We are in the process of repairing a storage tank. We added a secondary floor and trimmed the columns to suit. So we have new floor plate and new column bearing plates. API 653 has rules regarding minimum overlap for patches on a tank floor. A question came up re: overlap of the bearing plates, and whether we need to adhere to the same minimum overlap criteria. Since this is new floor plate and new bearing plates it seems reasonable to look to the API 650 code, but this code does not address this issue (as far as I can tell).
Is there guidance for overlap of column bearing plates with new construction?
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