I have a beam of 6.6m length. 3 point loads of 35kN are acting at 1.65m c/c. Section modulus required is 615,790mm3, It means if we use Beam size of 500x4x150x8 (Section modulus = 761,697), it must pass with stress ratio of 0.808 (615,790 / 761,697). But designing in SAP for same beam and loading is...