> 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/properties-ex1-cug/strands-ex1-cug.md).

# Strands

This section imports prestressing strand profiles from the OpenBrIM library.

{% hint style="info" %}
**Navigation:** Properties > Strands

For detailed parameter explanations, see the [Strands Reference](https://docs.openbrim.org/templates/concrete-u-girder-bridge-workflow/properties-cug/strands-cug).
{% endhint %}

## Steps

### Step 1: Navigate to Strands

Navigate to **Properties > Strands** in the tree view.

![Navigation](https://openbrim.atlassian.net/wiki/download/attachments/2258927629/image-20230824-151401.png?api=v2)

### Step 2: Import Strand Profile

Click the **three-dots icon** on the first cell of Name and select **Import Strand Profile**.

### Step 3: Select Strand Size

Import the following strand profile from the library:

| Library Path                                                                    | Profile Name             |
| ------------------------------------------------------------------------------- | ------------------------ |
| OpenBrIM Bridge Objects > ASTM Strand Sizes (Imperial) > ASTM A416 Grade 270ksi | Grade 270 3/5 inch No:15 |

![Import Strand](https://openbrim.atlassian.net/wiki/download/attachments/2258927629/image-20230824-152011.png?api=v2)

## Verification

{% hint style="success" %}
After completing these steps, the strand profile should appear as shown below.
{% endhint %}

![Completed Strands](https://openbrim.atlassian.net/wiki/download/attachments/2258927629/image-20230824-152129.png?api=v2)


---

# 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/properties-ex1-cug/strands-ex1-cug.md?ask=<question>&goal=<endgoal>
```

`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.