Euro bracing calculator

[Stigigemla]

I am going to make a tank 9 foot 8 inches long, 24 inches high and 33 inches wide.
I would prefer a euro bracing in order to not have lamp shadows but how do I calculate it?
I dont want to know how you do euro bracing. I want to know how to calculate a bracing with safety factor 4.
I can do the mathematics so is there someone out there having a formula?

 

[Lovemyreef2015]

Bump

 

[Stigigemla]

Thanks for the help.

 

[Stigigemla]

New try. Anyone having an idea?