STAAD Foundation Advanced Help

Load Combination page

Used to generate combinations of primary load cases for use in analysis and design.

Two types of load combinations are used:
  • Service Load Combination (i.e., allowable loads)
  • Ultimate Load Combination
You can create any number of load combinations.
SettingDescription
Load Combination Table Select either of the two code specified load combinations or input your own.
  • ASCE 7-05
  • PIP STC01015
  • User defined
Update Table Default load combinations are saved in external data files (ACILOAD.INI files). Clicking the Update Table button saves any changes made to the associated table to the file as a default. Otherwise, any changes are saved in the active project file only.
Delete Removes the selected row (load combination) from the associated table.
Note: To delete any combination from the default list (kept in an external .INI file) you need to click the Update Table button after deleting.
Allowable Load Combination and Ultimate Load Combination tables Each row in a table represents the ID for a different load combination.
  • LC No. – The Load Case number used to identify the load case. You can type a value or use the default. For service load combinations, the default starts with 101 and for ultimate load combinations, the default starts with 201.
  • Check Box - Set the check boxes of the combinations that you want to use.
  • SWF - The self-weight modification factor this combination which can be used to control the percent of foundation self weight considered in concrete checks.
  • SBF - The soil bearing factor which can be used to increase the soil bearing capacity (e.g., for seismic or wind loads).
  • Load Type columns - Primary Load cases are assigned a load type, each of which is represented by a separate column in the load combination tables. Type the load combination factor for a given load type in the cell.
    Tip: The cell with zero values appears in gray color where as with values other than zero it appears in blue.

To add a new load combination to the table, add factors to the last (empty) row.

Note: To add or change any combination from the default list (kept in an external .INI file) you need to click the Update Table button after making changes.
< Previous Steps the Wizard to the previous step.
Next > Proceeds the Wizard to the next step.
Cancel Exits the Wizard without creating a new Vertical Vessel Footing job.