> 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/overview-of-the-bridge-model-ex1-stg.md).

# Overview of the Bridge Model

This section provides an overview of the Steel Tub Girder Bridge model configuration and parameters.

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**Navigation:** Overview of the Bridge Model
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## Bridge Configuration

The example Steel Tub Girder Bridge demonstrates a typical highway bridge with:

* Steel tub (box) girders as primary superstructure elements
* Composite concrete deck
* Internal and external bracing systems
* Multi-column pier substructure
* Pile-supported foundations

## Model Features

This example showcases the following OpenBrIM capabilities:

| Feature             | Description                                 |
| ------------------- | ------------------------------------------- |
| Parametric Geometry | Alignment-driven girder and deck geometry   |
| Staged Construction | Girder erection and deck pouring sequences  |
| Composite Action    | Non-composite and composite girder behavior |
| Code Compliance     | AASHTO 9th Edition design checks            |

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Review this overview before beginning the step-by-step modeling process.
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---

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