dimensioning minimum material around holes

I have to write the  Dimension of the minimum thickness of metal around the tapped holes in case of Minimum Material..

The 3d part already contain the tolerances.

I cannot find any automatic way to do it, not in the help nor in books. Is it possible to do it assisted by solidworks or I have to calculate it by Hand and then add as Note as in the pic?

SolidworksDrawings And Detailing