Hello everyone, on various occasions I have seen posts questioning identification of reinforcing steel or what is commonly called rebar. I came across this bit of information in a publication by the Naval Education and Training Program Development Center it is titled "Steelworker 3&2" with a stock ordering no. of 052-LP-053-2665. The table I included from this book gives a short run down on the system of identification for rebar manufacturing specifications and the meaning of some of their identification markings. Hope this can be useful to some of you. Best regards, aevald