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1957 steel beam strength??

1957 steel beam strength??

1957 steel beam strength??

(OP)
I have an old building to evaluate. Anyone know what was the strength of steel they used in 1957. I usually take an allowable of 20ksi, but I'm fairly close to the limit. Anyone??

RE: 1957 steel beam strength??

Per AISC Iron & Steel Beams 1873-1952 and FEMA 356, yield strength not less than 33 ksi.  Allowable tensile stress of 20 ksi.

RE: 1957 steel beam strength??

Fifth Edition, Manual of Steel Construction, 16th printing (1954)

20ksi for bending, 13 ksi for shear

RE: 1957 steel beam strength??

Fifth edition, AISC Manual of Steel Construction, Fifth printing (1948)

20 ksi bending, 13 ksi shear

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