4. FILLING IN PROPERTIES

Now that all the settings have been made, you can start filling in the object properties.

For each project phase, you will:

  • PHASE X (APS or other, no obligation to start at phase 1) :
    • Load the configuration file “CRTI-B Classification ARCHICAD – phase X Vx.x
    • Fill in the information for each object
    • Adjust the export IFC translator
    • Exporting the IFC
  • PHASE X+1
    • Load the configuration file “CRTI-B Classification ARCHICAD – phase X+1 Vx.x
    • Fill in the information
    • Adjust the export IFC translator
    • Exporting the IFC

A. Load the configuration file

Load the configuration file corresponding to the current phase: see “2. Implementation of properties“.

INFO: if this is the 2nd time or more that you load a classification, you will get a warning about the properties, you will have to click on “Replace” to avoid deleting the content of the properties already filled.

Tutorial of the manipulations :

B. IFC mapping of each object

For each object, it must be associated with an entry in the classification.

The IFC classification and type of an object is defined via the Archicad classification system. Each entry in the Archicad classification is associated with an IFC class and a type (predefined or custom). When associating an object of the model with an entry of the classification, the IFC mapping is also defined:

  • In translator : classification entry <-> IFC class and type
  • In property of an object : entry classification <-> associated object

To associate an object with a classification entry, select the object -> open its properties -> expand the “Classification and properties” group and navigate in the “Archicad 2.0 Classification” tree to find the corresponding entry. After association, you can see in the window the IFC class and type associated with the object in question (red frames).

If the mapping is not suitable, it is possible to change the IFC class and type in the translator, although it is preferable to choose the correct classification entry that has the required mapping.

Tutorial of the manipulations :

C. Fill in the properties

For each object, you now have access to the properties defined in the GID sheets and you can complete them. The properties are defined by default without value: select the paperclip in front of the property -> select “custom (value)” -> encode the value or choose from the drop-down list.

INFO: If the desired value is not in the drop-down list, open the property manager -> search for the desired property and select it -> click on “set options…” -> “add” and edit the list of values -> “OK” -> “OK”. -> “add” and edit the list of values -> “OK” -> “OK”

INFO: if a property is missing in an object, there are 2 steps to remedy it:

  • Check that the object has been associated to an entry of the Archicad 2.0 classification, see point 2 above
  • If the property is missing: go to the classification manager -> open the tree until you reach the corresponding entry associated with the object -> associate the missing property to the classification entry via .

Tutorial of the manipulations :

D. Precautions and details

It should be noted that some properties or attributes do not work satisfactorily. It is therefore the responsibility of the modeler to check if each required property is present, before and after IFC export, see also 5. Quality control before IFC export and 7. Control and export of the IFC. We have also noticed that the mapping of the “built in” properties is problematic for some objects, notably “Renovation state”, “Structural function” and “Position”. So in some cases we have duplicated the built-in property and it is this duplicated property that needs to be completed. You only have to review the properties displayed in the objects to know if this is the case or not. We have listed below the cases concerned.

  • NUMERICAL IDENTIFIER: not available for “Zone” (group of rooms).
  • RENOVATION STATUS : Use the custom property “IFC 4 RENOVATION STATUS” for IFC mapping (IFC4 only) for “Gutter”, “Sanitary – Equipment”, “Ventilation – Mouth”, “Ventilation – Fan”, “Electricity – Light”, Electricity – Security Light”, “Electricity – device”, “Data – device”, “Fire – coupler”, “Fire – terminal”, “Fire – hose reel”, “Fire – sprinkler”, “Fire – protective cabinet”, “Fire – extinguisher”, “Furniture”.
    • INFO: Note that the built-in property can be used for phase filtering.
  • MATERIAL: the attribute is not available for “Door”, “Window” and “Gutter”.
  • Bearing Element: uses the custom property “ARCHICAD Structural Function” for mapping (IFC4 only) of “Threaded foundation”, “Insulated foundation”, Slab on grade (bearing or non-bearing), “Foundation sill”, “Technical floor”.
  • POSITION : use the custom property “ARCHICAD Position” for the mapping (IFC 4 only) of “Gutter” and “Furniture
  • CLASSIFICATION UNIFORMAT : pas disponible pour “Zone” (groupe de locaux).

Next step of the guide: 4.1. Mapping Archicad classification

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