Did you know that logged in users can see a lot more content?

2019i Table of Contents


Last updated September 10, 2019 by Tekla User Assistance tekla.documentation@trimble.com

Software version: 



Category : 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.

Use to define the contents of the assembly position numberposition number that is assigned to an assembly or a cast unit



Do not change this advanced option after you have created single-part, assembly, or cast unit drawings, if you are using cloning. It may partially separate the drawings from the part they represent, causing the drawings to be flagged as deleted and other drawings to be cloned after the next numbering.

The options are:




Assembly prefix, defined in the part properties dialog box.


The running assembly position number, starting from the start number defined in the part properties dialog box.


Same as above, but with letters.

Uses letters A – Z by default, but you can also define valid letters with the advanced option XS_VALID_CHARS_FOR_ASSEMBLY_POSITION_NUMBERS.


User-defined attribute of the assembly or assembly main part. If the attribute is defined for the assembly, it will be used. If it is not defined, the main part attribute will be used. You can also define that only the user-defined attribute of the main part will be used, for example %UDA:MAINPART.USER_FIELD_1%.


Template attribute of the assembly or assembly main part, for example % TPL:PROJECT.NUMBER%.

This advanced option is model specific and the setting is saved in the options databasedatabase file that contains the settings of model-specific general settings and advanced options

There are two options databases, the model options database (options_model.db) and the drawing options database (options_drawings.db).


Number of characters in the assembly position number

You can define the number of characters by adding a period and the required number to the end of the options %ASSEMBLY_POS_WITH_LETTERS% and %ASSEMBLY_POS%. For example, %ASSEMBLY_POS_WITH_LETTERS.3% will result in three letters for every assembly, starting from AAA.


If you set the advanced option to %ASSEMBLY_PREFIX%/%ASSEMBLY_POS.3% , the result will be A/001.

Quick feedback

The feedback you give here is not visible to other users. We use your comments to improve our content.
We use this to prevent automated spam submissions.
Content rating: 
No votes yet