design of rectangular tanks design of rectangular tanks rajeev383 (Mechanical) (OP) 2 Oct 16 00:04 Can any one please share the design calculation for rectangular tank with stiffeners . I need it urgently. Please help me to carry out the calculations RE: design of rectangular tanks JStephen (Mechanical) 2 Oct 16 18:26 Generally, the approach would use the rectangular flat-plate formulas in Roark's Formulas for Stress and Strain. Watch the maximum plate-deflection criteria. I believe there is a design guide for rectangular concrete tanks, but I am not familiar with the details of it. RE: design of rectangular tanks LittleInch (Petroleum) 3 Oct 16 08:32 Have you tried searching on this site for "rectangular tanks" Gems like this http://www.eng-tips.com/viewthread.cfm?qid=296117 come up which also link to other posts or try this https://www.scribd.com/document/183170386/Rectangu... Remember - More details = better answers Also: If you get a response it's polite to respond to it.