> 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/concrete-u-girder-bridge-workflow/superstructure-cug/diaphragm-cug/internal-diaphragm-cug.md).

# Internal Diaphragm \[CUG]

## Internal Diaphragm

**Girder:** Choose the girder on which the internal diaphragm is constructed.

**Reference Location \[Start/End/Middle]:** Reference location on the girder from which the diaphragm is positioned. Offset from Reference Location is measured from this point.

**Offset from Reference Location:** Offset distance from the chosen Reference Location (Start/End/Middle). Positive values shift the diaphragm upstation when Reference Location is Start, downstation when End.

**Start Skew:** Skew angle of the downstation face of the diaphragm.

**End Skew:** Skew angle of the upstation face of the diaphragm.

**Station on PGL (readonly):** Computed station on the PGL at which the diaphragm is placed, based on Girder, Reference Location, and Offset. Informational only.

**Thickness:** The thickness of the diaphragm plate can be specified using this parameter.

**Material:** The material of the diaphragm can be specified using this parameter. A previously defined material from the Properties > Materials section can be assigned, or a material can be imported.

## Quantities

**Volume:** The total volume of the internal diaphragm. (Read-only)

**Weight:** The total weight of the internal diaphragm, calculated based on the volume and material density. (Read-only)

## IFC Settings

**Type:** Select the IFC type for the internal diaphragm. Common options include IfcBeam, IfcPlate, IfcMember, IfcElementAssembly, and others depending on the modeling requirements.

**Predefined Type:** Specify the IFC predefined type. Options include CROSS\_BRACING, GIRDER, SLAB\_FIELD, and other standard IFC predefined types.

**Parent:** Define the parent element in the IFC hierarchy. Typically set to SUPERSTRUCTURE for internal diaphragms.

![](https://openbrim.atlassian.net/wiki/download/attachments/2228715537/image-20230808-115505.png?api=v2)


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