M. To add a notional load case
To add notional loads to a load case for use with direct analysis, use the following procedure.
Notional loads are lateral loads which are defined as a small percentage of gravity loads. Therefore, you must define your gravity loads in a separate reference load case (recommended) or primary load case before adding notional loads.
The notional loads are calculated as lateral loads applied to the joints in the selected global direct.
Tip: This will add the load item to the currently selected load group selected in the program status bar.
- Select the Two load lists are displayed. The first is a list of primary load cases which occur before the current primary load case and the second is a list of reference load definitions. tab.
- Type a Factor to use for the ratio of lateral to gravity loads for each load case added to the notional load. Typically, codes recommend 0.2 to 0.3 % (0.002 to 0.003). The default value will be the Notional Load Factor specified in the Direct Analysis Definition.
- Select the global Direction for each load case added to the notional load.
- Click Add.