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Importing the model from IFC files

When creating a new job in IFC Builder, or by using the "Import IFC" option in the "Project" group of the main toolbar, users can import a model in IFC format generated by CAD/BIM programs, such as Allplan®, Archicad®, and Revit®. This allows IFC Builder to access data from programs that have BIM (Building Information Modeling) technology and automatically incorporate the building's construction elements.

When using this option, the program launches the “Automatic entry. CAD/BIM model import" assistant, which presents the following data definition sequence:

File selection

Allows an IFC file to be selected from its location on disk.

Selection of the building to import

If the IFC file includes information on several buildings, the program requires users to select the building to be imported.

The IFC class interpreted in this step is the following:

  • IfcBuilding

Floor slabs

Allows users to view the reference and thickness of the slabs defined in the IFC file, to select the slabs to be imported, and to create and assign their typologies in IFC Builder.

The IFC class interpreted in this step is the following:

  • IfcSlab

Walls and partitions

Allows users to view the reference and thickness of the walls and partitions defined in the IFC file, to select the walls and partitions to be imported, and to create and assign their typologies in IFC Builder.

The IFC classes interpreted in this step are the following:

  • IfcWall
  • IfcWallStandardCase

Openings

Allows users to view the reference of the openings defined in the IFC file, to select the openings to be imported, and to create and assign their typologies in IFC Builder.

The IFC classes interpreted in this step are the following:

  • IfcDoor
  • IfcWindow
  • IfcOpeningElement

Import configuration

Allows users to activate the following import configuration options:

  • Import the walls on each floor on which they are present (optional)
  • Create new floors for roofs that overlap floor slabs on the same floor (optional)
  • Import the doors and windows that are not linked to architectural elements (optional)
  • Generate drawing templates (optional)
Best practice:
After importing a model in IFC format, users should check the generated geometry so that it follows IFC Builder's own modelling recommendations. Then, the spaces must be entered, as they are not read in the automatic entry process from CAD/BIM models.

The reading of IFC files and the import of their data through this assistant is unidirectional, and an update of the data cannot be performed if the information in the IFC file changes. However, in this case, a new IFC import could be carried out.