2018 Table of Contents

Faster rebar sets and other reinforcement improvements

Last updated March 16, 2018 by Tekla User Assistance tekla.documentation@trimble.com

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Faster rebar sets and other reinforcement improvements

Faster rebar sets and other reinforcement improvements

Tekla Structures 2018 comes with many important reinforcement improvements. For example, selecting, numberingprocess of assigning position numbers to parts, cast units, assemblies, or reinforcement

In Tekla Structures, the position numbers assigned in the numbering are shown in marks and templates, for example.

, and grouping of rebar set bars have been improved.

Rebar set performance improvements

In Tekla Structures 2018, there are many improvements that enhance performance in models that contain rebar sets. For example, numbering and selecting rebar sets, opening 3D model views, and creating and opening general arrangement drawings are now faster. Also the rebar set bars are not regenerated as frequently as before, which improves the performance.

New selection switches

Tekla Structures 2018 introduces three new selection switches for selecting bars within rebar sets.

Using these switches, you can either select entire rebar sets, bar groups in rebar sets, or individual bars in rebar sets.

Now you can hide, inquire, create reports for, and define user-defined attributes for individual bars or bar groups in rebar sets. Note that you cannot delete, copy, or move individual rebar set bars or bar groups, or change their phase, for example.

All the three new selection switches also select single reinforcing bars, bar groups, reinforcement meshes, and strands.

Adding leg faces to rebar sets

To easily add new leg faces to a selected rebar set, and to create reinforcing bars at the leg faces, you can now click the new button on the contextual toolbarfloating toolbar that contains commands for modifying the most common object properties

The user can customize the contextual toolbar.


Then select each concrete part face or pour objectbuilding object that is formed of one or more cast-in-place concrete parts, or parts of cast-in-place concrete parts

The cast-in-place concrete parts are merged into one pour object if they have the same material grade and pour phase, and if they touch each other. Pour objects are visible in pour view.

face at which you want to create a new leg faceplane that defines where the reinforcing bar legs are created in a rebar set

Tekla Structures creates rebar set leg faces at the reinforced faces of concrete parts or pour objects, or according to the points picked when creating a rebar set.

with the reinforcing bars. You can also select curved faces.

Rebar set splitter improvements

Vertical rebar set splitters now also work in the inside and outside corners of concrete objects. Splitters can be used to create hooks with fixed leg lengths, for example.

Grouping bars in rebar sets

  • Automatic bar groups within rebar sets may now contain similar bars from more than one adjacent spacing zones. To allow this, set the new advanced option XS_​REBARSET_​ENABLE_​BAR_​GROUPING_​WHEN_​SPACING_​DIFFERS to TRUE.
  • The same user-defined attributes that affect numbering now affect the grouping of rebar set bars. If this kind of user-defined attributeobject property created by the user in order to widen the range of predefined object properties

    User-defined attributes are used when the predefined object properties are not sufficient but more properties are needed. For example, comment, locked, and erection status are user-defined attributes.

    is defined for an individual bar, the group to which the bar belongs will be ungrouped.

Position numbers for bars in linearly tapered rebar sets

Tekla Structures 2018 introduces many new settings that you can use to define and show position numbers for rebar set bars in drawings and reports.

  • With the new advanced option XS_​REBARSET_​USE_​GROUP_​NUMBER_​FOR_​BARS_​IN_​TAPERED_​​GROUPS you can define whether the reinforcing bars in each linearly tapered bar group within a rebar set are numbered using the group number ( TRUE ) or as individual bars ( FALSE ).
  • With the new advanced option XS_​​REBARSET_​​TAPERED_​​GROUP_​​POSITION_​​NUMBER_​​FORMAT_​​STRING you can define how the new tapered reinforcing bar groupgroup of reinforcing bars that are side by side and have identical properties, except the possible variation in bar lengths

    position numberidentifier that is assigned to all similar parts, assemblies, cast units, or reinforcement

    Position number consists of a prefix, separator, and running number. The prefix is part of the position number, identifying a numbering series. The running number is part of the position number, and is the assigned number in the numbering series, based on the start number. The separator is an optional character, such as a slash, that separates the prefix and the running number.

    In Tekla Structures, the position numbers assigned in the numbering are shown in marks and templates, for example.

    In the US, the term piece mark or ship mark is used to refer to a position number.

