Double-click the column (member no. 1) to open the 'Edit Member' dialog box. The settings are slightly different, as the stability of the column is to be verified additionally.
Concrete Cover
Select the Concrete Cover tab and make sure the '1.50 in' cover is set.
Shear Reinforcement
Select the Shear Reinforcement tab next.
In the 'Base Data' category, select type 3 - Grade 60 again from the list of materials.
The default settings of the stirrups (Bar size no. 3, s = 12.000 in) are suitable for the design.
Longitudinal Reinforcement
Select the Longitudinal Reinforcement tab.
Open the list of layout types in the 'Base Data' category. Select the C | Uniformly surrounding option (1). Next set the 3 - Grade 60 material again in the line below.
In the 'Rebar Parameters' category, enter (or select) 6 rebars in the 'ns' box (2). Bar size #6 is suitable for the design.
Concrete Effective Lengths
Finally, select the Concrete Effective Lengths tab to define the buckling parameters of the column.
Flexural buckling is only analyzed when the effective lengths of the member are defined. Click the
button in the 'Assignment' area to create a new type of effective length. Another dialog box opens.
By default, the buckling design is carried out for both principal axes of the unbraced member.
Select the Nodal Supports & Effective Lengths tab.
The column has pinned supports at both ends. It would be possible to reduce the buckling lengths because the column head is restrained by the slabs to a certain degree. For a conservative approach, however, unbraced settings with effective length factors k = 1.0 of a pin-ended column are to be applied.
Click OK to close the dialog box and return to the 'Concrete Effective Lengths' tab.
Having defined the design settings of the column, click OK to close the 'Edit Member' dialog box.