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M. To add weight items to a seismic load definition

To create structural weights for a seismic load definition, use the following procedure.

If you want to assign floor weights to a floor group, you must have at least one group of the type Floor previously defined to use this option.
Tip: If you want to use the same loads for both seismic weights and another load (e.g., the dead load case), you can use a Reference Load case instead of this procedure.
  1. In the Loads & Defintions dialog, select the seismic defintion to which you want to add weights and then click Add. The Add New: Seismic Definitions dialog opens.
  2. Select the tab in the Add New: Seismic Definitions dialog corresponding to the weight you want to add.
  3. Specify the weight parameters: For the following weight types, enter the data as indicated:
    Weight type Data to enter
    Self Type a Self Weight Factor
    Joint Type a Joint Weight
    Member Select the Loading Type. Type the Weight to use, the Starting Distance, and for uniform weights, the Ending Distance.
    Element Type a uniform Pressure
    For Floor Weights, do the following:
    1. Type a uniform floor Pressure.
    2. Select if the load is applied over a Range or a floor Group.
    3. (Optional) Check the One Way Distribution option to use that load distribution to supporting members. You can select the default behavior or select a specific member towards which the load is directed.
    4. For the Range option, specify Y range limits and optionally X and Z range limits.
    5. For the Group option, select a named group of members.
    6. (Optional) For the Group option, select the Inclined Floor option if the group includes members forming a panel that is inclined from the global XZ plane.
    Refer to TR.32.4.3 Floor Load Specification for additional details on specifying floor loads.
  4. Click Add.
  5. Repeat steps 1 through 3 to add additional weights to your seismic load definition.
  6. Click Close.
You must assign the weight items to the appropriate objects.