AD.2007-08.3.5.1 Belgian National Annex to Eurocode 3 (EN 1993-1-1:2005)

To specify a design using the Belgian NA to EC3, use the following procedure.

The Belgian National Annex document referred to is "NBN EN 1993-1-1:2005."

When the Belgian National Annex to EC3 is used for design, the output section title is revised to include the Belgian National Annex (National Annex to NBN-EN 1993-1-1). Additionally, the partial safety factors used are included in the output and are as specified in the Belgian NA. The value for C1 and k factors used in the calculation of the elastic critical moment are also included in the report.

Note: For additional information, please refer to D5.D.10 Belgian National Annex to EC3 and D5.C. European Codes - Steel Design to Eurocode 3 [EN 1993-1-1:2005] .

In the Modeling mode, select the Design | Steel tab. The Steel Design - Whole Structure dialog box opens.
In the Current Code drop-down menu, select EN 1993-1-1:2005.
Click Define Parameters…. The Design Parameters dialog box opens.
Select the NA parameter in the list box.
Select the option for (8) Belgium.
Click Add.
This will insert the following commands into the STAAD input file:
```
CODE EN 1993-1-1:2005
NA 8
```