Clear field or repeated transmittances
Clear field or repeated transmittances, depending on their type, are defined either as part of a continuous layer (typically ties, fasteners that typically have a small effect) or by inserting a composite layer (typically framing, studs, joists, rafters, mortar, battens, plaster dabs, mullions in curtain walling) in the construction layer build-up.
The use of a composite layer requires the feature to be enabled first; this is set on the ApCDB settings menu.
Enabling the composite layer tool
Once enabled the composite layer button becomes active on the construction editor dialog.
ApCDB construction layers, composite layer button, composite layer
Previous Figure shows an external wall construction with a composite layer inserted between inner and outer brickwork leaves. The composite layer comprises three input rows:
- Composite layer total row – the composite properties.
- Composite 1 - the properties and the % of the area this element fills in the layer.
- Composite 2 - the properties and the % of the area this element fills in the layer.
See the ApCDB user guide for more information on composite layers.