Sets the value of LiningThickness attribute. This attribute represents thickness of the door lining (see class description for more information). If LiningThickness value is 0 it denotes a door without a lining (all other lining parameters are set to 0 in this case). If the LiningThickness is unset it denotes that the value is not available.

IFC4 CHANGE: Data type modified to be IfcNonNegativeLengthMeasure.