Deck Slab Dialog

Setting	Description
Deck Thickness	Enter the thickness to be used for the deck slab. The same thickness is used for all slab segments.
Haunch Thickness	The haunch thickness is the distance from the top of web to the bottom of slab.
Sacrificial Wearing	Enter the thickness of sacrificial material placed on top of the deck. This thickness will still be used for dead load calculation, as part of slab self-weight, but it will not contribute to the member strength.
Add Slab	Press this button to add a slab segment to the bridge deck. A line will appear in the grid where the defining information for each slab segment is entered.
Delete Slab	Press this button to delete the currently highlighted slab segment. The currently highlighted slab segment is designated by a in the first column.
Number	This number is system generated number that is used to reference the element in the grid.
Name	Enter the name of the slab segment. By default LEAP Bridge Steel will assign names the Slab 01, Slab 02…
Material	From the drop down list, select the desired material from the material table entries.
Reference Back	Select the method desired to reference the back edge of the slab: Alignment - the back edge of the slab will be referenced by a station along the alignment. Support nn - the back edge of the slab will be located relative to the support selected from the list.
Reference Method	Select the reference method: If Alignment was selected for the Reference Back method then Station will appear as the reference method. This means that the edge of the slab will be perpendicular to the alignment at a user entered station. If an existing support (pier or abutment) was selected for the Reference Back method then two options will appear in this dropdown list as follows: The first option is Perpendicular to Support which means that the back edge of the slab will be located at an offset measured perpendicular to the referenced support. The second option is Along Alignment, which means that the back edge of the slab will be located at an offset measured along the alignment.
Offset/Station	If Alignment was selected as the Reference Method, a station value will be entered in this field. If an existing support was selected as the Reference Method then an offset distance in feet will be entered in this field. A negative offset means the distance is measured in the direction of decreasing stations and a positive value is in the direction of increasing stations.
Reference Ahead	Select the method desired to reference the ahead edge of the slab: Alignment - the back edge of the slab will be referenced by a station along the alignment. Support nn - the back edge of the slab will be located relative to the support selected from the list.
Reference Method	Select the reference method: If Alignment was selected for the Reference Back method then Station will appear as the reference method meaning that the edge of slab will be perpendicular to the alignment at a user entered station. If an existing support (pier or abutment) was selected for the Reference Ahead method then two options will appear in this drop-down list as follows: The first Option is Perpendicular to Support which means that the back edge of the slab will be located at an offset measured perpendicular to the referenced support. The second option is Along Alignment, which means that the back edge of the slab will be located at an offset measured along the alignment.
Offset/Station	If Alignment was selected as the Reference Method, a station value will be entered in this field. If an existing support was selected as the Reference Method then an offset distance in feet will be entered in this field. A negative offset means the distance is measured in the direction of decreasing stations and a positive value is in the direction of increasing stations.
Deck Generator	The Deck Generator drop-down has two options: Pier to Pier Slabs will make LBS generate separate slab segments between each support line. Single Slab Deck will make LBS generate one deck slab from the first support to the last.
Save DGN	The following button will export the Deck Slab 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.

Deck Thickness

Enter the thickness to be used for the deck slab. The same thickness is used for all slab segments.

Haunch Thickness

The haunch thickness is the distance from the top of web to the bottom of slab.

Sacrificial Wearing

Enter the thickness of sacrificial material placed on top of the deck. This thickness will still be used for dead load calculation, as part of slab self-weight, but it will not contribute to the member strength.

Add Slab

Press this button to add a slab segment to the bridge deck. A line will appear in the grid where the defining information for each slab segment is entered.

Delete Slab

Press this button to delete the currently highlighted slab segment. The currently highlighted slab segment is designated by a

in the first column.

Number

This number is system generated number that is used to reference the element in the grid.

Name

Enter the name of the slab segment. By default LEAP Bridge Steel will assign names the Slab 01, Slab 02…

Material

From the drop down list, select the desired material from the material table entries.

Reference Back

Select the method desired to reference the back edge of the slab:

Alignment - the back edge of the slab will be referenced by a station along the alignment.
Support nn - the back edge of the slab will be located relative to the support selected from the list.

Reference Method

Select the reference method:

If Alignment was selected for the Reference Back method then Station will appear as the reference method. This means that the edge of the slab will be perpendicular to the alignment at a user entered station.
If an existing support (pier or abutment) was selected for the Reference Back method then two options will appear in this dropdown list as follows: The first option is Perpendicular to Support which means that the back edge of the slab will be located at an offset measured perpendicular to the referenced support. The second option is Along Alignment, which means that the back edge of the slab will be located at an offset measured along the alignment.

Offset/Station

If Alignment was selected as the Reference Method, a station value will be entered in this field. If an existing support was selected as the Reference Method then an offset distance in feet will be entered in this field. A negative offset means the distance is measured in the direction of decreasing stations and a positive value is in the direction of increasing stations.

Reference Ahead

Select the method desired to reference the ahead edge of the slab:

Alignment - the back edge of the slab will be referenced by a station along the alignment.
Support nn - the back edge of the slab will be located relative to the support selected from the list.

Reference Method

Select the reference method:

If Alignment was selected for the Reference Back method then Station will appear as the reference method meaning that the edge of slab will be perpendicular to the alignment at a user entered station.
If an existing support (pier or abutment) was selected for the Reference Ahead method then two options will appear in this drop-down list as follows: The first Option is Perpendicular to Support which means that the back edge of the slab will be located at an offset measured perpendicular to the referenced support. The second option is Along Alignment, which means that the back edge of the slab will be located at an offset measured along the alignment.

Offset/Station

If Alignment was selected as the Reference Method, a station value will be entered in this field. If an existing support was selected as the Reference Method then an offset distance in feet will be entered in this field. A negative offset means the distance is measured in the direction of decreasing stations and a positive value is in the direction of increasing stations.

Deck Generator

The Deck Generator drop-down has two options:

Pier to Pier Slabs will make LBS generate separate slab segments between each support line.
Single Slab Deck will make LBS generate one deck slab from the first support to the last.

Save DGN

The following button will export the Deck Slab 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.