> 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/substructure-ex1-stg/pile-ex1-stg.md).
# Pile
This section defines the pile layout, geometry, and properties for the foundation support system.
{% hint style="info" %}
**Navigation:** Substructure > Pile
{% endhint %}
## Steps
### Step 1: Navigate to Pile
Navigate to **Substructure > Pile** in the tree view.
### Step 2: Assign Foundations
Click the **three-dot icon** on the **Substructure** cell and select the footings.
The number of piles placed under each foundation according to the project specifications:
| Foundation | Number of Piles |
| ---------- | --------------- |
| RF1 | 9 piles |
| RF2 | 9 piles |
| F1 | 25 piles |
### Step 3: Define Pile Section Data
Click the **three-dot icon** on the **Section Data** cell and select **Edit**.
Enter the following parameters for **P1** (Pile):
| Parameter | Value |
| -------------------------------------- | ------- |
| Section Length (Starts from Top) \[ft] | 25 |
| Start Section | PileSec |
| End Section | PileSec |
### Step 4: Apply Section Data to All Piles
Apply the section data from the previous step to **all piles** in the project, as they are identical.
### Step 5: Define Pile Offsets
Enter the **Longitudinal Offset** and **Transverse Offset** from the footing origin for each pile.
### Step 6: Configure Pile Properties
Navigate to the **FEA** tab.
Click the **three-dot icon** on the **Pile Properties** cell and select **Edit**.
Edit the **Tx/Ty/Tz/Rz** properties in the Pile Properties spreadsheet as shown in the figure.
### Step 7: Apply Properties to All Piles
Apply the Pile Properties data from the previous step to all piles in the project, as they are identical.
### Step 8: Enter Pile Capacity
Enter a **Pile Capacity** of **360 kip** for each pile.
Quick Tip: Transverse Offset Direction
Offset values use PGL (Project Geometry Line) as the reference point.
## Verification
{% hint style="success" %}
The completed pile layout is shown below. With this step, the bridge substructure is complete.
{% endhint %}
---
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