Use the Cross Section Selection page of the Structural Steel Wizard to specify the cross-sections in the model.
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Click Select Section ID.
The Section ID Selection dialog box displays.
The software defaults the Section ID to 1, but you can type a new ID.
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Expand the hierarchy as needed, select a cross-section and click OK.
You can also type a cross-section name in the NAME box.
You set the structural database for structural input in the Configuration Editor. See Structural Databases for more information on the delivered databases.
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Optionally, select User Defined? to create a custom cross-section. Type values for Area, Ixx (moment of inertia about the strong axis), Iyy (moment of inertia about the weak axis), J (torsion) (torsional resistivity constant), BoxH (overall height) and BoxW (overall width).
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Click Add Another Section if you need to define additional cross-sections.
The value for the Section ID increases by one.
Use the up and down arrows next to Add Another Section to scroll through all sections.
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Click Next.
The software displays the Model Definition Method Selection page of the Structural Steel Wizard.