# Properties

This section defines material properties, reinforcement profiles, strand profiles, and cross-sections used throughout the Concrete U Girder Bridge model.

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**Navigation:** Properties
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## Overview

Properties establish the structural characteristics for all bridge components:

* **Materials:** Concrete, steel, and prestressing steel properties
* **Rebars:** Reinforcement bar profiles from ASTM standards
* **Strands:** Prestressing strand profiles
* **Sections:** Cross-sectional geometry with reinforcement details

## Sections

| Section                                                                                                                                        | Description                                        |
| ---------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------- |
| [Materials](https://docs.openbrim.org/examples/concrete-bridge-examples/example-concrete-u-girder-bridge/properties-ex1-cug/materials-ex1-cug) | Define concrete, steel, and prestressing materials |
| [Rebars](https://docs.openbrim.org/examples/concrete-bridge-examples/example-concrete-u-girder-bridge/properties-ex1-cug/rebars-ex1-cug)       | Import rebar profiles from library                 |
| [Strands](https://docs.openbrim.org/examples/concrete-bridge-examples/example-concrete-u-girder-bridge/properties-ex1-cug/strands-ex1-cug)     | Import prestressing strand profiles                |
| [Sections](https://docs.openbrim.org/examples/concrete-bridge-examples/example-concrete-u-girder-bridge/properties-ex1-cug/sections-ex1-cug)   | Define cross-sections with reinforcement           |

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Complete each section in order to define all properties before proceeding to Superstructure.
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