A Construction is a combination of layers, such as a wall or a roof.
Supported Attributes:
| Attribute | Description |
|---|---|
| Id | The identification attribute based off the name. |
| constructionIsSchematic | The value for this attribute will be set to "true", if the construction originates from an analytical or schematic type. |
Supported Children:
| Element | Description |
|---|---|
| Name |
For model information, the value of the Name element is composed by the Family Name and the Family Type name. Sample: Basic Wall: Cast Concrete Wall 12". Unwanted characters are filtered out, since this can cause issues in downstream simulation applications. The following special characters are filtered out: Period("."); Apostrophe("'"); Backslash("\"); Semicolon(";"); DollarSign("$"); If the construction originates from an analytical or schematic type, the value of the Name element is collected from the name for the Analytical Construction. |
| Description |
If the construction originates from an analytical or schematic type, the value of the Description element is collected from the description for the Analytical Construction. |
| U-value |
Overall conductance. If model information is used, the value for this element is collected from the assembly or component type property Heat Transfer Coefficient (U). This value takes in account for inside and outside air film resistance. The unit attribute will always be WPerSquareMeterK. or If model information is used, the value for this element is computed by totaling the resistance (R-value) values from the materials included in the construction. |
| Absorptance | The value for this element is collected from the type property Absorptance in the group Analysis Properties if available. The unit attribute will be set to "Fraction". The type attribute will be set to "ExtIR". |
| Roughness |
The value for this element is collected from the type property Roughness if available. The number value from the property is set to an enumeration according to the following table: 1 - VeryRough 2 - MediumRough 3 - Rough 4 - Smooth 5 - MediumSmooth 6 - VerySmooth |
| LayerId | The layerIdRef attribute in this element contains a reference to the layers that comprise this construction. |
Sample:
<ConstructionconstructionIsSchematic="true"id="con-r-20overroofdeck-coolroof">
<Name>R-20 over roof deck - cool roof</Name>
<Description>ASHRAE 90.1 compliant continuous R20 insulation over roof deck-Cool roof [Source: CIBSE] </Description>
<U-valueunit="WPerSquareMeterK">0.256208</U-value>
<Absorptancetype="ExtIR"unit="Fraction">0.3</Absorptance>
<Roughnessvalue="Rough"/>
<LayerIdlayerIdRef="lay-1"/>
</Construction>