Braced girder (89)

Braced girder (89) creates braced girders between selected points in a precast concrete part, such as in a thin-shell slab or in a sandwich wall panel. The girders are cast into the concrete part and they also work as a part of the reinforcement and as a connector between the precast and cast-in-place concrete.

Objects created

The girders consist of the following parts:

Two bottom reinforcing bars
One or two top reinforcing bars
Two connecting reinforcing bars

Instead of using reinforcing bars, you can use profiles and plates to create the braced girders.

Use for


Situation	Description
	Braced girders are created in the precast concrete slab.
	Braced girders are created in the precast concrete sandwich panel.
	Braced girders are created in a wide plate floor with an opening.
	Braced girders are created in a hollow wall.
	Profile as a girder.

Selection order

Select the concrete part.
Pick the starting point of a girder.
Pick the end point of a girder.

Part identification key


	Part
1	Top reinforcing bar
2	Connecting reinforcing bar
3	Bottom reinforcing bar

Picture tab

Use the Picture tab to control the creation, shape and dimensions of reinforcement bars.

Reinforcing bar dimensions and shape


	Description
1	Distance between the end of the top reinforcing bar and the picked point.
2	Distance between the end of the connecting reinforcing bar and the picked point.
3	Distance between the end of the bottom reinforcing bar and the picked point.
4	Radius of the connecting reinforcing bar.
5	Distance between bendings.

Define the distance between the bottom reinforcing bars, and the distance between the top and bottom reinforcing bars.

If you add two reinforcing bars at the top, you can define the distance of these reinforcing bars from the top of the connecting reinforcing bars.


Examples

Girder creation


Option	Description
Create	Select the type of the bottom, top and connecting reinforcing bars (Bar a, b, c): Reinforcing bar Steel rod No (The reinforcing bar is not created.)
Profile	Profile selection is activated when you select the following girder option: Define a prefix and a start number for the part position number, and material, name, comment, and class.
Plate	Plate creation is activated when you select the following girder option: Define a prefix and a start number for the part position number, and material, name, comment, and class.
Add as	Select the method that is used to connect the girders to the cast unit: Sub-assembly, Welded, No

Reinforcing bar properties

Define the reinforcing bar properties for the top, bottom and the connecting reinforcing bars.


Option	Description
Size	Size of the reinforcing bar.
Grade/Material	Grade of the reinforcing bar.
Name Prefix Start number Comment Class	A name, a prefix and a start number for the part position number, and comment and class for the reinforcing bar.

Create as rebar assembly

You can add the created reinforcement as a rebar assembly to the cast units with a predefined assembly type, name, prefix, and start number.


Option	Description
Create as rebar assembly	Select Yes to create all reinforcement as one rebar assembly, and to include it to the cast unit of the input part.
Add to existing rebar assembly	Do not add: New rebar is added as a rebar assembly to the cast unit. As single bars: Add all new rebars directly into an existing rebar assembly as rebars. As sub-assembly: Add all new rebars to their own new rebar assembly, which is then included as a sub-assembly to the main rebar assembly.
Rebar assembly type	Select the rebar assembly type. If you do not select the type, the default value of the rebar assembly is used.
Name, Profile, Start number	Define the name, profile, and start number. If you do not define these, the default values of the rebar assembly are used.

Parts tab

Use the Parts tab to control the positioning and number of girders.

Workplane orientation


Option	Description
Workplane position	Use this setting to control to which side of the input part the girders are created. Part XY plane Part YZ plane Part ZX plane Model creates the girders according to the current work plane in the model. Select the axis direction for the model work plane position: Model XY, Model YZ, or Model ZX. Top in form face sets the work plane parallel to the top in form face plane.
Position in plane Rotation Position in depth	Define the orientation of the girder on the work plane.

Girder position in z direction

Select how the girders are positioned in the z direction.


Example
Braced girders are positioned to picked points. The braced girders are related to the top side of the part.

Geometry


Option	Description
Multiple L factor	Define the accuracy for the rounding of the girder length. The default value is 1.0. With the default value, there are no decimals in the girder length.
Geometry	Select the geometry for the connecting reinforcing bars. Examples:

Girder position in y direction

Select how the girders are positioned in the y direction.


Examples

Extra girders

Select whether additional girder groups are created.


Examples
For example, if you have selected this option:
Extra girder groups is set to None: No additional girder groups are created between 2 existing braced girders.
Extra girder groups is set to By number: Additional girder groups are created based on the entered number. Distances between the groups are equally divided.
Extra girder groups is set to By distance: The number of additional girder groups is based on the defined distance. The distances between the girder groups are equally divided.

Girder group

Define whether additional girders are created from the existing girders.

Number is the number of girders in the girder group.

Distance list is the distance between the girders in the girder group.

e = is the position of the girders from the reference line.


Option	Description
	Girder group is positioned in the middle of the reference line. Girder group is positioned on the right side of the reference line. Girder group is positioned on the left side of the reference line.


Examples
Existing girders
Additional girders

Geometry tab

Use the Geometry tab to control how openings and part length affect the girder creation.


Option	Description
Create always girders	Select whether girders are always created. If you select Yes, girders are created even when the girder is placed fully outside the concrete part.
Openings	Select whether girders are created in openings.
Length	Select how girders adapt to the part shape.
Cut	Select whether the entire braced girder is cut at openings, or only the parts that collide with openings.
Minimum length	Define the minimum length of the girder.
Maximum length	Define the maximum length of the girder. The girder is split when the maximum length is reached.


Examples of minimum length
No minimum length defined:
Defined minimum length (no girder created):

Double wall

Use the Double wall tab to select how a second concrete element affects the girders.

Look up sec concrete element

Select whether a second concrete element affects the creation of the girders. Define the class of the second wall in the Class box.

Select the first wall, and if the second wall matches the defined class, a girder is created. You can also enter a series of classes. You can use this creation method in combination with the options defined for openings on the Geometry tab.

The example below shows a hollow wall where inside and outside shells have different geometry.


Examples
A hollow core wall where inside and outside shells have different geometry. Look up second concrete element = No
A hollow core wall where inside and outside shells have different geometry. Look up second concrete element = Yes

UDA tab

You can define UDAs.