We are performing a structural analysis on a very old reinforced concrete structure and in the drawings I ran into a "#14S" rebar. I think it is a "special" sized reinforcing bar. Anyone know of a good reference for the dimensions/steel grades that were used for these bars? A quick Google search says that these sized bars were added to the ACI code back in the 50's, but I was unable to find a good resource. The structure was built in the late 1960's if that helps.
Thanks a lot
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