# Rectangular

This section defines rectangular footing geometry for standard pier columns.

{% hint style="info" %}
**Navigation:** Substructure > Foundation > Rectangular

For detailed parameter explanations, see the [Rectangular Reference](https://docs.openbrim.org/templates/steel-tub-girder-bridge-workflow/substructure-stg/foundation-stg/rectangular-stg).
{% endhint %}

## Steps

### Step 1: Navigate to Rectangular Foundation

Navigate to **Foundation > Rectangular** in the tree view.

![Rectangular foundation navigation](https://openbrim.atlassian.net/wiki/download/attachments/2169110585/image-20230222-093634.png?api=v2)

### Step 2: Assign Substructure

Click the **three-dot icon** on the **Substructure** cell and select **Column1** and **Column2**.

### Step 3: Define Footing Dimensions

Enter the footing dimensions as shown in the table:

| Parameter                 | Description                       |
| ------------------------- | --------------------------------- |
| Footing Width \[ft]       | Width of the rectangular footing  |
| Footing Length \[ft]      | Length of the rectangular footing |
| Longitudinal Offset \[ft] | Offset along alignment            |

![Footing dimensions](https://openbrim.atlassian.net/wiki/download/attachments/2169110585/image-20230222-094042.png?api=v2)

### Step 4: Assign Material

Click the **three-dot icon** on the **Material** cell and select **Fc\_5ksi** concrete material for the rectangular footings.

![Material assignment](https://openbrim.atlassian.net/wiki/download/attachments/2169110585/image-20230222-094116.png?api=v2)

### Step 5: Configure FEM Settings

Navigate to the **FEM** tab and select **RigidSection** for the Rigid Section column.

![FEM settings](https://openbrim.atlassian.net/wiki/download/attachments/2169110585/image-20230222-094459.png?api=v2)

<details>

<summary><strong>Quick Tip:</strong> Foundation Offsets</summary>

**Longitudinal Offset:** Offsets the foundation along the alignment.

**Transverse Offset:** Offsets the foundation on the y-axis perpendicular to the alignment.

**Rotation:** Rotates the XY plane.

</details>

## Verification

{% hint style="success" %}
The completed rectangular footings are shown below.
{% endhint %}

![Rectangular footings 3D view](https://openbrim.atlassian.net/wiki/download/attachments/2169110585/image-20230222-105019.png?api=v2)

![Rectangular footings plan view](https://openbrim.atlassian.net/wiki/download/attachments/2169110585/image-20230222-105048.png?api=v2)