Formulas: general provisions

Equation F1-1

The lateral-torsional buckling modification factor, $C_{b}$, for nonuniform moment diagrams when both ends of the segment are braced is determined as follows:

where

• $\begin{aligned} M_{\max } & =\text { absolute value of maximum moment in the unbraced segment, kip-in. } \\ & \text { (N-mm) }\end{aligned}$
• $\begin{aligned} M_{A} & =\text { absolute value of moment at quarter point of the unbraced segment, } \\ & \text { kip-in. (N-mm) }\end{aligned}$
• $\begin{aligned} M_{B} & =\text { absolute value of moment at centerline of the unbraced segment, kip- } \\ & \text { in. (N-mm) }\end{aligned}$
• $\begin{aligned} M_{C} & =\text { absolute value of moment at three-quarter point of the unbraced segment, kip-in. (N-mm) }\end{aligned}$

Found in

• GENERAL PROVISIONS