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RE: Bar versus wire

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Gail,

Is the ductility (peak strain and breaking strain) of the wire the same as that for the bar? In Australia, the wire is low ductility with a minimum breaking strain of 1.5% while bar has a minimum of 5%.

Consequently, redistribution of actions is not possible with wire as there is insufficient rotation capacity and minimum reinforcement requirements should be higher than for more ductile steels.


At 11:58 AM 19/11/02 -0800, you wrote:
There are different ASTM designations for rebar and for wire.  The yield strength varies within the kinds of wire you specify, but fy is generally higher than rebar even when the size is the same. 
 
Depending on the layout of the structure, there could also be placing advantages in placing wire sheets versus placing individual bars in each direction. 
 
Paul Crocker, PE, SE
 
-----Original Message-----
From: GSKWY(--nospam--at)aol.com [mailto:GSKWY(--nospam--at)aol.com]
Sent: Tuesday, November 19, 2002 11:45 AM
To: Seaint(--nospam--at)seaint.org
Subject: Bar versus wire

What is the difference between specifying bar versus wire,   i.e. a #5 versus D31 wire (same size).  If you specify D31 wire,  do you get it in a coil,  like what they fabricate the bars from?

What is the advantage of specifying D31 wire when it is something like a 10 ft length?  

I am trying to make sense out of something I am reading ...it pertains to research for bridge design.  

Gail S. Kelley

Regards  Gil Brock
Prestressed Concrete Design Consultants Pty. Ltd. (ABN 99003351504)
5 Cameron Street Beenleigh Qld 4207 Australia
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