mrwrick wrote:

"I am putting in a water storage tank of 3000 gallons, roughly 26000 pounds full, including tank weight. Dimensions for tank are 8 feet diameter, 9 feet tall, round tank with some concavity in base, thick rim is area of most consistent contact. How thick should my concrete slab be and how to configure the rebar? Thanks"

Answer:

What is it with water tanks? For some reason I get this question with minor variations about 6 times per year. I have a feeling some tank installation company has found a hole in our “system.” Sorry, buds… we are happy to give some advice but I think we are done being your free engineering consultant!