Formulas: Compression Flange Local Buckling

Equation F4-13

Equation F4-14

where

$\begin{aligned} F_{L} & \text { is defined in Equations F4-6a and F4-6b } \\ R_{p c} & \text { is the web plastification factor, determined by Equation F4-9a, F4-9b, or F4-10 } \\ k_{c} & =\frac{4}{\sqrt{h / t_{w}}} \text { and shall not be taken as less than } 0.35 \text { nor greater than } 0.76 \text { for cal- } \\ & \text { culation purposes } \\ \lambda & =\frac{b_{f c}}{2 t_{f c}}\end{aligned}$

$\lambda_{p f}=\lambda_{p}$, the limiting width-to-thickness ratio for a compact flange as defined in Table B4.1b

$\lambda_{r f}=\lambda_{r}$, the limiting width-to-thickness ratio for a noncompact flange as defined in Table B4.1b

Formula 3

$\lambda_{p f}=\lambda_{p}$, the limiting width-to-thickness ratio for a compact flange as defined in Table B4.1b

Formula 4

$\lambda_{r f}=\lambda_{r}$, the limiting width-to-thickness ratio for a noncompact flange as defined in Table B4.1b

Found in

• OTHER I-SHAPED MEMBERS WITH COMPACT OR NONCOMPACT WEBS BENT ABOUT THEIR MAJOR AXIS