Flexural Buckling Members without Slender Elements per AISC 360-16 with ideCAD

How does ideCAD calculate the flexural buckling limit state for compression strength according to AISC 360-16?

Symbols

A_g : Gross cross-sectional area of member
F_cr : Critical stress
F_e : Elastic buckling stress determined according to Equation E3-4,
F_y : Specified minimum yield stress of the type of steel being used,
K : Effective length factor
L: Laterally unbraced length of the member
L_c : Effective length of the member, (= KL)
P_n : Nominal compressive strength, kips (N)
r : Radius of gyration

Flexural Buckling Members without Slender Elements §E3

This section applies to non slender-element compression members, as defined in AISC Section B4.1, for steel elements in axial compression.

The nominal compressive strength, P_n, is determined based on the limit state of flexural buckling:

The critical stress, F_cr, is determined as follows:

• When

• When