> For the complete documentation index, see [llms.txt](https://docs.openbrim.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.openbrim.org/templates/steel-i-girder-bridge-workflow/loading-sig/loads-sig/static-loads-sig/line-load-sig.md).

# Line Load \[SIG]

## General

**Line:** User must choose the line that was defined beforehand.

**Stage:** Choose the stage at which to apply the load.

**Fx:** Force in the longitudinal direction along the PGL.

**Fy:** Force in the direction perpendicular to the PGL.

**Fz (Gravity):** Force in the vertical direction. A positive value indicates a load in the global -Z or gravity direction. For usual loads(wearing surface loads - stay-in-place formwork loads), the user should input positive values.

**Mx:** Moment in the longitudinal direction along the PGL.

**My:** Moment in the direction perpendicular to the PGL.

**Mz:** Moment in the vertical direction.

{% hint style="info" %}
Although **Fz** is applied in the direction of gravity (positive values for **Fz** will correspond to the downward direction, as with gravity), **Mz** will have a positive direction relative to the **+Z** axis or, in other words, in the upward direction.
{% endhint %}

**Element \[Girder Top Flange/Girder Bottom Flange/Deck/Foundation/Pier Cap and Bents]:** OpenBrIM distributes the defined line loads to the chosen element nodes.

![](https://openbrim.atlassian.net/wiki/download/attachments/2125627431/image-20230814-155212.png?api=v2)


---

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