# Girder Layout \[CUG]

A separate girder layout needs to be defined for each **continuous** girder.

## Layout

**Supports:** By clicking on the related cell and using the appearing three dots, the option ‘Pick…’ can be used to choose the needed insertion points for defining girder layouts (a minimum of 2 insertion points must be chosen).

{% hint style="warning" %}
Refer to this [page](https://docs.openbrim.org/examples/steel-bridge-examples/example-steel-i-girder-bridge-ex1-sig/bridge-geometry-ex1-sig/insertion-point-ex1-sig) to select the insertion points graphically if you are picking 3D objects for the first time. This step is often entered incorrectly by first-time users.
{% endhint %}

**Horizontal and Vertical Geometry \[Linear Btw Insertion Points/Use Alignment Btw Insertion Points]:** When you click on the related cell and then on the appearing three dots, the options ‘Set to Linear Between Insertion Points’ and ‘Set to Use Alignment Between Insertion Points’ should be visible. When ‘Set to Linear Between Insertion Points’ is chosen, the girder layout will be created as a straight line regardless of the alignment's shape. In contrast, when ‘Set to Use Alignment Between Insertion Points’ is chosen, the girder layout will be generated in sync with the defined alignment.

**Total Length (readonly):** Displays the total length of the girder layout between its start and end.

## 3D Settings

**Curve Refinement:** This does not impact any computations related to FEA; it solely affects how the Girder layout visualization is discretized for curves. A value of 100 represents the number of polylines that will be used between two insertion points. Therefore, using a larger value will result in a finer discretization of the 3D representation.


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