Ummm, yup, it is a newbie-ish question! But that's ok...
Try page 6 of the hard copy, page 51 if you're looking at a pdf.
This can on occasion be an important table. As an example, flange ratings change a bit from edition to edition of B16.5. The current edition of B16.5 is the 2009 edition. Guess which edition is the "acceptable edition" in the 2009 Div. 1? Not hugely likely, but it is possible to get "bit" by this little issue.
jt