This enumeration defines the valid types of permeable coverings.
HISTORY New enumeration in IFC2.0.
Protective screen of metal bars or wires.
Set of fixed or movable strips of wood, metal, etc. arranged to let air in while keeping light or rain out.
Upright, fixed or movable, sometimes folding framework used for protection against heat, light, access or similar.
User defined permeable covering type.
No information available.
Other.
Not known.
Unset.