> 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/superstructure-ex1-cug/deck-ex1-cug/concrete-deck-ex1-cug.md).
# Concrete Deck
This section defines the concrete deck geometry, cross-sections, material properties, and reinforcement.
{% hint style="info" %}
**Navigation:** Superstructure > Deck > Concrete Deck
For detailed parameter explanations, see the [Concrete Deck Reference](https://docs.openbrim.org/templates/concrete-u-girder-bridge-workflow/superstructure-cug/deck-cug/concrete-deck-cug).
{% endhint %}
## Steps
### Step 1: Navigate to Concrete Deck
Navigate to **Deck > Concrete Deck** in the tree view.
### Step 2: Select Girders
Click the **three-dots icon** on the **Girders** column and select **Pick**. Graphically select the girders (CUG1, CUG2) to associate with the deck.
### Step 3: Define Cross-Section
Click the **three-dots icon** on the **Cross-Section** cell and select **Edit**.
### Step 4: Assign Cross-Section Locations
Click the **three-dots icon** on **Cross Section Location** and define the locations:
| Support Line | Cross-Section |
| ------------ | ------------- |
| SL1 | CS1 |
| SL4 | CS1 |
Quick Tip: Cross-Section Variation
When the cross-section changes between two support lines, use the **Variation w/Next Segment** parameter to define transition attributes between sections.
### Step 5: Assign Material
Navigate back to the **General** tab and set **Material** to **Fc\_5ksi**.
### Step 6: Define Deck Reinforcement
Click the **three-dots icon** on **Deck Reinforcement Data** and select **Edit**.
Enter the reinforcement parameters:
| Parameter | Value |
| -------------- | ----------- |
| Rebar Material | A615\_60 |
| Top Cover | 4 in |
| Bottom Cover | 4 in |
| Top Rebar | ASTMA615No9 |
| Bottom Rebar | ASTMA615No9 |
| Top Spacing | 2 in |
| Bottom Spacing | 2 in |
## Verification
{% hint style="success" %}
The completed concrete deck is shown below.
{% endhint %}
---
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