You can define additional lateral seismic loads for analysis models. The seismic loads are created in the x and y directions according to several building codes using a static equivalent approach.

1. On the Analysis & design tab, click A&D models.
2. In the Analysis & Design Models dialog, do one of the following:

   • To create a new seismic analysis model, click New.

   • To modify an existing analysis model, select the analysis model, and then click Properties.

   The Analysis Model Properties dialog opens.

3. On the Seismic tab:
   1. In the Type list, select the building code to be used in the seismic analysis to generate seismic loads.
   2. Define the seismic properties.
4. On the Seismic masses tab, define the loads and load groups to be included in the seismic analysis:
   1. To include the self-weight of parts, select the Include self weight as seismic mass checkbox.
   2. If needed, click Copy modal analysis masses to include the same load groups in the seismic analysis as in the modal analysis.
   3. To move the appropriate load groups to the Included load groups table, select them and use the arrow buttons.
   4. For each load group in the Included load groups table, enter a load factor.
5. Click OK.