for figuring the reactions that isn’t shown in texts on the rectangular subject. I do my calcs by hand which is time consuming since it is a back and forth game to get the best panel thickness verses width and height. Also tweaking the heights of multiple stiffeners to minimize the loads on them helps balance the design. I appreciate your efforts in this cause and would be open to sharing my thoughts and experience if you have any interest. Sincerely, Jestanks