> For the complete documentation index, see [llms.txt](https://gitbook.saf.guide/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gitbook.saf.guide/loads/structuralloadcombination.md).

# StructuralLoadCombination

## Load Combination

Object serves for definition a load combination. The combination is created from the existing load cases in the model, in [StructuralLoadCase](/loads/structuralloadcase.md#load-case) sheet.

### Specification in the excel

| Name of the column header | Type of data |                                                                                                                                                                             Value example or enum definition                                                                                                                                                                            | Required value                                        | Description                                                                                                                                                                                                                                                             |
| ------------------------- | ------------ | :-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------: | ----------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Name                      | String       |                                                                                                                                                                                           COM1                                                                                                                                                                                          | yes                                                   | Human readable unique name of the object                                                                                                                                                                                                                                |
| Description               | String       |                                                                                                                                                                                 varibale\_1 + dead load                                                                                                                                                                                 | no                                                    | The description of the load combination                                                                                                                                                                                                                                 |
| Category                  | Enum         |                                                                                                     <p>ULS (Ultimate Limit State)<br></p><p>SLS (Serviceability Limit State)<br></p><p>ALS (Accidental Limit State)<br></p><p>According national standard<br></p><p>Not defined</p>                                                                                                     | yes                                                   | The category of the load combination                                                                                                                                                                                                                                    |
| National standard         | Enum         | <p>EN-ULS(STR/GEO) Set B<br></p><p>EN-ULS (STR/GEO) Set C<br></p><p>EN-Accidental 1<br></p><p>EN-Accidental 2<br></p><p>EN-Seismic<br></p><p>EN-SLS</p><p>Characteristic<br></p><p>EN-SLS Frequent<br></p><p>EN-SLS Quasi-permanent<br></p><p>IBC-LRFD ultimate<br></p><p>IBC-ASD ultimate<br></p><p>IBC-ASD<br>serviceability<br></p><p>IBC-ASD seismic<br></p><p>IBC-LRFD seismic</p> | Yes, If Category =According national standard         | The National code application                                                                                                                                                                                                                                           |
| Load factor #             | double       |                                                                                                                                                                                           1,35                                                                                                                                                                                          | yes, If Category in not "According national standard" | Load factor of the load case. # means indexing of the Load factor column, e.g. Load factor 1, Load factor 2, … Load factor 99. It depends on how many load case is considered in combination.                                                                           |
| Multiplier #              | double       |                                                                                                                                                                                           0,9                                                                                                                                                                                           | yes                                                   | A multiplier for e.g. increase the selfweight of the structure . # means indexing of the Multiplier column, e.g. Multiplier 1, Multiplier 2, … Multiplier 99. It depends on how many load case is considered in combination.                                            |
| Load case name #          | String       |                                                                                                                                                                                           LC1                                                                                                                                                                                           | yes                                                   | Valid name of the load case ([StructuralLoadCase](/loads/structuralloadcase.md#load-case)). # means indexing of the load case name column, e.g. Load case name 1, Load case name 2, … load case name 99. It depends on how many load case is considered in combination. |
| Id                        | String       |                                                                                                                                                                           39f238a5-01d0-45cf-a2eb-958170fd4f39                                                                                                                                                                          | no                                                    | Unique attribute designation                                                                                                                                                                                                                                            |