About Calculating Spaces Based on the Basic Area Calculation Standard

The Basic area calculation standard supplied with AutoCAD Architecture 2022 toolset provides a rule for the general practice of measuring gross and net area as accepted by most building inspectors and zoning officials in the US.

Space Boundary Type	Classification	boundary Objects	Wall Type	Boundary
Net	N/A	Door	Wall with adjacent spaces	Measured to centerline of door panel
Net	N/A	Opening	Wall with adjacent spaces	Measured to centerline of opening frame
Net	N/A	Walls	Wall	Measured to adjacent face
Gross	N/A	Walls	Wall without adjacent spaces	Measured to opposite face
Gross	N/A	Walls	Wall with adjacent spaces	Measured to centerline of wall

Calculation Rules for AutoCAD Objects

You can use AutoCAD objects like closed polylines or rectangles to generate a space that is deducted from an associative space. You could do this for example to represent construction spaces or otherwise unavailable areas. Since AutoCAD objects cannot be classified to control their behavior, the following standard behavior is applied to enclosed deducted spaces formed by AutoCAD objects in the Basic standard:

• Net area: the area enclosed by AutoCAD linework is deducted from the net area.
• Gross area: the area enclosed by AutoCAD linework is not deducted from the gross area.