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Re: FW: WWF in slabs on form deck

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Curt,

Just curious.  Do you only provide the rebars over the girders
or over the beams also?

Thanks,

Tripp


--- "LaCount, Curt" <Curt.LaCount(--nospam--at)jacobs.com> wrote:
> Chris,
> 
> For reinforcing in slabs on metal deck see SDI requirements. 
> I think that I
> remember .00075 times the area of concrete above the metal
> deck (I don't
> have a copy in front of me).  Of course this is only for
> nominal crack
> control and cracks should be expected over supports and also
> at girders.
> Our office usually adds #3 bars over the tops of girders to
> keep cracks
> forming there tight.  Cracks do not seem to form over the
> supports in slabs
> that we've designed.
> 
> Curt La Count
> Jacobs Engineering
> Portland, OR
> 
> -----Original Message-----
> From: CHRIS BOWERS [mailto:BOWERC(--nospam--at)lrkimball.com]
> Sent: Thursday, May 29, 2003 7:10 AM
> To: seaint(--nospam--at)seaint.org
> Subject: WWF in slabs on form deck
> 
> 
> I was wondering how others feel about the amount of WWF
> required in
> slabs on metal form deck?  Take for example a 3" slab on 9/16"
> form
> deck-if you look at the ACI criteria, 6.0x6.0x1.4x1.4 does not
> provide
> enough area for temperature and shrinkage, you would need to
> go to the
> 2.9.  In talking to the engineer I work under, he has never
> had a
> problem in the 18 years he has practiced with the 1.4.  I also
> called
> another engineer at a metal deck provider and he said he has
> seen the
> 1.4 for over 40 years.  I am just trying to gauge how others
> feel about
> this.  Thanks to all in advance for any help.
> 
> 
> 
> Chris Bowers, EIT
> A/E Building Systems - Structures
> L. Robert Kimball and Associates
> Ebensburg, PA
> Phone:814-472-7700 xtn.350
> Fax:814-472-7712
> E-mail:bowerc(--nospam--at)lrkimball.com
> 
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=====
Tripp Howard

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