I am designing a ring wall foundation for an above ground crude oil storage tank and i am using PIP STE03350 as a guide. I clearly understand Hoop Tension (and have been able to find that) and from example 2 in PIP, i do not necessarily have to design for Twist moment since my tank has the same specifications and environmental factors as that example. My challenge is: PIP does not exactly state the formula for vertical and horizontal minimum steel for temperature and shrinkage and API 650 does not state it precisely too... can anyone pls give me a detailed formula and steps of how to determine the minimum horizontal and vertical reinforcement for this? Urgent answers would be appreciated..
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