Part L (2006) requires certain attributes to be entered for constructions in addition to the data required for other thermal calculations. This data is entered in the constructions database program APcdb. The additional attributes (broken down by construction category) are:
Glazing
Display window?
Tick this box if the window is a display window. Such windows are exempt from certain L2 (2006) requirements.
Transmittances
VE-SBEM requires only the g-value (BS EN 410) and the Visible light normal transmittance (bottom right).
Local shading
This is ignored by VE-SBEM.
External shading
For VE-SBEM only the Sky diffuse transmission factor is required.
Internal shading
For VE-SBEM only the Shading coefficient is required.
Doors
Door type
Select from the following types:
personnel door
vehicle access or similar large door
wall or roof element that is not to be treated as a door for the purposes of Part L
smoke vent (Note: VE-SBEM treats this as a personnel door)
high usage entrance doors
Doors of types b, d and e form special categories in Part L. Type c is provided to allow door drawing facilities in ModelIT to be used to create wall or roof elements.
Ground floors
Do not use the floor area / perimeter method to auto-calculate U values for VE-SBEM because this does not correct the value in line with EN ISO 13370.
All construction categories
Thermal bridging coefficient
This is not used by VE-SBEM. The psi values for different junction types (metal clad and non-metal clad) in Building Settings are used instead. Note however that the Metal Cladding setting in CDB will be used by VE-SBEM to determine which of the two possible psi values applies.
