> 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/examples/concrete-bridge-examples/example-concrete-u-girder-bridge/bridge-geometry-ex1-cug/insertion-point-ex1-cug.md).

# Insertion Point

This section defines insertion points that position U-girders along each support line.

{% hint style="info" %}
**Navigation:** Bridge Geometry > Insertion Point

For detailed parameter explanations, see the [Insertion Point Reference](https://docs.openbrim.org/templates/concrete-u-girder-bridge-workflow/bridge-geometry-cug/insertion-point-cug).
{% endhint %}

## Steps

### Step 1: Navigate to Insertion Point

Navigate to **Bridge Geometry > Insertion Point** in the tree view.

![Navigation](https://openbrim.atlassian.net/wiki/download/attachments/2258665474/image-20230824-090250.png?api=v2)

### Step 2: Create First Insertion Point

Click the **three-dots icon** on the first cell of Location and select **Select**.

From the dropdown menu, choose **SL1** (support line for End Bent location).

![Select Support Line](https://openbrim.atlassian.net/wiki/download/attachments/2258665474/image-20230824-090458.png?api=v2)

### Step 3: Plan Insertion Points

For each support line, create one insertion point beneath each Concrete U Girder.

Since there are two U-girders in this project, there will be two insertion points on each support line.

![Insertion Point Layout](https://openbrim.atlassian.net/wiki/download/attachments/2258665474/image-20230824-111639.png?api=v2)

### Step 4: Set Transverse Offsets

Enter **Transverse Offset** values of **-12 ft** and **+12 ft** to position the insertion points on each support line.

![Transverse Offset](https://openbrim.atlassian.net/wiki/download/attachments/2258665474/image-20230824-112310.png?api=v2)

### Step 5: Create Remaining Insertion Points

Repeat the process to create insertion points for all support lines with their respective transverse offset values.

<details>

<summary><strong>Quick Tip:</strong> Transverse Offset Direction</summary>

Offset values use PGL (Profile Grade Line) as the reference point.

![Offset Direction](https://openbrim.atlassian.net/wiki/download/attachments/2104689432/image-20230216-130246.png?api=v2)

</details>

<details>

<summary><strong>Quick Tip:</strong> Skew Angle and Offset Calculation</summary>

![Skew Calculation](https://openbrim.atlassian.net/wiki/download/attachments/2258665474/image-20230216-140820.png?api=v2)

![Offset Calculation](https://openbrim.atlassian.net/wiki/download/attachments/2258665474/image-20230216-141049.png?api=v2)

</details>

## Verification

{% hint style="success" %}
After completing these steps, the insertion point layout should appear as shown below.
{% endhint %}

![Completed Insertion Points](https://openbrim.atlassian.net/wiki/download/attachments/2258665474/image-20230824-112600.png?api=v2)


---

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