> 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-i-girder-bridge-ex1-sig/loading-ex1-sig/loads-ex1-sig/inf-surf-based-llbrce-ex1-sig/live-load-case-ex1-sig.md).
# Live Load Case
{% hint style="info" %}
**Navigation:** Loading > Loads > Inf Surf Based Llbrce > Live Load Case
For detailed parameter explanations, see the [Live Load Case Reference](https://docs.openbrim.org/templates/steel-i-girder-bridge-workflow/loading-sig/loads-sig/inf-surf-based-llbrce-sig/live-load-case-highway-sig).
{% endhint %}
**Step 1:** Click the **three-dots icon** on the **Influence Surface** cell, and then set **ISGravity**.
**Step 2:** Keep the **Influence Surface 2, Influence Surface 3, Influence Surface 4** and **Max for Stress Range** as default.
**Step 3:** Click **three-dots icon** on **Multiple Presence Factor** and click **Edit.**
**Step 4:** Please enter the following values sequentially:\
1st row - Factor: **1.2**\
2nd row - Factor: **1**\
3rd row - Factor: **0.85**\
4th row - Factor: **0.65**
**Step 5:** Keep the **Maximum Number of Lanes** as default.
**Step 6:** You can edit the Design Lanes of live load case from **Design Lanes** tab.
Click **three-dots icon** on Design Lane Option 1 cells and select a **Design Lane** as **HL93AndLane\_LL.**
If you have reached this stage and you don't have a design lane to select, and if you want to use the **Import Button**, you can refer to the **Quick Tip**.
Quick Tip: Learn how to import design lane
If there is no design lane to be set, follow the steps below:
\- Click the three dots on the cell and select Import Design Lane.
\- In the opened window, choose the design lane.\
\- Click the Import button.
**Step 7:** Click **three-dots icon** on Design Lane Option 2 cells and select a **Design Lane** as **HL93TandemTruckAndLane\_LL.**
**Step 8:** Click **three-dots icon** on Design Lane Option 3 cells and select a **Design Lane** as **HL93TwoTrucksAndLane\_LL.**
**Step 9:** Keep the **Design Lane Option 4** and **Magnification Factors tabs parameters** as default.
**Step 10:** Set name as **LLHL93Case**.
| **Live Load Case** | |
| ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| General
\
LLHL93Case ISGravity NULL NULL NULL NO \[1.2,1,0.85,0.65] No Limit\
LLFatCase ISGravity NULL NULL NULL YES \[1] 1 Lane\
LLBrakingCase ISBraking NULL NULL NULL NO \[1.2,1,0.85,0.65] No Limit\
LLCentCase ISCentr NULL NULL NULL NO \[1.2,1,0.85,0.65] No Limit\
LLDefCase ISGravity NULL NULL NULL NO \[1.2,1,0.85,0.65] No Limit\
| Design Lanes
\
LLHL93Case HL93AndLane\_LL HL93TandemTruckAndLane\_LL HL93TwoTrucksAndLane\_LL NULL\
LLFatCase HL93\_Fatigue NULL NULL NULL\
LLBrakingCase HL93\_BR HL93AndLane\_BR NULL NULL\
LLCentCase HL93\_CE NULL NULL NULL\
LLDefCase HL93\_Deflection HL93AndLane\_Deflection NULL NULL\
|
{% hint style="success" %}
The completed live load cases are illustrated below. Please verify that you have the same model on your end by examining each view provided here. For more information on how to perform visual checks, refer to the quick tips.
{% endhint %}
{% hint style="success" %}
To view the entire procedure explained on this page, please watch the recorded Video below.
{% endhint %}
{% embed url="" %}
Live Load Case
{% endembed %}
---
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