Creating a Bar Joist

Create a structural grid if the project does not already have one.

Use a structural grid that you create in either Buildings and Civil Structures Design or Buildings Space Planning with either the Building Grid or Reference Plane Grid .

From the Steel section of the action bar, click Bar Joist

.

To select the series and designation, perform the following steps:

From Series, select the catalog series for the bar joist.
From Designation, select the size of the joist.

To select the bar joist location, in the Bar Joist dialog box, from Create Mode, select one of the following:

Option	Description
Single	Inserts a bar joist relative to only the selected segments.
Along gridline	Inserts bar joists relative to all similar segments along the gridline of the selected segments.
All in the story	Inserts bar joists relative to all similar segments in the same story as the selected segments.
Above and below	Inserts bar joists relative to all similar segments above and below the selected segments.
All in the building	Inserts bar joists relative to all similar segments in the structural grid.

From Positioning Type, click either:

Option	Description
Length & Angle	To place the bar joist by specifying the length and angle.
Length & Length	To place the bar joist by specifying the length along the two picked segments.

To create a bar joist in a new geometrical set, select the Create in a new geometrical set check box.

To enter custom values for the joist features, specify the following values:

To set the offset in the vertical direction, enter or select the Vertical offset.
From Rotation, enter or click the joist rotation angle.

For both End 1 and End 2 dimensions, select or enter for the following:


Dimension Element	Description
Top extension	Enter the length. The top chord extension supports overhangs by extending the top chord.
Bottom extension	Enter the length. The bottom chord extension supports elements such as a suspended ceiling or piping. It can also provide additional stability for the joist by extending to a vertical support.
Seat depth	Seat depth is the measurement from the top of the top chord to the bottom of the bearing seat. Each series has a standard seat depth, which is the default value. Since you can order joists with custom seat depth, you can enter a custom seat depth value.
Seat location	The bearing seat location is the dimension from the end of the bearing seat to the grid segment. The dimension can be a positive or negative value.

Note: To specify symmetrical joist ends, enter the same values for End 1 dimensions and End 2 dimensions. For asymmetrical joist ends, enter separate values for each end.

Expand Grid Segment Display and in the Grids to Display box, select the grids to display, and then select the checkboxes according to the requirement:


Option	Description
Show grid points on slabs	Displays grid points that lie on the slab surfaces.
Show grid points off slabs	Displays grid points that are off the slab surfaces.
Show grid segments	Displays grid segments between grid points.
Show curved grid segments	Generates curved grid segments from curved grid lines.
Show neutral axes	Displays neutral axes of existing members.
Show perimeter segments	Displays grid segments and points on the perimeter.
Show interior segments	Displays grid segments and points in the interior of the structural grid.

Note: To hide the specific element, clear the check box.