> 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/concrete-bridge-examples/example-concrete-u-girder-bridge/combinations-ex1-cug/design-load-combinations-ex1-cug.md).

# Design Load Combinations

This section configures design load combinations per AASHTO LRFD specifications.

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**Navigation:** Combinations > Design Load Combinations
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## Overview

Design load combinations apply appropriate load factors to individual load cases based on limit state requirements:

* **Limit States:** Define AASHTO limit state categories
* **Load Combination Table:** Configure specific load factor combinations

## Sections

| Section                                                                                                                                                                               | Description                                 |
| ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------- |
| [Limit States](/examples/concrete-bridge-examples/example-concrete-u-girder-bridge/combinations-ex1-cug/design-load-combinations-ex1-cug/limit-states-ex1-cug.md)                     | Define AASHTO limit state categories        |
| [Load Combination Table](/examples/concrete-bridge-examples/example-concrete-u-girder-bridge/combinations-ex1-cug/design-load-combinations-ex1-cug/load-combination-table-ex1-cug.md) | Configure load factors for each combination |

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Load combinations follow AASHTO LRFD Table 3.4.1-1 and 3.4.1-2.
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