LEAP Bridge Steel Help

Member Groups Dialog

Opens when Member Groups is selected in the Superstructure group.
SettingDescription
Add Member Group Press the folder icon to create a new member group. When the edit box appears in the member group list accept the default member group name or enter a new member group name then hit the Enter key.
Delete Member Group Delete a member group by highlighting the member group name in the list and press the Delete (X) button
Draw all groups Check this box to draw all member groups in the graphic window.
Save DGN Press this button to export all member group geometry to a MicroStation .dgn file. Save the .dgn file to the desired location and once the export is complete you can browse to the file location and open/view it in MicroStation.
Back Reference Select the back reference support for the member group from the dropdown list. The back reference is the one with the lowest station value.
Ahead Reference Select the ahead reference support for the member group from the dropdown list. The ahead reference is the one with the highest station value.
Copy From This command will become active if another member group is already defined. To copy the member group definition from an existing member group to a new member group, select the existing member group from the drop down list.
Number of Members Enter the number of members in the member group. By default LEAP Bridge Steel will display the member centerlines in the graphic window, showing the left and right fascia members located at the slab edges and interior members equally spaced.
Path

There are three path options:

  • Concentric to align: This option will orient members parallel to a straight alignment or concentric to a curved alignment. Use this option for a curved girder layout.
  • Independent: This option will allow the girder spacing to be varied at the ahead and back supports. When this option is selected the Back Location data fields/options in the Property/Value grid will become active. Use this option to define the flared girder arrangements.
  • Custom beam path: This option will allow selection of geometry elements from the "Candidate Beam Paths" command as beam paths.
Member Type Use this dropdown list to select the member type. I-Girder and Tub-Girder are currently active.
Save DGN The following button will export the Member Groups 2D model directly and accurately to Microstation DGN file format, including layers. Save the DGN file in the desired location and once the export is successful you can browse to file location and open/view in Microstation.
Back / Ahead Location (for Concentric to Alignment and Independent beam paths only)
Left / Right Fascia Member   Locate the left fascia member
  Reference There are two options:
  • Select Left edge of slab as the reference location for the fascia member.
  • Select Alignment as the reference location for the fascia member.
  Direction There are two options:
  • Perpendicular to reference: select this option if the offset distance is measured perpendicular to the reference.
  • Along support: select this option if the offset distance is measured along the support line.
  Offset Enter the offset distance to locate the fascia member from the selected reference.

For Tub Girders, offset distance is measured from and to centerline of the girder

Interior Members   Locate the members between the two fascia members. It is recommended to locate the left and right fascia members before the interior members.
  Spacing Type There are two options for spacing type:
  • Equally spaced: select this option if the interior members are to be equally spaced between the fascia members. LEAP Bridge Steel will automatically calculate the spacing and show it in the spacing field.
  • Independent: select this option to enter the interior member spacing. When this option is selected the Spacing field will become active.
  Spacing This field will show the automatically computed spacing if the spacing type is set to Equally space. If the Spacing type is set to Independent the Spacing field will become active. Press the … button to activate the spacing dialog and enter the desired spacing. Note that the spacing values are measured along the support line.

For Tub Girders, spacing distance is measured from and to centerline of the girder.

Right Fascia Member   Locate the right fascia member
  Reference There are two options:
  • Select Right edge of slab as the reference location for the fascia member.
  • Select Alignment as the reference location for the fascia member.
  Direction There are two options:
  • Perpendicular to reference: select this option if the offset distance is measured perpendicular to the reference.
  • Along support: select this option if the offset distance is measured along the support line.
  Offset Enter the offset distance to locate the fascia member from the selected reference.
Ahead Location (for Concentric to Alignment and Independent beam paths only)
  Reference There are two options:
  • Select Left edge of slab as the reference location for the fascia member.
  • Select Alignment as the reference location for the fascia member.
  Direction There are two options:
  • Perpendicular to reference: select this option if the offset distance is measured perpendicular to the reference.
  • Along support: select this option if the offset distance is measured along the support line.
  Offset Enter the offset distance to locate the fascia member from the selected reference.
Interior Members   Locate the members between the two fascia members. It is recommended to locate the left and right fascia members before the interior members.
  Spacing Type There are two options for spacing type:
  • Equally spaced: select this option if the interior members are to be equally spaced between the fascia members. LEAP Bridge Steel will automatically calculate the spacing and show it in the spacing field.
  • Independent: select this option to enter the interior member spacing. When this option is selected the Spacing field will become active.
  Spacing This field will show the automatically computed spacing if the spacing type is set to Equally space. If the Spacing type is set to Independent the Spacing field will become active. Press the … button to activate the spacing dialog and enter the desired spacing. Note that the spacing values are measured along the support line .
Right Fascia Member   Locate the right fascia member .
  Reference There are two options:
  • Select Right edge of slab as the reference location for the fascia member.
  • Select Alignment as the reference location for the fascia member.
  Direction There are two options:
  • Perpendicular to reference: select this option if the offset distance is measured perpendicular to the reference.
  • Along support: select this option if the offset distance is measured along the support line.
  Offset Enter the offset distance to locate the fascia member from the selected reference.
Custom Beam Path If the Path is set to Custom beam Path the following input fields will appear for each member in the Member Group.
SettingDescription
Reference

Options are:

  • Left edge of slab (for the first or left most beam in the member group).
  • Previous member.
Direction

Options are:

  • Currently the only option is Along support.
Ref. Offset This is the distance measured from the previously selected reference.
Beam Path Select the geometry element to define the beam path. The geometry elements in the list were selected in the "Candidate Beam Path" command.
Path Offset This is the distance from the end of the original MicroStation element to the first support. Since LEAP Bridge Steel clips the element at the support the actual end is not visible.
OK Press this button to save all changes and exit the dialog.
Cancel Press this button to exit the dialog without saving changes.
Parent topic: Member Groups