> 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/construction-ex1-cug/superstructure-construction-ex1-cug/diaphragm-construction-ex1-cug.md).

# Diaphragm Construction

This section assigns diaphragms to construction stages.

{% hint style="info" %}
**Navigation:** Construction > Superstructure Construction > Diaphragm Construction

For detailed parameter explanations, see the [Diaphragm Construction Reference](https://docs.openbrim.org/templates/concrete-u-girder-bridge-workflow/construction-cug/superstructure-construction-cug/diaphragm-construction-cug).
{% endhint %}

## Steps

### Step 1: Navigate to Diaphragm Construction

Navigate to **Construction > Superstructure Construction > Diaphragm Construction** in the tree view.

### Step 2: Assign Internal Diaphragms

Associate internal diaphragms with stages when they are cast or installed.

### Step 3: Assign External Diaphragms

Associate external diaphragms with stages when connections between girders are made.

## Verification

{% hint style="success" %}
After completing these steps, diaphragms are assigned to construction stages.
{% endhint %}


---

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