{"id":457019,"date":"2021-03-05T12:28:18","date_gmt":"2021-03-05T11:28:18","guid":{"rendered":"https:\/\/bim-me-up.com\/?p=457019"},"modified":"2021-03-05T12:28:18","modified_gmt":"2021-03-05T11:28:18","slug":"general-ifc-property-sets-common-property-sets","status":"publish","type":"post","link":"https:\/\/bim-me-up.com\/en\/general-ifc-property-sets-common-property-sets\/","title":{"rendered":"Common IFC property sets (Common Property Sets)"},"content":{"rendered":"

What is the most important thing in BIM? At least everyone agrees on this question - it's about the I<\/em><\/strong>i.e. the information that is assigned to the components. In order to make this information understandable for everyone in the openBIM process, buildingSMART has also defined corresponding property sets in the IFC schema for each class, which describe the essential properties of this component. This ensures that any software in which this IFC is read out can find these properties straight away.<\/p>\n

These properties are defined as Common Property Sets and are also exported by default during IFC export from Revit, whereby it should be noted that<\/p>\n

Not all properties from the IFC schema are available in Revit by default!\u00a0<\/strong><\/p>\n

The reason for this is simple - many of these properties are probably only relevant for a few projects and having them available by default in Revit would overwhelm the user.<\/p>\n

But let's look at this in detail using the example of a wall:<\/p>\n

\"\"<\/a>Link to the current IFC 4 documentation<\/a><\/p>\n

Here we can see exactly which properties are contained in the Pset_WallCommon. For the export, it is important that the following option always remains activated:<\/p>\n

\"\"<\/a><\/p>\n

Export of standard properties available in Revit<\/h2>\n

If we now export a wall from Revit, we see the following:<\/p>\n

\"\"<\/a><\/p>\n

This means that the following parameters are automatically mapped in the case of a wall:<\/p>\n

Pset_WallCommon<\/strong>
\nExtendToStructure = Top edge is fixed. (Yes\/No)
\nIsExternal = Function (External = Yes, Internal = No)
\nLoadBearing = Load-bearing structure (Yes\/No)
\nReference = type name
\nThermalTransmittance = heat transfer coefficient (U)
\nFireRating - missing<\/em><\/span>
\nCombustible - missing<\/em><\/span>
\nSurfaceSpreadOfFlame - missing<\/em><\/span>
\nComparmentation - missing<\/em><\/span>
\nStatus - missing<\/em><\/span><\/p>\n

There are two ways to describe the missing parameters:<\/p>\n