Sorry, this page is not on the site.
You can see the material you are interested here:
Or use the search in the header.
U.S. rebar sizes: Imperial rebar designations represent the rebar diameter in fractions of 1/8 inch, such that #8 = 8/8 inch = 1 inch diameter. Area = (bar size/9) 2 such that area of #8 = (8/9)2 = 0.79 inch. This applies to #8 rebars and smaller. Larger rebars have a slightly larger diameter than the one computed using the 1/8 inch convention.