Load Combination Data Form

Program design is based on a set of loading combinations. In CSiBridge, load combinations, or combos, are generated automatically by the program or user defined. If the automatically generated load combinations are acceptable (note that these combos are added when the Design/Rating > Load Combinations > Add Defaults command is used), no definition of additional load combinations is required.  

Use the Advanced > Frame Design > {Steel or Concrete} > Select Design Combos command to work with automatic load combinations.

Use the Design/Rating > Load Combinations > New command to specify your own user combinations. The user-defined combinations can be created manually or based on a selected code, as described in this topic. This command can be used to convert automatic load combinations to user-defined combinations that can then be modified to meet specific needs.

Note:   The Advanced command must be used to select the user-defined combinations to be used in design, regardless of if the combos were created manually or if the combination(s) is based on code using the Analysis > Load Cases - All > Convert Combos command. The program automatically selects the automatic code-generated combos (generated after each design run).

Automatic and user-defined combination may be used simultaneously for design. Note that each time a design is run, the automatic combos are regenerated, thereby replacing any previous automatic combos. User-defined combinations (manual or based on code) are not changed during design. The Analysis > Load Cases - All  > Convert Combos command can be used to convert automatic code-generated combos to user-defined combos.

Note: Notional loads are not included in code-generated or automatic combinations. Thus, to consider the combination of notional and lateral loads, appropriate User Load Combinations should be generated.

Click the Design/Rating > Load Combinations > New command to display the Load Combination Data form and manually create a user-defined load combination for the model.

  1. Click the Design/Rating > Load Combinations > New command to display the Load Combination Data form and manually create a user-defined load combination for the model.

  2. Use the default or type another name in the Load Combination Name edit box. Note that each load combination and load case must have a unique name. Also, the word Mode is reserved and can not be used for either a load case name or a load combination name.

  3. Select the Load Combination Type:

  4. Select the appropriate action: