cira concrete code 1920

huangyhg

cira concrete code 1920
does anyone here have a clue to what circa is and were i can find a copy of it.  to the best of my knowledge it is a concrete code, but no one seems to of heard about it.
thanks
i believe that the word "circa" means "approximately" or "around"....in other words, if you see the term
circa 1920.....it means around the year 1920.
after futher clarification with the client i believe you are correct in saying that they are looking for information on concrete design standards from the 20's.  however in my research of things i can only go as far as the 50's.  any help please??
contact the american concrete institute (aci) or the portland cement association (pca), both should have some historical information for us codes.
all ready tried they only go as far as 56.  i've got a guy sending information from crsi which is suppose to have information on evaluation of reinforcing bars in old reinforced concrete structures.
jmendler,
i have the crsi text your refer to (it is okay for the $10 purchase cost) but there is also a free engineering data report #48 available in pdf format at crsi (