§8.2 Local Buckling

Only where specifically required by the specification and footnotes to table I-8-1 are the members checked against the limiting width to thickness rations of Table I-8-1 and LRFD Table B5.1.

Where applicable, Pu is taken as the maximum axial tension and compression force on the member from all the selected standard provision load combinations.

The calculation of the b/t, d/t, and h/t ratios are based on the AISC LRFD 3rd specification.

Note that for webs of beams in Special Moment Frames (SMF) there are some conflicting limits. The program will limit the section web to the smaller of:

and

§8.3 Column Strength

This provision is applied to all columns, irrespective of frame type. The standard provision load combinations are utilized to calculate Pu.

When Pu/ϕPn > 0.4 the amplified seismic load combinations generated in the seismic provision mode (see 4. above) are used to determine the required compressive and tensile strength.

The limiting provisions of 8.3(2) are not applied which could result in conservative axial forces being considered in 8.3(1).

§8.4 Column Splices

Detailing information regarding the magnitude of the required splice force to be designed and detailed are calculated and presented. The engineer is responsible for the design of the splice connection components.

§8.4 Column Bases

No calculations or information is provided with respect to column base design. Refer to the specification for additional information or requirements.