# Single Element \[STG]

Users may want to ensure the stability of girders during the analysis of girder erection. Girders that are not connected with bracings may be unstable. To address this issue, the girders are supported at temporary support locations, and this element can be utilized for this purpose.

To create a temporary support under the girder and manage its construction/deconstruction, please refer to the Quick Guide available at the link below.

[Steel Tub Girder — Additional Bearing Construction and Deconstruction \[QG-17\]](/quick-guides/steel-tub-girder-additional-bearing-construction-and-deconstruction.md)

## General

**Insertion Point**: *Pick* or *Select* an insertion point to define the location of the single element.

**Girder**: Select the girder to be supported.

**Flange \[Top Left/Top Right]**: This parameter specifies the flange as either *Top Left* or *Top Right*. The terms "right" and "left" indicate directions when looking up-station along the PGL.

**Station**: Specify the station location where the temporary support will be generated between the insertion point and the selected girder flange.

**Vertical Offset (from top)**: Define the top boundary of the temporary support using this parameter, which specifies its top location.

**Section**: Assign a section to the support with this parameter. Sections can either be imported or selected from previously defined options.

## Girder End Release

For the FEM of the single element to be generated correctly, fixity values for translation and rotation along each axis can be specified. One of the nodes will have the fixity of the bearing insertion point defined, and the other can be defined using the parameters in this tab.

**Tx**: This parameter specifies translation along the X-axis.

**Ty**: This parameter specifies translation along the Y-axis.

**Tz**: This parameter specifies translation along the Z-axis.

**Rx**: This parameter specifies rotation about the X-axis.

**Ry**: This parameter specifies rotation about the Y-axis.

**Rz**: This parameter specifies rotation about the Z-axis.

## IFC

**Type:** The IFC entity type for BIM export. \[IfcBridge/IfcBridgePart/IfcBeam/IfcColumn/IfcSlab/IfcFooting/IfcPile/IfcBearing/IfcReinforcingBar/IfcReinforcingMesh/IfcTendon/IfcMechanicalFastener/IfcAlignment/IfcPositioningElement/IfcKerb/IfcGuardrail/IfcSurfaceFeature/IfcElementAssembly/IfcCableSegment/IfcSensor/IfcDistributionElement/IfcPlate/IfcWall/IfcRail/IfcRoad/IfcDiscreteAccessory/IfcDistributionSystem/IfcMember/IfcBuildingElementProxy]

**Predefined Type:** The IFC Predefined Type is specified using this parameter to define the structural classification of the element. \[ABUTMENT/ACCESSORY\_ASSEMBLY/ARCH/BEAM\_GRID/BRACED\_FRAME/CROSS\_BRACING/DECK/DILATATIONPANEL/ENTRANCEWORKS/GIRDER/GRID/MAST/PIER/PYLON/RAIL\_MECHANICAL\_EQUIPMENT\_ASSEMBLY/REINFORCEMENT\_UNIT/RIGID\_FRAME/SHELTER/SIGNALASSEMBLY/SLAB\_FIELD/SUMPBUSTER/SUPPORTINGASSEMBLY/SUSPENSIONASSEMBLY/TRACKPANEL/TRACTION\_SWITCHING\_ASSEMBLY/TRAFFIC\_CALMING\_DEVICE/TRUSS/TURNOUTPANEL/USERDEFINED/NOTDEFINED]

**Parent:** The IFC Parent is specified using this parameter to define the hierarchy relationship in the IFC model. \[BRIDGE/SUPERSTRUCTURE/DECK/SUBSTRUCTURE/FOUNDATION/APPROACH\_STRUCTURE/RETAINING\_STRUCTURE]


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