The required strength of an element is automatically obtained by ideCAD Structural according to Table A3.1.
Ry = Ratio of the expected yield stress to the specified minimum yield stress, Fy
Rt = Ratio of the expected tensile strength to the specified minimum tensile strength, Fu
A3.2 Expected Material Strength
According to AISC 341-16, to determine the nominal strength, Rn, for limit states within a member or a connection of a member from which the required strength is determined, the expected yield stress, RyFy, and the expected tensile strength, RtFu, are permitted to be used in lieu of Fy and Fu, respectively.