Designing members per a building code as specified for this tutorial require you to provide values for some of the terms where the default values do not match the problem requirements.

PARAMETER
CODE AISC UNIFIED 2010
FYLD 7200 ALL
TRACK 2 MEMB 2 3
UNB 10.0 MEMB 2 3
UNT 10.0 MEMB 2 3
SELECT MEMB 2 3

1. On the Analysis and Design ribbon tab, select Steel in the Design Commands gallery.
   
2. In the Steel Design - Whole Structure dialog, select AISC 360-10 in the Current Code list.
   
3. In the Steel Design - Whole Structure dialog, click Define Parameters. The Design Parameters dialog opens.
4. Specify the yield strength parameter:
   1. Select the FYLD parameter tab.
      
   2. Type 7200 (kip/ft²) [50 (kip/in²)]in the Yield strength of steel field.
      Tip: This equates to a 50 ksi steel, which is the common strength for American wide flange shapes. You can change the input units before and after this command to use inches for convenience, but this tutorial uses a non-standard unit here for brevity.
   3. Click Add. The parameter list is added to the list of commands in the Steel Design - Whole Structure dialog, including the selected design code and the yield strength value.
5. To define the remaining parameters, repeat step 4 except for selecting the parameters and providing the values listed below.

   Parameter	Value
   TRACK	2 (select the option)
   UNB	10 (ft) [120 (in)]
   UNT	10 (ft) [120 (in)]

6. Click Close in the Design Parameters dialog.
   Note: The steel design parameters are all marked with an icon. This indicates that they need to be assigned to steel members.
7. Assign the yield strength to all members:
   1. Select the FYLD 7200 parameter in the command list.
   2. Select the Assign to View option in the Assignment Method group.
   3. Click Assign. A dialog opens confirming you want to assign to the view (all members currently displayed in the view window).
   4. Click Yes.
8. Assign the output detail (TRACK) parameter to members 2 and 3:
   1. Select the TRACK 2 parameter in the command list.
   2. Select the Use Cursor to Assign option in the Assignment Method group.
   3. Click Assign. The mouse pointer changes to a .
   4. Click on each member in the Frame.
   5. Click on Assigning to stop assigning design parameters.
9. Repeat step 8 to assign the other two parameters (UNB and UNT) to members 2 and 3, as well.
   

   The Steel Design - Whole Structure dialog after the design parameters have been added and assigned

10. Add a command to instruct select sizes for members 2 and 3:

    The select command is an instruction to the program to assign the least-weight cross-section which satisfies all the code requirements for the member.

    1. In the Steel Design - Whole Structure dialog, click Commands.

       The Design Commands dialog opens.

    2. Select the Select tab.
       
    3. Click Add.
    4. Click Close.
11. Assign the select command to members 2 and 3:
    1. Select the SELECT parameter in the command list.
    2. Select the Assign to Edit List option in the Assignment Method group.
    3. Type 2 3 in the list. Notice this is a space-separated list of member numbers.
    4. Click Assign.
    Tip: You may also use either the method of selecting the members first or using the cursor to assign the command to the members.