Dears; The minimum steel ratio =0.0018 is for one face or for the 2 faces of the section (top & bottom)?? As far as I know that 0.0018 is for the face exposed to tension (not the 2 faces). Since the Mat suffers tension at top and bottom of the section at the same section so we provide 0.0018 for 2 faces . Am I right??? Regards