> 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/steel-bridge-examples/example-steel-tub-girder-bridge-ex1-stg/loading-ex1-stg/loads-ex1-stg/temperature-load-ex1-stg.md).

# Temperature Load

This section defines uniform temperature loads for thermal expansion and contraction.

{% hint style="info" %}
**Navigation:** Loading > Loads > Temperature Load
{% endhint %}

## Overview

Temperature variations that occur throughout the day exert two types of loads on bridges: expansion and contraction.

## Steps

### Step 1: Navigate to Uniform Temperature Load

Navigate to **Loads > Temperature Load > Uniform Temperature Load** in the tree view.

![Temperature Load navigation](https://openbrim.atlassian.net/wiki/download/attachments/2170028033/image-20230224-115515.png?api=v2)

### Step 2: Select Construction Stages

Click the **three-dot icon** on the **Stage** cell and select **TUExpStage** and **TUContrStage** to define the temperature loads that have an impact on the bridge.

![Stage selection](https://openbrim.atlassian.net/wiki/download/attachments/2170028033/image-20230224-115533.png?api=v2)

![Stage assignment](https://openbrim.atlassian.net/wiki/download/attachments/2170028033/image-20230224-115707.png?api=v2)

### Step 3: Assign Bridge

Click the **three-dot icon** on the **Bridge** cell and set Bridge as **BRG1**.

![Bridge assignment](https://openbrim.atlassian.net/wiki/download/attachments/2170028033/image-20230224-120236.png?api=v2)

### Step 4: Set Temperature Changes

Set Temperature Change from mean \[F] parameters:

* UTL1: **40 F** (expansion)
* UTL2: **-40 F** (contraction)

The purpose is to calculate the loads that may occur under these critical temperatures.

![Temperature values](https://openbrim.atlassian.net/wiki/download/attachments/2170028033/image-20230224-120745.png?api=v2)

## Verification

{% hint style="success" %}
Temperature loads for expansion and contraction should be properly defined.
{% 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/steel-bridge-examples/example-steel-tub-girder-bridge-ex1-stg/loading-ex1-stg/loads-ex1-stg/temperature-load-ex1-stg.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.