IfcPermeableCoveringProperties
Definition from BS 6100: A permeable covering is a permeable
cover for an opening which allows airflow .
Definition from IAI: 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, i.e. 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 types
HISTORY New entity in IFC
Release 2.0, it had been renamed from IfcPermeableCovering in IFC
Release 2x.
Geometry Use Definitions
The IfcPermeableCoveringProperties does not hold an own geometric
representation. However it defines parameter, 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).
Interpretation of parameter
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
PanelPosition attribute.
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The panel is applied to the position
within the lining, as defined by the panel position attribute. The following
parameter apply to that panel:
- FrameDepth
- FrameThickness
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EXPRESS specification:
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| ENTITY IfcPermeableCoveringProperties
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Attribute definitions:
| OperationType
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Types of permeable covering operations. Also used to assign standard symbolic presentations according
to national building standards.
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| PanelPosition
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Position of this permeable covering panel within the overall window or door type.
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| FrameDepth
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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.
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| FrameThickness
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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.
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| ShapeAspectStyle
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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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Inheritance graph
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| ENTITY IfcPermeableCoveringProperties;
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