Using the dimensions you have mentioned,
Iy of the larger flange = 288, Iy of the smaller flange = 18, Iy of the web = 2
So, if the larger flange is in flexural compression, (Iyc/Iy) = 288/(288+2+18) = 0.935
If the smaller flange is in flexural compression, (Iyc/Iy) = 18/(288+2+18) = 0.058
Thus, in both cases, the design will go through H2-1. Are you saying that it should not?
If a cross section is rotated by any beta angle, the axes rotate with the section. In other words, the basic definition of the local Z axis for BETA=0 does not differ from the local Z axis for BETA=90, and happens to be the line that parallel to the web and perpendicular to the flanges. Beta 90 will cause the magnitude of the strong and weak axis moments to change from Beta=0. If MZ is non-zero, the rules of Chapter H will still be applied using the same principles as those used when beta=0.
Iy of the larger flange = 288, Iy of the smaller flange = 18, Iy of the web = 2
So, if the larger flange is in flexural compression, (Iyc/Iy) = 288/(288+2+18) = 0.935
If the smaller flange is in flexural compression, (Iyc/Iy) = 18/(288+2+18) = 0.058
Thus, in both cases, the design will go through H2-1. Are you saying that it should not?
If a cross section is rotated by any beta angle, the axes rotate with the section. In other words, the basic definition of the local Z axis for BETA=0 does not differ from the local Z axis for BETA=90, and happens to be the line that parallel to the web and perpendicular to the flanges. Beta 90 will cause the magnitude of the strong and weak axis moments to change from Beta=0. If MZ is non-zero, the rules of Chapter H will still be applied using the same principles as those used when beta=0.