> 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-prestressed-i-girder-concrete-bridge-ex1-pig/properties-ex1-pig/sections-ex1-pig.md).

# Sections

This section defines the cross-sectional properties for girders, columns, caps, shafts, and barriers. Sections can be imported from the library or created manually.

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

For detailed parameter explanations, see the [Sections Reference](https://docs.openbrim.org/templates/precast-i-girder-bridge-workflow/properties-pig/sections-pig).
{% endhint %}

## Part 1: Adding Sections to the Project

### Step 1: Navigate to Sections

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

![Navigation](https://openbrim.atlassian.net/wiki/download/attachments/2235760642/image-20230712-110345.png?api=v2)

### Step 2: Import Girder Section

Click the **three-dots icon** on the first cell under **Name** and select **Import Section**.

Select **OpenBrIM Bridge Objects > Precast I Girder Sections > AASHTO I BEAMS > AASHTO\_TYPE\_III\_BEAM** and assign material **Fc\_6ksi**.

![Import Girder](https://openbrim.atlassian.net/wiki/download/attachments/2235760642/image-20230803-153815.png?api=v2)

### Step 3: Import Circular Sections

Import circular sections for shafts and columns:

| Section Name               | Radius | Material      |
| -------------------------- | ------ | ------------- |
| Circle\_exist\_shaft\_EB   | 18 in  | Fc\_4ksi      |
| Circle\_exist\_shaft\_Pier | 24 in  | Fc\_4ksi      |
| Circle\_exist\_column      | 18 in  | Fc\_5\_1/2ksi |

![Circle Import](https://openbrim.atlassian.net/wiki/download/attachments/2235760642/image-20230712-115718.png?api=v2)

![Circle Parameters](https://openbrim.atlassian.net/wiki/download/attachments/2235760642/image-20230712-115801.png?api=v2)

### Step 4: Import Rectangular Sections

Import rectangular sections for caps:

| Section Name            | Width | Depth | Material      |
| ----------------------- | ----- | ----- | ------------- |
| Rectangle\_exist\_EBcap | 44 in | 40 in | Fc\_5\_1/2ksi |
| PierCap\_exist          | 48 in | 40 in | Fc\_5\_1/2ksi |

![Rectangular Sections](https://openbrim.atlassian.net/wiki/download/attachments/2235760642/image-20230712-122236.png?api=v2)

### Step 5: Import Barrier Section

Select **OpenBrIM Bridge Objects > Barrier Sections > General > SingleSlopeRight**.

| Parameter    | Value                    |
| ------------ | ------------------------ |
| Section Name | Exist\_Barrier\_sw       |
| Top Width    | 10 in                    |
| Bottom Width | 18 in                    |
| Depth        | 32 in                    |
| Material     | Fc\_3\_2ksi\_NoStiffness |

![Barrier Section](https://openbrim.atlassian.net/wiki/download/attachments/2235760642/image-20230712-131136.png?api=v2)

![Barrier Parameters](https://openbrim.atlassian.net/wiki/download/attachments/2235760642/image-20230712-134657.png?api=v2)

### Step 6: Create Rigid Section

Add a new row and define a **RigidSection** for rigid link connections.

![Rigid Section](https://openbrim.atlassian.net/wiki/download/attachments/2235760642/image-20230712-135744.png?api=v2)

{% hint style="success" %}
After completing Part 1, your section definitions should match the view shown below.
{% endhint %}

![Completed Sections](https://openbrim.atlassian.net/wiki/download/attachments/2235760642/image-20230803-154327.png?api=v2)

## Part 2: Adding Rebars and Strands to Sections

This part defines the reinforcement details for each section.

### AASHTO\_TYPE\_III\_BEAM

Click the **three-dots icon** on the AASHTO\_TYPE\_III\_BEAM row to open the Section Editor.

