# Pier

This section defines pier structures including pier caps and columns.

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**Navigation:** Substructure > Pier
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## Overview

Pier structures include:

* **Pier Cap:** Horizontal beam supporting girders
* **Pier Column:** Vertical columns supporting pier caps

## Sections

| Section                                                                                                                                                           | Description                             |
| ----------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------- |
| [Pier Cap](https://docs.openbrim.org/examples/concrete-bridge-examples/example-concrete-u-girder-bridge/substructure-ex1-cug/pier-ex1-cug/pier-cap-ex1-cug)       | Define pier cap geometry and properties |
| [Pier Column](https://docs.openbrim.org/examples/concrete-bridge-examples/example-concrete-u-girder-bridge/substructure-ex1-cug/pier-ex1-cug/pier-column-ex1-cug) | Configure column sections and locations |

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Complete pier cap definitions before configuring pier columns, as columns reference pier caps.
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