> 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/substructure-ex1-cug/pier-ex1-cug/pier-column-ex1-cug.md).
# Pier Column
This section defines the pier column geometry, sections, and positions for intermediate supports.
{% hint style="info" %}
**Navigation:** Substructure > Pier > Pier Column
For detailed parameter explanations, see the [Pier Column Reference](https://docs.openbrim.org/templates/concrete-u-girder-bridge-workflow/substructure-cug/pier-cug/pier-column-cug).
{% endhint %}
## Steps
### Step 1: Navigate to Pier Column
Navigate to **Pier > Pier Column** in the tree view.
### Step 2: Assign Cap and Name
Click the **three-dots icon** on the **Cap** cell and select the pier cap. Enter the column name (e.g., **Pier\_1**).
### Step 3: Define Section Data
Click the **three-dots icon** on **Section Data** and select **Edit**.
Enter the following parameters:
| Parameter | Value |
| ------------------------- | ------ |
| Section Length (from Top) | 50 ft |
| Start Section | ColSec |
| End Section | ColSec |
### Step 4: Set Column Position
Navigate to the **General** tab and enter the position parameters:
| Parameter | Value |
| ----------------- | ------ |
| Transverse Offset | ±10 ft |
| Rotation Angle | 0° |
| Bottom Elevation | -35 ft |
### Step 5: Create All Pier Columns
Repeat the previous steps to create all pier columns:
| Column | Cap | Transverse Offset |
| ------- | -------- | ----------------- |
| Pier\_1 | PierCap1 | -10 ft |
| Pier\_2 | PierCap1 | +10 ft |
| Pier\_3 | PierCap2 | -10 ft |
| Pier\_4 | PierCap2 | +10 ft |
Quick Tip: Transverse Offset Direction
Offset values use PGL (Profile Grade Line) as the reference point. Positive values offset to the right, negative to the left.
## Verification
{% hint style="success" %}
The completed pier columns are shown below.
{% endhint %}
---
# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.
## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:
```
GET https://docs.openbrim.org/examples/concrete-bridge-examples/example-concrete-u-girder-bridge/substructure-ex1-cug/pier-ex1-cug/pier-column-ex1-cug.md?ask=&goal=
```
`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.