To number assemblies, cast units, and rebar assemblies, use the same numbering commands as for numbering parts. Before numbering, you can modify the sort order, which defines how assemblies, cast units, and rebar assemblies are given their position numbers. Sorting does not affect part position.

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.
   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 of the assembly or cast unit, or the main reinforcement object of the rebar assembly.

        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 attribute 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.