Need a book? Engineering books recommendations...

Return to index: [Subject] [Thread] [Date] [Author]

Re: Old rebar

[Subject Prev][Subject Next][Thread Prev][Thread Next]
Per the CRSI booklet on old reinforcing:

The first ASTM for reinforcing steel was 1911... Rebars were plain and deformed steel in structural, intermediate and hard grades .. structural was normally used unless otherwise specified  

Specified minimum yield of structural, intermediate and hard grades were 33,000,  40,000 and 50,000 respectively.  

Area of an 1/2 bar  (per a 1924 report):  round = 0.196 sq in.,   square = 0.250 sq.in.

Gail S. Kelley, P.E.