# Combinations

This section defines load combinations and result extraction for the Steel Tub Girder Bridge analysis.

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**Navigation:** Combinations
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## Overview

Load combinations are used to determine critical design scenarios by combining various loads with appropriate load factors according to AASHTO specifications.

## Sections

| Section                                                                                                                                                                            | Description                                        |
| ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------- |
| [Result Extraction Cases](https://docs.openbrim.org/examples/steel-bridge-examples/example-steel-tub-girder-bridge-ex1-stg/combinations-ex1-stg/result-extraction-cases-ex1-stg)   | Define result extraction for analysis output       |
| [Design Load Combinations](https://docs.openbrim.org/examples/steel-bridge-examples/example-steel-tub-girder-bridge-ex1-stg/combinations-ex1-stg/design-load-combinations-ex1-stg) | Configure limit states and load combination tables |

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