Next, the natural step is to show our readers how to export IFC using the various popular programs available on the market today. Recently, Janusz presented this process using the Tekla Structures:. Today I will tell you how to do it correctly using Revit. Since exporting to IFC from this software can be a quite challeging task, I have divided this topic into 4 parts:. Thanks to this series, you will be able to adjust your Revit IFC export to your individual needs.
There is a lot to talk about. At first glance, exporting a model to IFC from Revit seems very simple and can be described in two simple steps. Step 1. Create the appropriate 3D view which contains all the model elements which you want to export. If you are a person who is responsible for export, you need to know such things. In order to meet such requirements , proper export preparation is a must.
Now I will show you the first step of such preparations. I will tell you about IFC class mapping. Simply put, you can treat IFC classes as different Revit family categories. Such table looks like this:. On the left we have the Revit categories, and on the right we have the names of the IFC classes to which the given category will be exported. In this way, the given Revit category will be exluded from export.
You can find the full list of IFC classes here:. For example, for a Railing , I write the name and I immediately get the searched result. In this case, IfcRailing. However, you must know that a lot of IFC classes have no equivalent in Revit categories. Revit has far fewer categories than there are classes in the IFC schema. One is a Boiler and the other is a Heat Pump.
In Revit, they will be classified under the Mechanical Equipment category as shown in the picture :. Now, when we look at the mapping table in Revit, we will see that the Mechanical Equipment category has only one item one row that maps its elements. Additionally, by default, all elements of the Mechanical Equipment category will be mapped to IfcBuildingElementProxy class. IFC viewer eg Solibri will treat such element as general building element and puts it into Object category.
However, there is a way to export these 2 components correctly to their IFC classes. Revit has a set of parameters that can be used for mapping. In our case we will use the parameter called IfcExportAs. As a value, we just enter the name of the IFC class which we want to assign a given element see Fig.
Using this parameter, we can overwrite the default mapping that is specified in the mapping table. The developers of the IFC exporter have created a set of shared parameters that we can use to prepare our model for export. Among these parameters, there is also the above-mentioned IfcExportAs parameter. The default location where the parameter file is located is following:. Of course, the year number may differ depending on the version of Revit and Exporter you are using.
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Back to Revit Products Category. Back to Topic Listing Previous Next. Filter by Lables. Message 1 of 3. You might also like How to open an IFC file, view and edit its properties. IFC objects OmniClass classification. IFC and classification systems in the construction industry. BIM maturity Levels: from stage 0 to stage 3. IFC coordinate system. Converting a 3D model into an IFC format. ACCA software S. Read More OK.
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