To satisfy the column’s rectangle expand foundation’ s punching checking requirements in the specification, usually assume a expand foundation’s height , then use the formula to check it, if not suitable, we have to try again until it’s ok;through the analysis the author thinks that the column’s rectangle expand foundation’ minimum height can be solved with a direct method which can satisfy the punching checking requirements, all the value that bigger than the minimum height can satisfy the punching checking requ...
