# Pier Cap Line Load \[PIG]

Line loads for pier caps can be applied based on the definitions made using the parameters below.

## Pier Cap Load

**Pier Cap:** Choose the pier cap to impose the line load.

**Stage:** Select a stage to apply the load.

**Start Normalized Distance From Right (0-1)**: The relative distance where the line load starts must be specified with a value between 0 and 1, where 0 corresponds to the initial node of the selected pier cap, and 1 corresponds to the final node. The initial node is defined along the alignment direction, looking upstation (to the right in the standard view).

**End Normalized Distance From Right (0-1)**: The relative distance where the line load ends must be specified with a value between 0 and 1, where 0 corresponds to the initial node of the selected pier cap, and 1 corresponds to the final node. The initial node is defined along the alignment direction, looking upstation (to the right in the standard view).

**Fx**: Force in the X direction with respect to the global coordinate system.

**Fy**: Force in the Y direction with respect to the global coordinate system.

**Fz** (**Gravity**): Force in the Z direction with respect to the global coordinate system.

**Mx**: Moment in the global X-axis direction.

**My**: Moment in the global Y-axis direction.

**Mz**: Moment in the global Z 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.

**The Directions of Forces** See the figures provided below for further clarification on the directions of positive forces and moments. ![image-20250121-111920.png](https://openbrim.atlassian.net/wiki/download/attachments/2409103861/image-20250121-111920.png?api=v2) ![image-20250121-112057.png](https://openbrim.atlassian.net/wiki/download/attachments/2409103861/image-20250121-112057.png?api=v2) ![image-20250121-112220.png](https://openbrim.atlassian.net/wiki/download/attachments/2409103861/image-20250121-112220.png?api=v2)
{% endhint %}