# Support Lines

This section defines support line locations for abutments, piers, and temporary supports along the bridge alignment.

{% hint style="info" %}
**Navigation:** Bridge Geometry > Support Lines

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

## Steps

### Step 1: Navigate to Support Lines

Navigate to **Bridge Geometry > Support Lines** in the tree view.

![Navigation](https://openbrim.atlassian.net/wiki/download/attachments/2258599952/image-20230823-155004.png?api=v2)

### Step 2: Create End Bent Support Line

Click the **three-dots icon** on the first cell of Bridge and select **Bridge1**.

Set the station to **0 ft** for the first end bent location (Abut1).

### Step 3: Create Pier and Abutment Support Lines

Create support lines for the remaining permanent structures:

| Name  | Station |
| ----- | ------- |
| Abut1 | 0 ft    |
| Pier1 | 150 ft  |
| Pier2 | 300 ft  |
| Abut2 | 450 ft  |

![Support Lines](https://openbrim.atlassian.net/wiki/download/attachments/2258599952/image-20230823-155342.png?api=v2)

### Step 4: Add Temporary Support Lines

The permanent support lines are designated for End Bent and Pier Cap locations. Now add Temporary Support locations for sequential assembly of Girder Segments.

![Temporary Supports](https://openbrim.atlassian.net/wiki/download/attachments/2258599952/image-20230824-071611.png?api=v2)

Enter the names and stations for all Temporary Supports as shown.

### Step 5: Verify Skew and Offset

Confirm that support lines have no **Skew Angles** or **Transverse Offsets** for this example.

![No Skew](https://openbrim.atlassian.net/wiki/download/attachments/2258599952/image-20230824-071806.png?api=v2)

<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/2258599952/image-20230216-130246.png?api=v2)

</details>

## Verification

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

![Completed Support Lines](https://openbrim.atlassian.net/wiki/download/attachments/2258599952/image-20230824-072011.png?api=v2)