|Festdefinierte Merkmale einer luftdurchlässigen Abdeckung|
This entity is a description of a panel within a
door or window (as fillers for opening) which allows for air
flow. It is given by its properties
(IfcPermeableCoveringProperties). A permeable covering is
a casement, such as a component, fixed or opening, consisting
essentially of a frame and the infilling. The infilling is
normally a grill, a louver or a screen. The way of operation is
defined in the operation type.
The IfcPermeableCoveringProperties are included in the
list of properties (HasPropertySets) of the
IfcWindowStyle or the IfcDoorStyle. More
information about the permeable covering can be included in the
same list of the window or door style using the
IfcPropertySet for dynamic extensions. This particularly
applies for additional properties for the various operation
HISTORY New entity in IFC2.0, it had been renamed from
IfcPermeableCovering in IFC2x.
IFC4 CHANGE Supertype changed to new IfcPreDefinedPropertySet.
Geometry use definitions
The IfcPermeableCoveringProperties does not hold a geometric representation. However it defines parameters which can be used to create the shape of the IfcWindowStyle (which is inserted by the IfcWindow into the spatial context of the project), or of the IfcDoorStyle (which is inserted by the IfcDoor).
The parameters at the IfcPermeableCoveringProperties define a standard permeable covering. The outer boundary of the panel is determined by the occurrence parameter assigned to the
IfcWindow or IfcDoor. It has to take the lining parameter into account as well. The position of the permeable covering within the overall window or door is determined by the
Figure 259 illustrates the panel applied to the position within the lining, as defined by the panel position attribute. The following parameters apply to that panel: FrameDepth, FrameThickness.
Figure 259 — Permeable covering properties
XSD Specification: <xs:element name="IfcPermeableCoveringProperties" type="ifc:IfcPermeableCoveringProperties" substitutionGroup="ifc:IfcPreDefinedPropertySet" nillable="true"/>
<xs:element name="ShapeAspectStyle" type="ifc:IfcShapeAspect" nillable="true" minOccurs="0"/>
<xs:attribute name="OperationType" type="ifc:IfcPermeableCoveringOperationEnum" use="optional"/>
<xs:attribute name="PanelPosition" type="ifc:IfcWindowPanelPositionEnum" use="optional"/>
<xs:attribute name="FrameDepth" type="ifc:IfcPositiveLengthMeasure" use="optional"/>
<xs:attribute name="FrameThickness" type="ifc:IfcPositiveLengthMeasure" use="optional"/>
|OperationType|| : ||Types of permeable covering operations. Also used to assign standard symbolic presentations according to national building standards.
|PanelPosition|| : ||Position of this permeable covering panel within the overall window or door type.|
|FrameDepth|| : ||Depth of panel frame (used to include the permeable covering), measured from front face to back face horizontally (i.e. perpendicular to the window or door (elevation) plane.|
|FrameThickness|| : ||Width of panel frame (used to include the permeable covering), measured from inside of panel (at permeable covering) to outside of panel (at lining), i.e. parallel to the window or door (elevation) plane.|
|ShapeAspectStyle|| : ||Optional link to a shape aspect definition, which points to the part of the geometric representation of the window style, which is used to represent the permeable covering.|
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