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Number assemblies and cast units

Last updated March 12, 2019 by Tekla User Assistance tekla.documentation@trimble.com

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Number assemblies and cast units

Number assemblies and cast units

To number assemblies and cast units, use the same 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.

commands as for numbering parts. Before numbering, you can modify the sort order, which defines how assemblies and cast units are given their position numbers. Sorting does not affect part positionposition number that is assigned to a part


  1. If needed, modify the sort order of assemblies and cast units.
    1. On the Drawings & reports tab, click Numbering settings > Numbering settings to open the Numbering Setup dialog box.
    2. Modify the sort order by selecting options from the Sort by and Then by lists.

      The default sort order is XYZ. You have the following options:

      • The x, y or z coordinates of the main part(1) part that exists in a building object and that determines the position number for the assembly or cast unit and the direction of assembly or cast unit drawings

        (1) Main part can be an assembly main part or a cast unit main part.

        (2) input part that the user selects first when creating a component

        (2) Connections and details always have a component main part.

        of the assembly or cast unit

        The sorting is based on the center of gravity (COG) location of the assembly or cast unit. Tekla Structures finds the center of gravity for each assembly and cast unit and compares them in the order you defined.

      • The 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.

        of an assembly or the main part

        If your sorting is based on user-defined attributes, Tekla Structures displays a list that includes all the available user-defined attributes.

    3. Click Apply or OK to save the changes.
  2. If needed, modify the other numbering settings.
  3. On the Drawings & reports tab, click Perform numbering > Number modified objects to number the model.

If you add new parts in the model, parts that have already been numbered are not renumbered to suit the sorting order. In this case you should check and repair the numbering of those parts.

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