You can use modifiers to modify a rebar set at certain locations only.

For example, you can create a local property modifier to only change the properties of certain bars in a rebar set, or you can create hooks or threading by adding an end detail modifier , or you can split rebar set bars with a splitter.

You can also create secondary guidelines for the rebar set. With a secondary guideline you can define a different spacing at the start and end of the rebar set bars, for example.

Modifiers are lines, or polylines that may have corner chamfers. Modifiers are projected to rebar set leg faces. Each modifier then only affects the rebar set bars that its projection touches.

To select entire rebar sets, or bar groups or individual bars within rebar sets in the model, you can use the three reinforcement selection switches. Tekla Structures then shows the existing modifiers that affect the selected rebar set bars, and the direct modification handles of the modifiers. Different modifiers have different colors as follows:

Modifier	Color	Example
Property modifier	Light green
End detail modifier	Magenta
Splitter	Orange
Secondary guideline	Light blue

An arrowhead symbolclose to the midpoint of each modifier indicates the direction of the modifier, pointing from the start towards the end of the modifier.

When you select a modifier, Tekla Structures indicates the rebar set bars that are affected by the modifier, and shows the other, unaffected bars as semi-transparent.

You can modify the modifiers by using direct modification, or by changing their properties in the property pane or on the contextual toolbar. When you change the modifier properties, the properties of the rebar set bars change at the location defined by the modifier.

When you delete a modifier, the rebar set reverts to the state it had without the modifier.

Property modifiers are shown in light green.

1. Using the reinforcement selection switches, select the rebar set bars for which you want to create the modifier.
2. On the Rebar set contextual tab on the ribbon, clickProperty modifier.
3. Define how you want to place the modifier in the model.

   Click the Picking mode button on the contextual tab to cycle through the picking modes and to select the picking mode.

   Thebutton indicates that you can pick one point, and thebutton indicates that you can pick multiple points. Thebutton indicates that the modifier will be created for the selected bars only.

4. Depending on the selected picking mode, do one of the following:
   • Pick one point to create a single line modifier for the selected rebar set, bar group, or bars.
   • Pick two points to define the end points of a single line modifier. Then click the middle mouse button.
   • Pick multiple points to create a polyline modifier. Then click the middle mouse button to finish picking.
5. To end the command, press Esc.
6. To apply local modifications to the rebar set bars at the modifier location:
   1. Select the modifier.
   2. If you need to change the modifier geometry, drag the direct modification handles.
   3. Change the property modifier properties on the contextual toolbar or in the property pane.
   4. If you used the property pane, click Modify to save the changes.

End detail modifiers affect the nearest end of the bar, so by moving the modifier you can change the bar end that it affects. End detail modifiers are shown in magenta.

1. Using the reinforcement selection switches, select the rebar set bars for which you want to create the modifier.
2. On the Rebar set contextual tab on the ribbon, clickEnd detail.
3. Define how you want to place the modifier in the model.

   Click the Picking mode button on the contextual tab to cycle through the picking modes and to select the picking mode.

   Thebutton indicates that you can pick one point, and thebutton indicates that you can pick multiple points. Thebutton indicates that the modifier will be created for the selected bars only.

4. Depending on the selected picking mode, do one of the following:
   • Pick one point to create a single line modifier for the selected rebar set, bar group, or bars.
   • Pick two points to define the end points of a single line modifier. Then click the middle mouse button.
   • Pick multiple points to create a polyline modifier. Then click the middle mouse button to finish picking.
5. To end the command, press Esc.
6. To apply local modifications to the rebar set bars at the modifier location:
   1. Select the modifier.
   2. If you need to change the modifier geometry, drag the direct modification handles.
   3. Change the end detail modifier properties on the contextual toolbar or in the property pane.
   4. If you used the property pane, click Modify to save the changes.

Splitters split bars and create lap or crank splices. Splitters are shown in orange.

1. Using the reinforcement selection switches, select the rebar set bars for which you want to create the modifier.
2. On the Rebar set contextual tab on the ribbon, clickSplitter.
3. Define how you want to place the splitter in the model.

   Click the Picking mode button on the contextual tab to cycle through the picking modes and to select the picking mode.

   Thebutton indicates that you can pick one point, and thebutton indicates that you can pick multiple points. Thebutton indicates that the splitter will be created for the selected bars only.

4. Depending on the selected picking mode, do one of the following:
   • Pick one point to create a single line splitter for the selected rebar set, bar group, or bars.
   • Pick two points to define the end points of a single line splitter. Then click the middle mouse button.
   • Pick multiple points to create a polyline splitter. Then click the middle mouse button to finish picking.
   Tip:

   If you want to create the splitter at a rounded distance from a bar end, and the dimension shown is measured from the other bar end, hold down Shift when you are placing the splitter in the model to switch the measuring point to the other bar end.

5. To end the command, press Esc.
6. To apply local modifications to the rebar set bars at the splitter location:
   1. Select the splitter.
   2. If you need to change the splitter geometry, drag the direct modification handles.
   3. Change the splitter properties on the contextual toolbar or in the property pane.
   4. If you used the property pane, click Modify to save the changes.

You can create up to two secondary guidelines for a rebar set. Secondary guidelines are shown in light blue.

1. Select a rebar set.
2. On the Rebar set contextual tab on the ribbon, clickSecondary guideline.
3. Define how you want to place the guideline in the model.

   Thebutton on the contextual tab indicates that you can pick one point, and thebutton indicates that you can pick multiple points. Click the button to change the picking mode.

4. Depending on the picking mode, do one of the following:
   • Pick one point to create a single line guideline.
   • Pick two points to define the end points of a single line guideline. Then click the middle mouse button.
   • Pick multiple points to create a polyline guideline. Then click the middle mouse button to finish picking.
5. To create another secondary guideline, repeat steps 3 and 4.

   If there are already two secondary guidelines in a rebar set, the tooltip of thebutton changes to Maximum number of secondary guidelines reached and you cannot create more guidelines.

6. Press Esc to stop creating secondary guidelines.
7. If needed, select a secondary guideline and modify its geometry and properties.

   For example, you can adjust the secondary guideline's length or spacing values.

   

   See also Distribute bars in a rebar set.

8. To set a secondary guideline as the primary guideline, select the secondary guideline and clickSet as primary on the contextual toolbar.

You can copy rebar set modifiers.

1. Select a rebar set, bar group, or bar to show its modifiers.
2. Select the modifier that you want to copy.
3. Hold down Ctrl and drag the modifier to the desired location.

   Tekla Structures creates a new modifier when you release the mouse button.

4. Select the modifier to modify its geometry and properties as needed.

If you have many rebar set modifiers in your model, it may be useful to only show some of them at a time and hide the ones that are not currently needed. You can show and hide modifiers according to their type.

1. Go to the Concrete tab and click Rebar display options.
2. Do any of the following:
   • Click Property modifier visibility to switch the property modifiers on or off.
   • Click End detail modifier visibility to switch the end detail modifiers on or off.
   • Click Splitter visibility to switch the splitters on or off.