> For the complete documentation index, see [llms.txt](https://manual.karamba3d.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://manual.karamba3d.com/3-in-depth-component-reference/3.6-results/3.7.1-general-results/3.6.5-reaction-forces.md).

# 3.7.1.7 Reaction Forces

<figure><img src="/files/jwseacbkdOBa6G7ZYhVS" alt=""><figcaption><p>Fig. 3.7.6.1: Reaction forces and moments for two load-cases</p></figcaption></figure>

The **“Reaction Forces”**-component gives retrieves the support forces and moments. It expects a model at its input-plug and returns via **“RF”** and **“RM”** a data tree containing reaction forces in $$kN$$ and reaction moments in $$kN m$$ as three-dimensional vectors. The **“RF”** and **“RF”** refer to the coordinate system defined at the corresponding support. By default, it is the global one.\
The outermost branches of **"RF"** and **"RM"** contain the results according to the current selection.&#x20;

Specific supports can be selected via the **"Pos|Inds"**-input: either specify node indexes or positions. In case no input is provided, results for all supports will be output. The order of position- and index-input determines the order of result outpu&#x74;**.**

The input-plug **“LCase”** sets the selection for retrieving results. In fig. 3.7.6.1. "LCC/min/max" selects the minimum and maximum envelope of support reactions of load-case-combination "LCC".  Via the radio buttons of the "For Supports"-menu of the "Result Selection"-component one can select the principal support component for which to retrieve the accompanying ones.&#x20;

**“Pos”** returns the position of the supports in the same order as the results. **“SumRF”** and **“SumRM”** offer the possibility to check the resultant reaction moments and forces of the **"RF"** and **"RM"**-output.

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