STAAD.Pro Help

M. To add a surface selfweight load

To add a selfweight load for surface elements so the weight of the surface elements is included in the analysis of the structure, use the following procedure.

  1. Either:

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

    Tip: 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 Surface Loads > Selfweight Load tab.
  3. Select a global Direction for the selfweight. This is typically the "vertical" direction but can be any global direction.
  4. Type a Factor. This is multiplier on the calculated weight of the structure objects. You do not need to use a load factor for ultimate strength design here, as that is typically applied to load combinations.
    Note: A positive value will act in the positive global direction, so you will typically use a negative value here for gravity loads (-1 being the most commonly used value).
  5. Click Add. The load item is added to the selected load case.
The SSELFWT command, along with direction and factor, are added to the load case.
You must assign the load items to structure objects.