> 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/truss-bridge-workflow/construction-tb/changes-tb/pier-section-property-override-tb.md).

# Pier Section Property Override \[TB]

Since seismic analysis requires sections to be updated with cracked inertia and the structure to be analyzed accordingly, this object can be used to override a section's properties, such as **pier columns**.

The inputs for this object include factors that will be multiplied by the section's **Area**, **Shear Area Y/Z**, **Torsion Constant**, and **Inertia Y/Z** values (found under **Properties > Sections**) when defined.

## Section Overrides

**Pier Column:** Specify the modeled column whose properties will be overridden.

**Stage:** Specify the stage at which the column with changed properties will be considered for both FEM and design.

**Section Area Factor:** Define the area factor that will be multiplied by the section's area.

**Section Shear Area Y Factor:** Define the shear area factor for the Y direction that will be multiplied by the section's shear area.

**Section Shear Area Z Factor:** Define the shear area factor for the Z direction that will be multiplied by the section's shear area.

**Section Torsion Constant Factor:** Define the factor that will be multiplied by the section's torsion constant.

**Section Inertia Y Factor:** Define the inertia factor for the Y direction that will be multiplied by the section's inertia.

**Section Inertia Z Factor:** Define the inertia factor for the Z direction that will be multiplied by the section's inertia.


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