> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ntop.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Reaction Force Response

Create a design response that measures the sum of reaction force vectors across a boundary. The response is derived from the solution of a linear static structural finite element analysis.

### Inputs

| Name      | Type                                                                                | Description                                                                                                                                                                                                                                                                                                                                                                                            |
| --------- | ----------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| Boundary  | [Boundary](../../../../block-documentation/types/boundary)                          | Boundary that the design response will be computed on.                                                                                                                                                                                                                                                                                                                                                 |
| Load case | [Boundary Condition List](../../../../block-documentation/types/boundary-condition) | Load case for the design response.                                                                                                                                                                                                                                                                                                                                                                     |
| Direction | Direction Component Enum                                                            | Operation that will be applied after summing all reaction force vectors over the Boundary input. \|X\| will compute the magnitude of the reaction force vector projected onto the X-axis, \|XY\| will compute the magnitude of the reaction force vector projected onto the plane spanned by the X-axis and Y-axis, and \|XYZ\| will compute the magnitude of the non-projected reaction force vector. |
| Frame     | [Frame](../../../../block-documentation/types/frame)                                | Reference frame that the reaction force will be computed in. If a frame is not specified, the global coordinate system will be used.                                                                                                                                                                                                                                                                   |

### Outputs

| Type                                                                     |
| ------------------------------------------------------------------------ |
| [Design Response](../../../../block-documentation/types/design-response) |