Definition of net area : the part of the cross-sectional area of a masonry unit effective in carrying load.

How do you find net area?

The net area at any section is equal to the gross area minus the deduction for holes at that section. The deduction for the hole is the product of the hole diameter and the thickness of the material.

Does net area include walls?

Net Square Footage (NSF) The Net Square Footage is the total square footage of all the rooms/areas on a floor. This includes assignable and non-assignable rooms. Note: NSF calculations do not include wall thickness or space that is open to below.