# 11. Superstructure Code Checks

This section applies the code check templates to verify superstructure components per AASHTO LRFD 9th Edition.

{% hint style="info" %}
Run code checks after the analysis is complete. Results show demand/capacity ratios for each limit state.
{% endhint %}

## Superstructure Code Checks

| Check                                                                                                                                                                                                                      | Description                              |
| -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------- |
| [Steel I Girder Code Check (AASHTO)](https://docs.openbrim.org/examples/steel-bridge-examples/example-steel-i-girder-bridge-ex1-sig/superstructure-code-checks-ex1-sig/steel-i-girder-code-check-aashto-ex1-sig)           | Flexure, shear, and fatigue verification |
| [Bolted Field Splice Code Check (AASHTO)](https://docs.openbrim.org/examples/steel-bridge-examples/example-steel-i-girder-bridge-ex1-sig/superstructure-code-checks-ex1-sig/bolted-field-splice-code-check-aashto-ex1-sig) | Splice connection capacity               |
| [Cross Frame Code Check (AASHTO)](https://docs.openbrim.org/examples/steel-bridge-examples/example-steel-i-girder-bridge-ex1-sig/superstructure-code-checks-ex1-sig/cross-frame-code-check-aashto-ex1-sig)                 | Bracing member verification              |
| [Shear Stud Code Check (AASHTO)](https://docs.openbrim.org/examples/steel-bridge-examples/example-steel-i-girder-bridge-ex1-sig/superstructure-code-checks-ex1-sig/shear-stud-code-check-aashto-ex1-sig)                   | Composite connector capacity             |

## Checks Performed

### Steel I Girder

* Flexural strength (positive and negative bending)
* Shear strength
* Fatigue and fracture
* Constructibility
* Service limit state (permanent deformations)

### Field Splice

* Bolt shear and bearing
* Plate capacity
* Block shear

### Cross Frame

* Tension and compression member capacity
* Connection capacity

### Shear Stud

* Fatigue resistance
* Strength at ultimate limit state