Rebar strength in 1958???
Rebar strength in 1958???
(OP)
Hi all,
I am looking at an existing building which references ACI 318-51 concrete code. THe drawings (produced in 1958) call for 20 ksi rebar per ASTM A305. I can't get a copy of this standard, as it is withdrawn. Does any know whether the 20 ksi steel is ultimate, yeild, or allowable stress. I know very little about the old ACI code, and only know of 40 and 60 ksi rebar, so any help is appreciated.
Thanks
I am looking at an existing building which references ACI 318-51 concrete code. THe drawings (produced in 1958) call for 20 ksi rebar per ASTM A305. I can't get a copy of this standard, as it is withdrawn. Does any know whether the 20 ksi steel is ultimate, yeild, or allowable stress. I know very little about the old ACI code, and only know of 40 and 60 ksi rebar, so any help is appreciated.
Thanks






RE: Rebar strength in 1958???
Allowable unit stress range from 18 to 25 ksi and are assumed to be Fy = 40 ksi. The range is for inventory, posting or operating. I didn't think listing them was appropriate for your case so I just gave the range.
Also, it might be advantageous to have a mill test of the material if it is critical.
Regards,

Qshake
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RE: Rebar strength in 1958???
best tincan
RE: Rebar strength in 1958???
THanks again