# Shear Stud \[STG]

Shear Studs does not directly affect the finite element model and is used only for design and 3D visualization purposes.

## Position

**Girder:** Choose the plate girder

**Start Station:** The start station of Shear Studs, calculated based on the PGL.

**End Station:** The station is located along the PGL. If the shear stud parameters, such as diameter, number of studs per row, spacing of studs in row, and spacing between rows, are the same between two stations, those stations can be used as the start and end stations.

## Shear Stud

The parameters listed below can be defined for detailed specifications of the shear studs. For a visual representation of each parameter, please refer to the figure below.

**Diameter:** Diameter of each shear stud.

**Shear Stud In-Place Height**: This parameter can be used to specify the in-place height of the shear studs.

**Shear Stud Head Thickness:** This parameter can be used to specify the thickness of the shear stud heads.

**Shear Stud Head Diameter:** Diameter of the flared head of each shear stud. Typically taken 1.5 to 2 times the shaft diameter per AASHTO 6.10.10.

**Shear Stud Configuration \[Regularly Spaced/Clusters]:** Select the shear stud arrangement pattern. 'Regularly Spaced' distributes studs evenly along the girder length, while 'Clusters' groups studs together at specified intervals.

**Cluster Row Count:** When using the Clusters configuration, this parameter specifies the number of stud rows within each cluster. Only applicable when Shear Stud Configuration is set to 'Clusters'.

**Cluster Row Spacing:** The spacing between rows of studs within each cluster. Only applicable when Shear Stud Configuration is set to 'Clusters'.

**No. Of Studs Per Row:** This parameter can be used to specify the number of studs in each row.

**Spacing Of Studs In Row:** This parameter can be used to set the center-to-center distance of studs within a row.

**Spacing Between Rows:** For regularly spaced layouts this is the center-to-center spacing between adjacent stud rows; for clusters it is the distance between cluster groups along the girder.

**Number of Segments Used to Draw the Bolt:** The "Number of Segments Used to Draw the Bolt" defines how many discrete segments are used to represent a bolt in the graphical model. Using a higher number increases geometric detail but also generates more triangulation, which can slow down project compilation and reduce rendering performance.

**Show Studs (Detailing) \[NO/YES]:** To display the shear studs, this parameter should be set to ‘YES,’ and the DETAILING button on the top middle bar must be turned on.

![image-20241030-143627.png](https://openbrim.atlassian.net/wiki/download/attachments/2185200290/image-20241030-143627.png?api=v2)

## Quantities

**Shear Stud Count:** The total number of shear studs for each row, based on user definitions, is calculated and presented to the user under this column.

## IFC

**Type:** The IFC entity type for BIM export. Options include \[IfcMechanicalFastener] (default: IfcMechanicalFastener).

**Predefined Type:** The IFC Predefined Type is specified using this parameter. Available options include \[ANCHORBOLT/BOLT/SHEARCONNECTOR/STUDSHEARCONNECTOR/USERDEFINED/NOTDEFINED] (default: STUDSHEARCONNECTOR).

**Parent \[Bridge/Superstructure/Deck/Substructure/Foundation/Approach\_Structure/Retaining\_Structure]:** The IFC Parent is specified using this parameter to define the hierarchy relationship in the IFC model.


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