# Analyze and Design

This section explains how to run structural analysis and design verification for the Steel Tub Girder Bridge.

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**Navigation:** Analyze and Design
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## Overview

OpenBrIM computes parametric equations to create 3D/FEA/CAD representations based on project inputs. The process includes:

* **FEA Model Generation:** Node merging, meshing, load generation, influence surface coefficients
* **Analysis:** Time-dependent staged construction analysis
* **Design:** AASHTO code compliance verification with DC ratio calculations

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After parameter changes, you can rerun analysis or use previous results if the change doesn't affect the FEA model.
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## Steps

### Step 1: Run Analysis

Click the **Analyze** icon and select **Run Analysis**.

![Analyze button](https://openbrim.atlassian.net/wiki/download/attachments/2170355742/image-20230228-142856.png?api=v2)

![Run analysis options](https://openbrim.atlassian.net/wiki/download/attachments/2170355742/image-20230228-143655.png?api=v2)

<details>

<summary><strong>Quick Tip:</strong> Using Previous Results</summary>

If you have already performed an analysis and wish to use the results in the design section, click **Use Previous Analysis Results**.

</details>

### Step 2: Run Design

Click the **Design** icon. OpenBrIM displays the estimated design process duration.

![Design button](https://openbrim.atlassian.net/wiki/download/attachments/2170355742/image-20230228-144131.png?api=v2)

![Design progress](https://openbrim.atlassian.net/wiki/download/attachments/2170355742/image-20230228-144636.png?api=v2)

### Step 3: View Design Report

Click the **Report** icon and select **Design Report**.

![Report button](https://openbrim.atlassian.net/wiki/download/attachments/2170355742/image-20230228-145352.png?api=v2)

### Step 4: Review Results

Switch between sections in the **Summary Report** tree view to review results.

![Summary report](https://openbrim.atlassian.net/wiki/download/attachments/2170355742/image-20230228-145509.png?api=v2)

## Verification

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After completing these steps, review the design report to verify AASHTO compliance for all components.
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