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Re: steel decking

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I disagree with you; steel deck works both as formwork, and as
reinforcement for permanent loads.

Juan C. Gray

Bill Allen wrote:
> 
> Although the metal deck usually only works as a concrete form and generally
> does not provide structural capacities once the concrete has achieved it's
> strength, there are several other concerns. First, you should verify the
> above assumption with the metal deck manufacturer of either the metal deck
> you specified or the deck the contractor used. If the deck manufacturer has
> confirmed the above assumption, the other worries are concerned with loads
> on the supporting members such as:
> 
> 1.    Since the deck is now being supported by members orthogonal to the
> original design, are they capable of supporting the design loads? Do the
> load paths still work?
> 
> 2.    Since the deck has deformed, there probably is more concrete than in
> the original design. This additional superimposed dead load is (probably)
> not acceptable with regards to the strength of the supporting members.
> 
> I would have a tendency to instruct the contractor to rip out the deck and
> concrete and do it right, report to the owner that the contractor doesn't
> know what he is doing and report the contractor to the state board for
> incompetence.
> 
> Other than that, it appears O.K. to me :o).
> 
> Regards,
> Bill Allen
> (the cynic)
> -----Original Message-----
> From: Dave Anderson <dnae(--nospam--at)earthlink.net>
> To: seaoc <seaoc(--nospam--at)seaoc.org>
> Date: Sunday, October 26, 1997 12:10 PM
> Subject: steel decking
> 
> >Hi
> >I need some opinion regard field matter
> >
> >I specified 20 GA steel decking to span 8 ft  with 4 1/2 " light weight
> >concrete the contractor change the direction of steel decking without
> >consulting me and  span it 12 feet without shoring one area deflect and
> >buckled out
> >about 8x12 feet  so he called me to fixed
> >what you think
> >1- adding a beam under the deflected area
> >     which is deformed,but it is very strong
> >2- remove the deformed (roof) decking and replaced
> >     with new one and pour new concrete
> >
> >thanks in advance
> >
> >Dave A. P.E.
> >
> >
> >
> >
>