When using SW6 software to calculate type B flat welding flanges, what mechanical model should be selected?

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When using the SW6-20113.0 version of the calculation software to compute type B flat welding flanges, and we select the option file:///C:/DOCUME~1/ADMINI~1/LOCALS~1/Temp/msohtml1/03/clip_image002.gif, the mechanical model displayed automatically by the software is shown in the figure below; the mechanically model automatically chosen by the software is “Integral Flange (2)” file:///C:/DOCUME~1/ADMINI~1/LOCALS~1/Temp/msohtml1/03/clip_image006.gif file:///C:/DOCUME~1/ADMINI~1/LOCALS~1/Temp/msohtml1/03/clip_image008.gif file:///C:/DOCUME~1/ADMINI~1/LOCALS~1/Temp/msohtml1/03/clip_image010.jpg. However, upon referring to page 188 of GB150.3-2011, Figure 7-1 (continued), figure j), it is found that this figure is more similar to a type B flat welding flange. In my opinion, in the SW6 calculation software, selecting the mechanical model as “arbitrary flange” is closer to a type B butt weld flange. As shown in the figures file:///C:/DOCUME~1/ADMINI~1/LOCALS~1/Temp/msohtml1/03/clip_image012.gif file:///C:/DOCUME~1/ADMINI~1/LOCALS~1/Temp/msohtml1/03/clip_image014.gif, selecting different mechanical models results in significant differences in the calculated effective thickness of the flange. Because when entering the parameter \"shear plane height h1\", the two models are different, and the input data also varies. Personally, I believe that the \"shear surface height h1\" entered for \"ad hoc flanges\" better reflects the actual conditions of type B butt weld flanges. file:///C:/DOCUME~1/ADMINI~1/LOCALS~1/Temp/msohtml1/03/clip_image016.giffile:///C:/DOCUME~1/ADMINI~1/LOCALS~1/Temp/msohtml1/03/clip_image018.gif Schematic diagram of the input dimension for “Shear surface height h1” in the “General flange (2)” model and in the “Custom flange” model Schematic diagram of the input dimension for “Shear surface height h1”