IfcSurfaceReinforcementArea

Natural language names
deOberfläche - Bewehrungsfläche
enSurface Reinforcement Area
Change log
ItemSPFXMLChangeDescription
IFC2x3 to IFC4
    IfcSurfaceReinforcementAreaADDED
Semantic definitions at the entity
Entity definition

Describes required or provided reinforcement area of surface members.

NOTE  Member design parameters like concrete cover, effective depth, orientation of meshes or rebars (two, optionally three directions) etc. are not specified in IfcStructuralLoadResource schema. They shall be specified at the level of structural members.
HISTORY  New entity in IFC4.
Attribute definitions
#AttributeTypeCardinalityDescription C
2SurfaceReinforcement1IfcLengthMeasureL[2:3] Reinforcement at the face of the member which is located at the side of the positive local z direction of the surface member. Specified as area per length, e.g. square metre per metre (hence length measure, e.g. metre). The reinforcement area may be specified for two or three directions of reinforcement bars.X
3SurfaceReinforcement2IfcLengthMeasureL[2:3] Reinforcement at the face of the member which is located at the side of the negative local z direction of the surface member. Specified as area per length, e.g. square metre per metre (hence length measure, e.g. metre). The reinforcement area may be specified for two or three directions of reinforcement bars.X
4ShearReinforcementIfcRatioMeasure[0:1] Shear reinforcement. Specified as area per area, e.g. square metre per square metre (hence ratio measure, i.e. unitless).X
Formal Propositions
RuleDescription
SurfaceAndOrShearAreaSpecifiedAt least one of the reinforcement area attributes shall be specified.
NonnegativeArea1Surface reinforcement area must not be less than 0.
NonnegativeArea2Surface reinforcement area must not be less than 0.
NonnegativeArea3Shear reinforcement area must not be less than 0.
Inherited definitions from supertypes
Entity inheritance IfcStructuralLoadOrResult IfcStructuralLoad
Attribute inheritance
#AttributeTypeCardinalityDescriptionC
IfcStructuralLoad
1NameIfcLabel[0:1] Optionally defines a name for this load.X
IfcStructuralLoadOrResult
IfcSurfaceReinforcementArea
2SurfaceReinforcement1IfcLengthMeasureL[2:3] Reinforcement at the face of the member which is located at the side of the positive local z direction of the surface member. Specified as area per length, e.g. square metre per metre (hence length measure, e.g. metre). The reinforcement area may be specified for two or three directions of reinforcement bars.X
3SurfaceReinforcement2IfcLengthMeasureL[2:3] Reinforcement at the face of the member which is located at the side of the negative local z direction of the surface member. Specified as area per length, e.g. square metre per metre (hence length measure, e.g. metre). The reinforcement area may be specified for two or three directions of reinforcement bars.X
4ShearReinforcementIfcRatioMeasure[0:1] Shear reinforcement. Specified as area per area, e.g. square metre per square metre (hence ratio measure, i.e. unitless).X
Formal representations
XSD Specification
 <xs:element name="IfcSurfaceReinforcementArea" type="ifc:IfcSurfaceReinforcementArea" substitutionGroup="ifc:IfcStructuralLoadOrResult" nillable="true"/>
 <xs:complexType name="IfcSurfaceReinforcementArea">
  <xs:complexContent>
   <xs:extension base="ifc:IfcStructuralLoadOrResult">
    <xs:attribute name="SurfaceReinforcement1" use="optional">
     <xs:simpleType>
      <xs:restriction>
       <xs:simpleType>
        <xs:list itemType="ifc:IfcLengthMeasure"/>
       </xs:simpleType>
       <xs:minLength value="2"/>
       <xs:maxLength value="3"/>
      </xs:restriction>
     </xs:simpleType>
    </xs:attribute>
    <xs:attribute name="SurfaceReinforcement2" use="optional">
     <xs:simpleType>
      <xs:restriction>
       <xs:simpleType>
        <xs:list itemType="ifc:IfcLengthMeasure"/>
       </xs:simpleType>
       <xs:minLength value="2"/>
       <xs:maxLength value="3"/>
      </xs:restriction>
     </xs:simpleType>
    </xs:attribute>
    <xs:attribute name="ShearReinforcement" type="ifc:IfcRatioMeasure" use="optional"/>
   </xs:extension>
  </xs:complexContent>
 </xs:complexType>
EXPRESS Specification
ENTITY IfcSurfaceReinforcementArea
 SUBTYPE OF (IfcStructuralLoadOrResult);
  SurfaceReinforcement1 : OPTIONAL LIST [2:3] OF IfcLengthMeasure;
  SurfaceReinforcement2 : OPTIONAL LIST [2:3] OF IfcLengthMeasure;
  ShearReinforcement : OPTIONAL IfcRatioMeasure;
 WHERE
  SurfaceAndOrShearAreaSpecified : EXISTS(SurfaceReinforcement1) OR EXISTS(SurfaceReinforcement2) OR EXISTS(ShearReinforcement);
  NonnegativeArea1 : (NOT EXISTS(SurfaceReinforcement1)) OR ( (SurfaceReinforcement1[1] >= 0.) AND (SurfaceReinforcement1[2] >= 0.) AND ((SIZEOF(SurfaceReinforcement1) = 1) OR (SurfaceReinforcement1[1] >= 0.)) );
  NonnegativeArea2 : (NOT EXISTS(SurfaceReinforcement2)) OR ( (SurfaceReinforcement2[1] >= 0.) AND (SurfaceReinforcement2[2] >= 0.) AND ((SIZEOF(SurfaceReinforcement2) = 1) OR (SurfaceReinforcement2[1] >= 0.)) );
  NonnegativeArea3 : (NOT EXISTS(ShearReinforcement)) OR (ShearReinforcement >= 0.);
END_ENTITY;

Link to EXPRESS-G diagram EXPRESS-G diagram

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