Defined in File Ifc2x3.h
IfcMaterial: public IfcUtil::IfcBaseEntity¶
IfcMaterial is a homogeneous or inhomogeneous substance that can be used to form elements (physical products or their components). IfcMaterial is the basic entity for material designation and definition; this includes identification by name and classification (via reference to an external classification), as well as association of material properties (isotropic or anisotropic) defined by (subtypes of) IfcMaterialProperties. An instance of IfcMaterial may be associated to an element or element type using the IfcRelAssociatesMaterial relationship. The assignment might either be direct as a single material information, or via
a material layer set a material profile set a material constituent set
An IfcMaterial may also have presentation information associated. Such presentation information is provided by IfcMaterialDefinitionRepresentation, associating line styles, hatching definitions or surface coloring/rendering information to a material.
HISTORYNew entity in IFC2x4
IFC2x4 CHANGE The attributes Description and Category have been added.
Name of the material.
EXAMPLE A view definition may require Material.Name to uniquely specify e.g. concrete or steel grade, in which case the attribute Material.Category could take the value ‘Concrete’ or ‘Steel’.
NOTE Material grade may have diffenrent meaning in different view definitions, e.g. strength grade for structural design and analysis, or visible appearance grade in architectural application. Also, more elaborate material grade definition may be associated as classification via inverse attribute HasExternalReferences.