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RE: Yield strength of older rebar

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Roger & Harold,

Thanks for the info...

Harold had it exactly right...there was a line refering to "intermediate
billet-steel".  I had assumed that it was 40 ksi but wanted verification.

Thanks again,

Scott Maxwell


On Mon, 5 Jun 2000, Sprague, Harold O. wrote:

> Scott,
> 
> Reference CRSI Design Handbook, 1952.  I was using rebar for teething in
> 1952.
> 
> The ASTM A 305 specification was for the deformations on rebar, and had
> nothing to do with physical properties.  The physical properties for
> reinforcing steel were contained in the ASTM A 15 (Billet-steel), A 16
> (Rail-steel), or A 160 (Axle-steel).
> 
> The most commonly used reinforcing steel was the A 15 Intermediate.  You
> might find a reference to "intermediate billet-steel" which would be the 40
> ksi rebar.
> 
> ASTM A 15 deformed bar reinforcing steel was available in the following
> grades and yield strengths:
> Grade		Yield point (min)
> Structural	33 ksi
> Intermediate	40 ksi
> Hard		50 ksi
> 
> Regards,
> Harold Sprague
> 
> 
> > -----Original Message-----
> > From:	Scott E Maxwell [SMTP:smaxwell(--nospam--at)engin.umich.edu]
> > Sent:	Monday, June 05, 2000 8:59 AM
> > To:	seaint(--nospam--at)seaint.org
> > Subject:	Yield strength of older rebar
> > 
> > Is anyone familiar with ASTM 305 for reinforcing steel?  I am looking at a
> > building built around 1957 that specifies ASTM 305 for the rebar.  Would
> > this have a yield strength of 40 ksi, or something else?
> > 
> > Thanks,
> > 
> > Scott Maxwell
> > 
> 
> 
>