REVIT IFC MANUAL
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46 | Autodesk Revit <strong>IFC</strong> manual<br />
6.3 Assigning assemblies<br />
Assemblies are important for the higher-level grouping of components and are often used for truss<br />
fields, beam grids and reinforcement cages. Unlike the grouped elements in Revit, the assemblies<br />
are also transferred during <strong>IFC</strong> export and can have higher-level properties.<br />
The reinforced bars and brackets of a floor slab are assigned to an assembly in this example:<br />
The <strong>IFC</strong> parameters are overwritten in the process:<br />
Revit component IfcExportAs IfcObjectTypeOverride<br />
Reinforcement IfcElementAssembly REINFORCEMENT_UNIT<br />
In the <strong>IFC</strong> data model, assigning this class and applying the instance parameter “IfcObjectTypeOverride’”<br />
defines the predefined type as “REINFORCEMENT_UNIT” and aggregates the higher-level assembly<br />
as “IfcElementAssembly.”<br />
The individual assembly elements can still be selected separately. This assignment provides a better<br />
structure within the <strong>IFC</strong> model for the evaluation and classification of components.<br />
INSTRUCTIONS FOR <strong>REVIT</strong> USERS
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