3.20 A rectangular section with b=14 in. and effective depth d=21.5 in. has 4-#10 as tension reinforcement and 2-#10 as compression reinforcement centered 2.5 in. from the face of the beam. Determine the strength M, for this section. How much can the strength be increased by adding tension steel only when governed by ACI-10.3? At the point where compression steel is needed to further increase strength, what ratio of A to A, would be required to be added? Use f: = 5000 psi andf, = 60,000 psi (b=350 mm;d=546 mm; tension steel, 4-#30M; compression steel, 2-#30M centered 63.5 mm from face; f. = 35 MPa;f;= 400 MPa). 3.20 A rectangular section with b=14 in. and effective depth d=21.5 in. has 4-#10 as tension reinforcement and 2-#10 as compression reinforcement centered 2.5 in. from the face of the beam. Determine the strength M, for this section. How much can the strength be increased by adding tension steel only when governed by ACI-10.3? At the point where compression steel is needed to further increase strength, what ratio of A to A, would be required to be added? Use f: = 5000 psi andf, = 60,000 psi (b=350 mm;d=546 mm; tension steel, 4-#30M; compression steel, 2-#30M centered 63.5 mm from face; f. = 35 MPa;f;= 400 MPa)