Improvements in Building hierarchy
In Tekla Structures 2025, Building hierarchy has many enhancements to enable faster and more reliable project handling, and an improved way to communicate the building hierarchy in the model.
Building hierarchy commands are now by default in use. As before, you can use the XS_USE_INTEGRATED_BUILDING_HIERARCHIES advanced option to control whether
the Building hierarchy functionality is in use. By default, the advanced option is now set to TRUE.
Previously, the default value was FALSE. Note
that when the advanced option is set to TRUE, the IFC
export uses the hierarchy created in Building hierarchy. If you want to export the hierarchy created in Organizer or with advanced options, set the XS_USE_INTEGRATED_BUILDING_HIERARCHIES advanced option to FALSE.
Multiple buildings and improved hierarchy structure
You can now create multiple buildings using Building hierarchy if you have more than one building in your model.
Building hierarchy has an improved hierarchy structure. You can now create building sections in a building to more easily handle complex projects. The hierarchical structure now follows the IFC spatial structure, project > site > building > building section > building storey > space. In previous, Tekla Structures versions, building storeys were called levels.
Easy creation of building hierarchy
You can now easily create and manage building hierarchies in the new Building hierarchy side pane. The new side pane replaces the Building hierarchy dialog that was used in previous Tekla Structures versions. To start using the Building hierarchy side pane, go to the Manage tab on the ribbon and click Building hierarchy.
The commands for creating all
building hierarchy elements are on the same menu in the Building hierarchy side pane. Click the 
button to start creating a building hierarchy in the model, and then follow
the instructions in the status bar. Note that the ribbon commands for creating
levels and spaces have been removed.
The building hierarchy elements now have a property pane that you can use to modify the properties as needed.
Assign assemblies to building hierarchy elements
You can now manually assign assemblies to building hierarchy elements. Select the assembly in the model, right-click and select Building hierarchy to use the assign command. Then select the building hierarchy element. You can restore the default assignment, if needed.
Viewing building hierarchy elements in the model
You can now change the rendering of building hierarchy elements. To use the two new rendering options, go to the View tab on the ribbon and click Rendering. You can select to show the building hierarchy elements either as wireframe or as shaded wireframe.
There is also a change in the display settings of model objects. Previously, you had to set the visibility separately for the building and space. Now this has been simplified so that you only set the visibility for the building.