Column Design
Substructure uses all combinations generated during the analysis for column design.
Note: If you select the Moment Magnification method (by selecting the Consider MM check box on the Column screen), you must further select if the column is braced or unbraced.
Only the axial force and moments in the global X and Z-direction are used for the column design. A moment interaction diagram is constructed for each combination. The capacity of a column is determined by the method described on page A2-27 in the manual. The critical combination is chosen from the computed minimum ratio of (pMn/Mu) of all combinations. When a column is designed for a hammerhead pier, the column section for the top of the column is the section at the bottom of the cap part.