rebar yield strength from 1952

huangyhg

rebar yield strength from 1952
i have a building that i am reviewing that has a reinforced one-way slab spanning to structural steel beams that was built in 1952.  i am trying to get a feel for the floor live load capacity.  in preparing to complete the analysis, i relized that i do not have the rebar yield strength.  what was the most common yield strength of rebar in 1952?  i am thinking 40ksi.
as always, i appreciate the input!
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