![Section Editor](https://openbrim.atlassian.net/wiki/download/attachments/2235760642/image-20230712-142638.png?api=v2)

**Top Rebar:** Click the **+** icon and select **Rebar**. Configure:

* Profile: ASTMA615No8 | Material: A615\_60 | Reference Edge: Top
* Distance to Outer Surface: 2 in | Spacing: 4 in | Count: 4 rebars

![Top Rebar](https://openbrim.atlassian.net/wiki/download/attachments/2235760642/image-20230712-143829.png?api=v2)

**Bottom Rebar:**

* Profile: ASTMA615No8 | Material: A615\_60 | Reference Edge: Bottom
* Distance to Outer Surface: 2 in | Spacing: 2 in | Count: 8 rebars

![Bottom Rebar](https://openbrim.atlassian.net/wiki/download/attachments/2235760642/image-20230712-144221.png?api=v2)

**Prestressing Tendons:** Click the **+** icon and select **Tendon**.

| Row | Dist. to Ref Edge | Outer Spacing | Inner Spacing | Strand Count | Tendons/Row |
| --- | ----------------- | ------------- | ------------- | ------------ | ----------- |
| 1   | 4 in              | 3 in          | 4 in          | 1            | 7           |
| 2   | 6 in              | 2.5 in        | 2.5 in        | 1            | 6           |
| 3   | 8 in              | 3 in          | 3 in          | 1            | 3           |

All tendons use: Material: A416\_270low\_relaxation | Strand: Grade270\_3\_8\_No9

![Tendon Setup](https://openbrim.atlassian.net/wiki/download/attachments/2235760642/image-20230712-150054.png?api=v2)

![Completed Tendons](https://openbrim.atlassian.net/wiki/download/attachments/2235760642/image-20230712-151411.png?api=v2)

### Circle\_exist\_column

Open the Section Editor for Circle\_exist\_column.

![Column Section](https://openbrim.atlassian.net/wiki/download/attachments/2235760642/image-20230801-121342.png?api=v2)

Navigate to the **Circular Layout** tab:

* Profile: ASTMA615No11 | Material: A615\_60
* Radius: 14 in | Count: 20 rebars

![Circular Rebar](https://openbrim.atlassian.net/wiki/download/attachments/2235760642/image-20230801-121830.png?api=v2)

![Completed Column](https://openbrim.atlassian.net/wiki/download/attachments/2235760642/image-20230801-122036.png?api=v2)

### Rectangle\_exist\_EBcap

Open the Section Editor for Rectangle\_exist\_EBcap.

![EB Cap Section](https://openbrim.atlassian.net/wiki/download/attachments/2235760642/image-20230801-143116.png?api=v2)

Use the **Draw Rebar Points** tab to define rebar at top, middle, and bottom:

| Location | Profile     | Count |
| -------- | ----------- | ----- |
| Top      | ASTMA615No9 | 4     |
| Middle   | ASTMA615No6 | 2x2   |
| Bottom   | ASTMA615No9 | 4     |

![Draw Rebar](https://openbrim.atlassian.net/wiki/download/attachments/2235760642/image-20230712-161812.png?api=v2)

### PierCap\_exist

Open the Section Editor for PierCap\_exist.

![Pier Cap Section](https://openbrim.atlassian.net/wiki/download/attachments/2235760642/image-20230802-070045.png?api=v2)

Use the **Draw Rebar Points** tab:

| Location | Profile      | Count |
| -------- | ------------ | ----- |
| Top      | ASTMA615No11 | 9     |
| Middle   | ASTMA615No6  | 5x2   |
| Bottom   | ASTMA615No11 | 5     |

![Pier Cap Rebar](https://openbrim.atlassian.net/wiki/download/attachments/2235760642/image-20230802-070454.png?api=v2)

![Completed Pier Cap](https://openbrim.atlassian.net/wiki/download/attachments/2235760642/image-20230802-072001.png?api=v2)

## Verification

{% hint style="success" %}
After completing all steps, verify that all sections have the correct reinforcement definitions by opening each section in the Section Editor.
{% endhint %}


---

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