    GROUP_POS is structured.
  • With the new advanced option XS_​REBARSET_​TAPERED_​REBAR_​POSITION_​NUMBER_​FORMAT_​STRING you can define how the position number REBAR_POS of single bars in tapered bar groups is structured.
  • With the new advanced option XS_​VALID_​CHARS_​FOR_​REBAR_​SUB_​ID_​WITH_​LETTERS you can specify the valid characters for 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.

    sub IDs when they are shown by the new format string attribute SUB_​ID_​WITH_​LETTERS.

Numbering reinforcement meshes

Use the new advanced option XS_IGNORE_​CROSSBAR_​LOCATION_​IN_​REBAR_​MESH_​NUMBERING to define whether the location of the crossing bars (e.g. above or below the main bars) affects the numbering of the reinforcement meshes or not. The default value is FALSE , which means that the crossing bar location is taken into account when meshes are numbered. The otherwise identical meshes receive different numbers if the crossing bars are on the different sides of the main bars.

Reinforcement improvements in drawings

Tekla Structures 2018 introduces some improvements in reinforcement behavior and appearance, such as preventing overlapping rebars, new option to show single lines with filled ends, and solid lines at rebar ends.

Rebars no longer overlapping in drawings

  • All reinforcing bar groups are now adjusted correctly and visible when you set Visibility of reinforcing bars in group to bar in the middle of group. Previously, reinforcing bar groups were adjusted if you only had two layers of bars, and Tekla Structures often placed bars from different groups on top of each other in drawings. You could not trust that all bars were visible just by looking, and a lot of manual work was needed to clean up the drawing.

    In the example below, there are three similar rebar groups on top of each other in the model. In the drawing, one bar in the middle of the group is now shown for each of them.

New rebar representation option: single line with filled ends

  • A new option single line with filled ends has been added in rebar representationthe way that the information included in a model is represented visually

    to be used especially in section views. This option shows a different representation for parallel and perpendicular bars.

Reinforcing bar end symbols drawn with solid lines

  • To improve clarity in drawings, the reinforcing bar end symbols are now always drawn in solid line type, regardless of the actual reinforcement line type defined in drawing reinforcement properties.

    Before the improvement:

    After the improvement:

Rebar set groups now keep their settings better

  • Rebar set groups in drawings can lose their dimensions, marks, and visibility/representation settings after groups of bars are modified in, added to or deleted from a rebar set in a model. Improvements have now been made to ensure this happens much less frequently.


You can now use the new advanced option XS_​DRAW_​REBAR_HIDDEN_​FACES in the Advanced Options category Drawing Properties to control whether the hidden faces of the rebars are shown in drawings. Setting it to TRUE shows the hidden faces of rebars. FALSE is the default value.

Previously, the advanced option XS_​DRAW_​HIDDEN_​FACES was used to control both hidden part faces and hidden faces of rebars. Now XS_​DRAW_​HIDDEN_​FACES only controls hidden part faces.

In the first image below, XS_​DRAW_​REBAR_HIDDEN_​FACES has been set to TRUE.

In the image below, XS_​DRAW_​REBAR_HIDDEN_​FACES has been set to FALSE.

New template and format string attributes

Also a new format string attribute SUB_​ID_​WITH_​LETTERS is now available. It is not available as a template attributeattribute in a template object that Tekla Structures uses to calculate and display information from a model database

Template attributes represent object properties.


Other reinforcement improvements

  • When you select rebar sets, or bars in rebar sets, and then right-click, the Attach to Part and Detach from Part commands are now available on the pop-up menu.

    Also the following commands now work with rebar set bars in cast-in-place concretecast unit type where the concrete is formed, poured, and cured in its final position


    • Pour > Add to pour unit
    • Pour > Remove from pour unit
  • When you create a new corner point to a rebar set guidelinedefinition of the distribution and direction of the reinforcing bars in rebar sets

    The spacing of the reinforcing bars is measured along the rebar set guideline. The rebar set guideline can be a line, or a polyline that may have corner chamfers.

    by dragging a midpoint handle, the corner point now has the None chamfer. Previously, the new corner points had Arc point chamfers by default.
  • You can now show and report the reinforcing bar GUID , REBAR_POS , and user-defined attributes without the REBAR. prefix on the SINGLE_REBAR template rows.
  • A new option STL can now be used in bending shape rules in Rebar shape manager. STL is the total length of the spiral bar when the bar is installed on site.
  • In bending shape rules in Rebar shape manager , spiral length SL is now the distance between the reference points of the spiral bar.
  • In bending shape rules in Rebar shape manager , center line length CLL is now available for curved and circular bars.

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