Base quantities that are common to the definition of all occurrences of coverings applied to spaces.
The width of the object. Only given, if the object has constant thickness (prismatic).
Gross Area of the object. Openings, recesses, projections and cut-outs are not taken into account.
Sum of all gross areas of the covering facing the space.
Total net area of the object. Openings, recesses and cut-outs are taken into account by subtraction, projections by addition.
Sum of all net areas of the covering facing the space.