> 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/superstructure-pig/diaphragms-pig/intermediate-diaphragm-pig.md).

# Intermediate Diaphragm \[PIG]

Intermediate diaphragms placed between supports along a precast I-girder span.

## Intermediate Diaphragm

**Connected Girders:** Girders tied together by the intermediate diaphragm.

**Station \[Start/End]:** Station along the PGL at which the diaphragm is placed. May be specified as Start, End, or a numeric value.

**Diaphragm Station:** Numeric station along the PGL (measured from start-of-bridge) at which the diaphragm is placed. Only used when Station is not Start/End.

**Skew Angle:** In-plan rotation of the diaphragm. Positive rotates clockwise; negative counterclockwise. Only applicable when the station is a numeric value.

**Depth:** Vertical depth of the diaphragm.

**Thickness (Downstation):** Longitudinal thickness of the diaphragm on the downstation face. Use together with Thickness (Upstation) to model a tapered diaphragm.

**Thickness (Upstation):** Longitudinal thickness of the diaphragm on the upstation face. Use together with Thickness (Downstation) to model a tapered diaphragm.

**Additional Overhang Length Transverse Dir. (Left):** Distance from the leftmost girder centerline to the left edge of the diaphragm in the transverse direction.

**Additional Overhang Length Transverse Dir. (Right):** Distance from the rightmost girder centerline to the right edge of the diaphragm in the transverse direction.

**Material:** Concrete material assigned to the diaphragm.

## FEM

**Cap Connection \[Yes/No]:** When Yes, generates a FE connection between the diaphragm top and the pier-cap top.

**Cap Connection Type \[Rigid/Pin]:** Controls whether the cap connection is rigid or pinned.

**Deck Connection \[Yes/No]:** When Yes, generates a FE connection from the diaphragm top to the deck.


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