> 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/steel-bridge-examples/example-steel-tub-girder-bridge-ex1-stg/superstructure-ex1-stg/bracing-ex1-stg/lateral-bracing-ex1-stg.md).

# Lateral Bracing

This section defines horizontal lateral bracing in the top flange plane of the tub girders.

{% hint style="info" %}
**Navigation:** Superstructure > Bracing > Lateral Bracing

For detailed parameter explanations, see the [Lateral Bracing Reference](https://docs.openbrim.org/templates/steel-tub-girder-bridge-workflow/superstructure-stg/bracing-stg/lateral-bracing-stg).
{% endhint %}

## Steps

### Step 1: Navigate to Lateral Bracing

Navigate to **Bracing > Lateral Bracing** in the tree view.

![Lateral Bracing navigation](https://openbrim.atlassian.net/wiki/download/attachments/2169143322/image-20230220-125942.png?api=v2)

### Step 2: Assign Girder

Click the **three-dot icon** on the **Girder** cell and set **G1** to place bracing inside that girder.

### Step 3: Define Bracing Stations

Enter **Left Web Station** and **Right Web Station** values (along PGL):

* Example for LB1: Left Web Station = 3 ft, Right Web Station = 10 ft

![Station input](https://openbrim.atlassian.net/wiki/download/attachments/2169143322/image-20230220-131052.png?api=v2)

![Station configuration](https://openbrim.atlassian.net/wiki/download/attachments/2169143322/image-20230220-131138.png?api=v2)

### Step 4: Assign Section

Click the **three-dot icon** on the **Section** cell, select **Select**, and choose **AISCWT6X29**.

![Section selection](https://openbrim.atlassian.net/wiki/download/attachments/2169143322/image-20230220-131632.png?api=v2)

### Step 5: Complete All Bracing Members

Define left and right stations for all lateral bracing members on G1 and G2 girders.

![Bracing layout](https://openbrim.atlassian.net/wiki/download/attachments/2169143322/image-20230220-132846.png?api=v2)

### Step 6: Optional Gusset Plate Settings

Modify the **Gusset Plate** tab if desired. Changes affect 3D visualization only, not the FEA model.

![Gusset plate](https://openbrim.atlassian.net/wiki/download/attachments/2169143322/image-20230220-133115.png?api=v2)

## Verification

{% hint style="success" %}
The completed lateral bracing is shown below.
{% endhint %}

![Completed lateral bracing plan](https://openbrim.atlassian.net/wiki/download/attachments/2169143322/image-20230220-134124.png?api=v2)

![Completed lateral bracing 3D](https://openbrim.atlassian.net/wiki/download/attachments/2169143322/image-20230220-133845.png?api=v2)

![Completed lateral bracing detail](https://openbrim.atlassian.net/wiki/download/attachments/2169143322/image-20230220-133913.png?api=v2)


---

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