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Re: concrete reinforcing steel
- To: seaint(--nospam--at)seaint.org
- Subject: Re: concrete reinforcing steel
- From: Jnapd(--nospam--at)aol.com
- Date: Thu, 7 May 2009 16:21:42 EDT
This year we have had 4 contractors asking and trying to bend stirrups at
job sites in order to save pennies and fore thought of ordering them from
the supplier. It is hard to keep a straight face when the contractor
complaines to the client that the rebar will not fit in the footing......I had
never seen 6" radiuses on #3 stirrups before.
Johnson & Nielsen Associates
Palm Springs, CA
In a message dated 5/7/2009 12:44:19 A.M. Pacific Daylight Time,
For many years it was assumed that 60 grade rebar was too
brittle to be bent into ties and stirrups. Devices for bending in the
old days for ties and stirrups was done with manual methods. Thus many
practitioners used 40 grade steel for ties and stirrups, but would specify 60
grade bar for flexural or compression rebar. There was another time
period that practioners would specify 60 grade bendable. Today most
rebar in all applications is 60 grade. And all the fabricators use
hydraulic presses for bending bar.
This was back in the
old "working stress" days and the "ultimate strength" era was
dawning. Man walked upright a couple weeks later.
Companies such as TAMCO (in California) today manufacture rebar
in 40, 60, and 75 grade. Walk tall, use 60 grade for
Regards, Harold Sprague
Date: Wed, 6 May 2009 16:11:35 -0700
Subject: concrete reinforcing
long as I can remember, #3 and #4 deformed bars were typically grade 40, while
#5 bars and larger were grade 60. Is that still the case? or is
this something local like here in the SF bay area?
David Topete, SE
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