A Construction is a combination of layers, such as a wall or a roof. If the “Export Defaults” under Energy Settings in Project Information is not checked, this element is not exported.

Supported Attributes:

Attribute	Description
Id	Unique identifier for the construction. Normally prefixed with con-.

Supported Children:

Element	Description
LayerId	The layerIdRef attribute in this element contains a reference to the layers that comprise this construction. The constructions in Revit normally consist of a single layer in order to get around the limitation in DOE2 (related to very light or heavy materials).
U-value	Overall conductance.

Sample:

<Description>ASHRAE 90.1 compliant R0 concrete or block wall</Description>

<U-value unit="WPerSquareMeterK">6.452772</U-value>

</Construction>

Revit

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Construction Element

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