STAAD.Pro Help

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.
  1. Either:

    On the Loading ribbon tab, select the Load Items tool in the Loading Specifications group

    ヒント: This will add the load item to the currently selected load group selected in the program status bar.


    In the Load & Definition dialog, select a primary load case in the Load Cases Details list and then click Add.

    The Add New Load Items dialog opens.
  2. Select the Repeat Load > Notional Load tab. 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.
  3. Either:

    select a load case or reference load case on the right and click > to add it to the notional load


    click either >> to add either all of the load cases or reference loads to the notional load

  4. 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.
  5. Select the global Direction for each load case added to the notional load.
  6. Click Add.