AISC has an Excel file (AISC Shapes Database) on their website with shape properties from the steel manual. In the "Readme" section of the file it states that "the database contains some additional section properties that are not included in the Manual." One such property is h/t_w for channels. I'm having trouble figuring out exactly how they calculate this value in the spreadsheet. For wide flanges, h = d - 2*k_des. The database also provides a k_des value for channels (which isn't given in the manual either) but this isn't matching either. How is h/t_w calculated for channels?
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