Stability Bracing of Beams (Required Strength at Plastic Hinge)

P_{r} = 0.06 \cdot R_{y} \cdot F_{y} \cdot Z / (α_{s} \cdot h_{o})

P_r	Required strength of the stability beam bracing at the plastic hinge location
R_y	Ratio of the expected yield stress to the specified minimum yield stress
F_y	Specified minimum yield stress
Z	Effective plastic section modulus of a section (or a connection) at the plastic hinge location
α_s	LRFD-ASD force level adjustment factor = 1.0 for LRFD and 1.5 for ASD
h_o	Distance between the flange centroid

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