> 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/templates/precast-i-girder-bridge-workflow/loading-pig.md).

# Loading \[PIG]

Two types of load definitions can be made using OpenBrIM:

Users can either make the necessary definitions for a library object, resulting in a 3D model and subsequently a FEM (Finite Element Model). Based on this model, loads can be applied to the bridge or specific load definitions can be made.

Alternatively, when using the **Loading** section of the workflow for load definitions, users can:

* Define the geometry as either a surface (quadrilateral, arbitrary), line, or point.
* Specify the magnitude with the following units:
  * Surface: Imperial Units (kips/ft²) or Metric Units (kN/m²)
  * Line: Imperial Units (kips/ft) or Metric Units (kN/m)
  * Point: Imperial Units (kips) or Metric Units (kN)

For a detailed explanation on how to define the load geometry and loads, please refer to the related documentation page.


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