> 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/structuralcurveactionfree.md).

# StructuralCurveActionFree

## Free line force

The Free line load is related to slabs. The load is not defined by the entity it acts on, but by a specific load border. Free loads are defined by means of "loading entities" that may overlap or affect one or more slabs.

![](/files/PNQqH8TzK0HJvLMi8FeZ)

### Specification in the excel:

| Name of the column header | Type of data |          Value example or enum definition         | Required value                                                          | Description                                                                                                                                                                                              |
| ------------------------- | ------------ | :-----------------------------------------------: | ----------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Name                      | String       |                        LF5                        | yes                                                                     | Human readable unique name of the force                                                                                                                                                                  |
| Type                      | String       |                      Standard                     | no                                                                      | This property defines what the load is caused by, E.g. Standard, Wind, Snow, Self weight, Hoar Frost, Predefined, Plane Load, Water Pond, Water Pressure, Soil Pressure, Generated Water, Generated Soil |
| Distribution              | Enum         |            <p>Uniform</p><p>Trapez</p>            | yes                                                                     | The load may be either constant along its length or linearly variable (trapezoidal).                                                                                                                     |
| Direction                 | Enum         |       <p>X</p><p>Y</p><p>Z</p><p>Vector</p>       | yes                                                                     | <p>Specifies the base direction of the load</p><p>X, Y, Z - action will be applied in one of these directions</p><p>Vector - size and direction calculated from vector</p>                               |
| Value 1 \[kN/m]           | Double       |                        -150                       | yes, if Direction = X,Y or Z                                            | Specifies the first size of the load in kiloNewtons per meter                                                                                                                                            |
| Value 2 \[kN/m]           | Double       |                        -180                       | <p>yes, if Direction = X,Y or Z</p><p>yes, if Dsitribution = Trapez</p> | Specifies the second size of the load in kiloNewtons per meter                                                                                                                                           |
| Vector 1(X;Y;Z) \[kN/m]   | String       |                     (10;10;0)                     | yes, if Direction = Vector                                              | <p>Specifies the first size of the load in, direction by vector</p><p>Note: Vector1 and Vector2 needs to be in same direction</p>                                                                        |
| Vector 2(X;Y;Z) \[kN/m]   | String       |                     (20;20;0)                     | <p>yes, if Direction = Vector</p><p>yes, if Dsitribution = Trapez</p>   | <p>Specifies the second size of the load in, direction by vector</p><p>Note: Vector1 and Vector2 needs to be in same direction</p>                                                                       |
| Load case                 | String       |                        LC1                        | yes                                                                     | The name of the load case to which the force belongs                                                                                                                                                     |
| Coordinate X \[m]         | String       |            0.000; 2.050; 4.850; -2.000            | yes                                                                     | The list of X coordinates of the nodes which define the geometry of the line free load. Each coordinate is separated by semicolon and space.                                                             |
| Coordinate Y \[m]         | String       |            0.500; 1.050; 2.650; -1.500            | yes                                                                     | The list of Y coordinates of the nodes which define the geometry of the line free load. Each coordinate is separated by semicolon and space.                                                             |
| Coordinate Z \[m]         | String       |             0.000; 0.000; 0.000; 0.000            | yes                                                                     | The list of Z coordinates of the nodes which define the geometry of the line free load. Each coordinate is separated by semicolon and space.                                                             |
| Segments                  | String       | Line; Circular Arc; Bezier; Parabolic arc; Spline | yes                                                                     | List of the shape of each segment which is part of the curve, separated by semicolon if there are multiple                                                                                               |
| Coordinate system         | Enum         |             <p>Global</p><p>Local</p>             | yes                                                                     | Defines co-ordinate system of the member in which the load is applied                                                                                                                                    |
| Location                  | Enum         |           <p>Length</p><p>Projection</p>          | yes                                                                     | Specifies whether the load is "put directly on an inclined 1D member" or whether the "projection on plan" is defined.                                                                                    |
| Id                        | String       |        39f238a5-01d0-45cf-a2eb-958170fd4f39       | no                                                                      | Unique attribute designation                                                                                                                                                                             |