Dr. Mohammed E. Haque, P.E. Table_Haque_Reinf_Concrete Page 3 of 14 Table 4: Minimum and Maximum Steel Ratio fc' (psi) fy = 40000 psi 3000 0.0050 0.0278 4000 0.0050 0.0371 5000 0.0053 0.0437 6000 0.0058 0.0491 fy = 50000 psi 3000 0.0040 0.0206 4000 0.0040 0.0275 5000 0.0042 0.0324 6000 0.0046 0.0364 fy = 60000 psi 3000 0.0033 0.0160 4000 0.0033 0.0214 5000 0.0035 0.0252 6000 0.0039 0.0283 fy = 75000 psi 3000 0.0027 0.0116 4000 0.0027 0.0155 5000 0.0028 0.0183 6000 0.0031 0.0205 ρ min ρ max
