The "wind profile area" is the projected area of the tank. For the tank shell this is simply the diameter * shell height. The projected area of the roof varies, based on the type of roof. (For a cone roof the area would be 1/2 * diameter * roof height. I'm not near the source code right now, and I don't remember the equations for the dome and umbrella roof areas.)
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Regards,
Richard Ay - Consultant