> 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/loading-ex1-stg/loads-ex1-stg/wind-load-ex1-stg.md).

# Wind Load

This section defines wind loads on the structure according to AASHTO specifications.

{% hint style="info" %}
**Navigation:** Loading > Loads > Wind Load
{% endhint %}

## Steps

### Step 1: Navigate to Wind Load AASHTO

Navigate to **Loads > Wind Load > Wind Load AASHTO** in the tree view.

![Wind Load navigation](https://openbrim.atlassian.net/wiki/download/attachments/2169962497/image-20230224-094418.png?api=v2)

### Step 2: Select Construction Stage

Click the **three-dot icon** on the **Stage** cell and select **WSStage**.

![Stage selection](https://openbrim.atlassian.net/wiki/download/attachments/2169962497/image-20230224-094443.png?api=v2)

### Step 3: Set Wind Direction

Set **Right to Left** as the Wind Direction.

![Wind direction](https://openbrim.atlassian.net/wiki/download/attachments/2169962497/image-20230224-104310.png?api=v2)

### Step 4: Define Structural Objects

Click the **three-dot icon** on the **Structural Objects And Pressure Parameters** cell and select **Edit**.

![Edit parameters](https://openbrim.atlassian.net/wiki/download/attachments/2169962497/image-20230224-105256.png?api=v2)

![Structural objects](https://openbrim.atlassian.net/wiki/download/attachments/2169962497/image-20230224-105843.png?api=v2)

### Step 5: Pick Applied Elements

Click the **three-dot icon** on the **Applied Elements** cell and pick all elements affected by wind from the 3D View.

Define parameters for each element:

* Structural Height From Ground Line \[ft]
* Gust Effect Factor
* Drag Coefficient

![Element parameters](https://openbrim.atlassian.net/wiki/download/attachments/2169962497/image-20230224-110554.png?api=v2)

### Step 6: Configure Wind Parameters

Navigate back to the **Params** tab.

Enter Design Wind Speed (mph) and Surface Roughness parameters according to AASHTO specifications.

![Wind parameters](https://openbrim.atlassian.net/wiki/download/attachments/2169962497/image-20230224-111338.png?api=v2)

## Verification

{% hint style="success" %}
Wind load should be properly defined for all exposed structural elements.
{% endhint %}


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