Sets the value of OverallWidth attribute. This attribute represents overall measure of the width, it reflects the X Dimension of a bounding box, enclosing the body of theE door opening. If omitted, the OverallWidth should be taken from the geometric representation of the IfcOpening in which the door is inserted.

The body of the door might be wider then the door opening (e.g. in cases where the door lining includes a casing). In these cases the OverallWidth is still specified as the door opening width, and not as the total width of the door lining.