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reinforcing grade in 1930's
2

reinforcing grade in 1930's

reinforcing grade in 1930's

(OP)
I've got a note on some 1933 drawings that says "Reinforcing steel to be new billets 20,000 lb. grade".  Does anyone know exactly what that means?  Should I assume 20,000 psi yield?

RE: reinforcing grade in 1930's

2
No, 20 ksi was the allowable stress.  In 1933, using an allowable of 20 ksi likely means that the yield stress is 40ksi or 50ksi.  I would be on 50 because a lot of what I've seen uses 0.4Fy for the allowable, but you can be conservative and use 40ksi.

RE: reinforcing grade in 1930's

(OP)
Thanks StructuralEIT.  That's great info in your link.  I was hoping it was Grade 40.

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