AISC 360 - Beam relative bracing

[901STR]

Looking at AISC 360-10, Appendix 6, 6.3 Beam Bracing (Relative Bracing).
We have equations A-6-5: Prb = 0.008*Mr*Cd/h0
And equation A-6-6: βbr = (1/Φ)*(4*Mr*Cd/Lb*h0).

h0 is defined as the distance between the flange centroids. But what if the beam you are bracing is not a W, S, or HP? what if you have a Tee or and Angle (L)? wWhat do you use for h0?

Thanks for any help.

 

[KootK]

In the development of the equations, Mr/h0 is just an approximation of the total compression force acting on the section. The equations treat the problem like an equivalent column. As such, you can estimate the total compression for your section and substitute that in for Mr/h0.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.