IfcExtendedMaterialProperties
Definition from IAI: A container class for user defined properties of associated material.
This provides a mechanism to assign properties that have not been defined in IFC specification.
EXAMPLE: A set of extended material properties for energy calculation
purposes can be defined as:
| Extended Material Properties for Energy Calculation |
|
PropertyName
|
Datatype
|
Unit
|
Description
|
|
ViscosityTemperatureDerivative
|
REAL
|
kg/m-s-K
|
Viscosity temperature derivative.
|
|
MoistureCapacityThermalGradient
|
REAL
|
kg/kg-K
|
Thermal gradient coefficient for moisture capacity. Based on water vapor density.
|
|
ThermalConductivityTemperatureDerivative
|
REAL
|
W/m-K2
|
Thermal conductivity temperature derivative.
|
|
SpecificHeatTemperatureDerivative
|
REAL
|
J/kg-K2
|
Specific heat temperature derivative.
|
|
VisibleRefractionIndex
|
REAL
|
-
|
Index of refraction (visible) defines the "bending" of the sola! r ray in the visible spectrum when it
passes from one medium into another.
|
|
SolarRefractionIndex
|
REAL
|
-
|
Index of refraction (solar) defines the "bending" of the solar ray when it passes from one medium
into another.
|
|
GasPressure
|
REAL
|
Pa
|
Fill pressure (e.g. for between-pane gas fills): the pressure exerted by a mass of gas confined in a
constant volume.
|
HISTORY: New entity in Release IFC2x.
EXPRESS specification:
|
|
| ENTITY IfcExtendedMaterialProperties
|
|
Attribute definitions:
| ExtendedProperties
|
:
|
The set of material properties defined by user for this material.
|
| Description
|
:
|
Description for the set of extended properties.
|
| Name
|
:
|
The name given to the set of extended properties.
|
Inheritance graph
|
|
| ENTITY IfcExtendedMaterialProperties;
|
|