IfcStructuralLoadTemperature

BACnet MVD

#### IfcStructuralLoadTemperature

Natural language names

| Temperaturlast
| Structural Load Temperature

Change log

Item | SPF | XML | Change | Description
--- | --- | --- | --- | ---
IFC2x3 to IFC4
IfcStructuralLoadTemperature |  |  |  |
DeltaTConstant |  | X | MODIFIED | Name changed from DeltaT_Constant to DeltaTConstant.
DeltaTY |  | X | MODIFIED | Name changed from DeltaT_Y to DeltaTY.
DeltaTZ |  | X | MODIFIED | Name changed from DeltaT_Z to DeltaTZ.

##### Semantic definitions at the entity

Entity definition

An instance of the entity IfcStructuralLoadTemperature shall be used to define actions which are caused by a temperature change. As shown in Figure 383, the change of temperature is given with a constant value which is applied to the complete section and values for temperature differences between outer fibres of the section.

> HISTORY New entity in IFC2x2.

Figure 383 — Structural load temperature

Attribute definitions

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---

2

DeltaTConstant

IfcThermodynamicTemperatureMeasure

?

Temperature change which affects the complete section of the structural member, or the uniform portion of a non-uniform temperature change.

> NOTE A positive value describes an increase in temperature. I.e. a positive constant temperature change causes elongation of a member, or compression in the member if there are respective restraints.

X

3

DeltaTY

IfcThermodynamicTemperatureMeasure

?

Non-uniform temperature change, specified as the difference of the temperature change at the outer fibre of the positive y direction minus the temperature change at the outer fibre of the negative y direction of the analysis member.

> NOTE A positive non-uniform temperature change in y induces a negative curvature of the member about z, or a positive bending moment about z if there are respective restraints. y and z are local member axes.

X

4

DeltaTZ

IfcThermodynamicTemperatureMeasure

?

Non-uniform temperature change, specified as the difference of the temperature change at the outer fibre of the positive z direction minus the temperature change at the outer fibre of the negative z direction of the analysis member.

> NOTE A positive non-uniform temperature change in z induces a positive curvature of the member about y, or a negative bending moment about y if there are respective restraints. y and z are local member axes.

X

##### Inherited definitions from supertypes

Entity inheritance
Attribute inheritance

# | Attribute | Type | Cardinality | Description | B
--- | --- | --- | --- | --- | ---
IfcStructuralLoad
1 | Name | IfcLabel | ? | Optionally defines a name for this load. |  | X
IfcStructuralLoadOrResult
IfcStructuralLoadStatic
IfcStructuralLoadTemperature

2

DeltaTConstant

IfcThermodynamicTemperatureMeasure

?

Temperature change which affects the complete section of the structural member, or the uniform portion of a non-uniform temperature change.

> NOTE A positive value describes an increase in temperature. I.e. a positive constant temperature change causes elongation of a member, or compression in the member if there are respective restraints.

X

3

DeltaTY

IfcThermodynamicTemperatureMeasure

?

Non-uniform temperature change, specified as the difference of the temperature change at the outer fibre of the positive y direction minus the temperature change at the outer fibre of the negative y direction of the analysis member.

> NOTE A positive non-uniform temperature change in y induces a negative curvature of the member about z, or a positive bending moment about z if there are respective restraints. y and z are local member axes.

X

4

DeltaTZ

IfcThermodynamicTemperatureMeasure

?

Non-uniform temperature change, specified as the difference of the temperature change at the outer fibre of the positive z direction minus the temperature change at the outer fibre of the negative z direction of the analysis member.

> NOTE A positive non-uniform temperature change in z induces a positive curvature of the member about y, or a negative bending moment about y if there are respective restraints. y and z are local member axes.

X

##### Formal representations

XML Specification
`<xs:element name="IfcStructuralLoadTemperature" type="ifc:IfcStructuralLoadTemperature" substitutionGroup="ifc:IfcStructuralLoadStatic" nillable="true"/>
<xs:complexType name="IfcStructuralLoadTemperature">
<xs:complexContent>
<xs:extension base="ifc:IfcStructuralLoadStatic">
<xs:attribute name="DeltaTConstant" type="ifc:IfcThermodynamicTemperatureMeasure" use="optional"/>
<xs:attribute name="DeltaTY" type="ifc:IfcThermodynamicTemperatureMeasure" use="optional"/>
<xs:attribute name="DeltaTZ" type="ifc:IfcThermodynamicTemperatureMeasure" use="optional"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
`
EXPRESS Specification
`ENTITY IfcStructuralLoadTemperature
SUBTYPE OF (IfcStructuralLoadStatic);
DeltaTConstant : OPTIONAL IfcThermodynamicTemperatureMeasure;
DeltaTY : OPTIONAL IfcThermodynamicTemperatureMeasure;
DeltaTZ : OPTIONAL IfcThermodynamicTemperatureMeasure;
END_ENTITY;

EXPRESS-G diagram

`

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