Thank you SlideRuleEra for your reply. The reason I ask, is because for several years, the contractor I work most closely with, has been wanting my firm to conform to the other architect and engineering firms that they work with. Those other firms have been specifying 1/2" anchors (w/o galvanizing or stainless) based on the 2003 International Residential Code.
Through research, I have spoken to the key structural code reviewers for the state of Wisconsin, who, though they may agree that the 1/2" anchors may be effective, the IBC simply states as stated in 2304.9.5.
I'd love to join the crowd, but code will not permit. Does anyone know of any way, that I might be over-looking, that might permit me to specify 1/2" anchors? What does AF&PA Technical Report No. 7 say?