... kN/m2)[1.22 - a/2]As2- 2.45As + 0.02 = 0therefore,As = 430 mm2.Lecture #10The Design of Mat Foundations - Compensated mats- Rigid mats- Semi-rigid matsØ 1Ø 2 Ø 2Ø 3Ø 3Ø 4Ø 5Ø 5Ø ... 29” + 3” (min cover) + 1” (bar diameter) = 33 in24 in d/2d/224+d24+dd/2d/2Compensated mat foundations. If zero settlement is desired, the excavated soil weight will be equal to the weight...