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3.1.2-Net Section Area
In most cases, WoodWorks SIZER assumes that net area equals gross area as there is no provision in WoodWorks SIZER to specify connections that might reduce that area. For tension members you advised to use larger sections than those found using WoodWorks SIZER if the ratio of actual to allowable axial stress is close to unity.
The net area is used for shear design of notched members according to the provisions of NDS 3.4.3.2.
Net area is also used in the moment design of interior notches.
As the bending strength tends to zero near the ends of the beam, unless there is an applied moment at the end, Sizer does not calculate the bending moment strength at the inner end of end notches using the net area of the notched portions. See NDS 3.2 for more details on this issue.