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Create a reinforcing bar group

Added August 31, 2016 by Tekla User Assistance tekla.documentation@trimble.com

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Create a reinforcing bar group

Create a reinforcing bar group

A reinforcing bar groupgroup of reinforcing bars that are side by side and have identical properties, except the possible variation in bar lengths

includes several identical, or very similar, reinforcing bars. Tekla Structures always treats these bars as a group, modifies them in the same way, deletes them all at the same time, and so on. You first define the shape of a single bar, then the direction in which Tekla Structures distributes the bars.


If you do not want to manually define the bar shape, use Rebar shape catalog and its predefined reinforcement shapes instead.

  1. On the Concrete tab, click:

    If you need to modify the properties before you create the reinforcement, hold down Shift and click the Bar group command to open the Reinforcing Bar Properties dialog box.

  2. Select the part to reinforce.

    Tekla Structures attaches the bar group to this part.

  3. Pick the bar start point.
  4. Pick the other bar reference points.

    These points define the plane of the first bar and the shape of a single bar in the group.

  5. Click the middle mouse button to finish picking.
  6. Pick the start point of the bar group.
  7. Pick the end point of the bar group.

    The start and end points indicate the distribution length and direction of the bars. Usually the distribution length of the bars is perpendicular to the plane so that the cover thickness on the sides can be defined.

  8. If you want to modify the reinforcement, do one of the following:
    • Use direct modification. Ensure that the Direct modification switch is active.

    • Double-click the reinforcement to open the Reinforcing Bar Properties dialog box and modify the properties.

Reinforcing bar group properties

Use the Reinforcing Bar Properties dialog box to view and modify the properties of the reinforcing barreinforcement that represents a steel bar used to reinforce a concrete structure

The steel bars are usually ribbed and they are used to increase the tensile strength of concrete.

groups. The file name extension of the properties file is .rbg.

Option Description
Bar prefix and start number Mark series of the reinforcing bar.

User-definable name of the bar.

Tekla Structures uses bar names in reports and drawing lists, and to identify bars of the same type.


Diameter of the bar.

Depending on the environment, the nominal diameter of the bar, or a mark that defines the diameter.

Size-grade-radius combinations are predefined in the reinforcing bar catalog. Click the Select button to open the Select Reinforcing Bar dialog box. The dialog box shows the available bar sizes for the chosen grade. You can also select whether the bar is a main bar or a stirrup or tie.

The rebar_database.inp file contains the predefined reinforcing bar catalog entries.


Steel grade of the bar.

Bending radius

Internal radius of the bends in the bar.

You can enter a separate value for each bar bend. Separate the values with spaces.

Bending radius complies with the design code you are using. Main bars, stirrups, ties, and hooks usually have their own minimum internal bending radii, which are proportional to the diameter of the reinforcing bar. The actual bending radius is normally chosen to suit the size of the mandrels on the bar-bending machine.


Used to group reinforcement.

For example, you can display bars of different classes in different colors.

Hooks Shape Shape of the hook.

The rebar_database.inp file contains the predefined minimum bending radius and minimum hook length for all standard hooks.

See Add hooks to reinforcing bars.

Hooks Angle Angle of a custom hook
Hooks Radius Internal bending radius of a standard hook or custom hook.
Hooks Length Length of the straight part of a standard or custom hook.
Cover thickness on plane Distances from the part surfaces to the bar on the same plane as the bar. See Define the reinforcement cover thickness.
Cover thickness from plane Distance from the part surface to the bar, or to the bar end, perpendicular to the bar plane.
Start Concrete cover thickness or leg length at the first end of the bar.
End Concrete cover thickness or leg length at the second end of the bar.
User-defined attributes

You can create user-defined attributes to add information about reinforcement. Attributes can consist of numbers, text, or lists.

You can use the values of user-defined attributes in reports and drawings.

You can also change the name of the fields, and add new ones, by editing the objects.inp file. See User-defined attributes (UDAs) in the objects.inp file.

Option Description  
Creation method How the bars are spaced.

See Distribute bars in a reinforcing bar group.

Number of reinforcing bars
Target spacing value
Exact spacing value
Exact spacing values
Reinforcing bar(s) not to be created to the group Which bars are omitted from the group.

See Delete bars from a reinforcing bar group.

Rebar group type What is the type of the group.

See Create a tapered or spiral reinforcing bar group.

Number of cross sections

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