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concrete on form deck
4

concrete on form deck

concrete on form deck

(OP)
I have a situation where the plans call for a 3 inch slab thickness and 1 1/2" form deck was installed instead of 9/16" specified.  Joist spacing is 2'-0".  The 1 1/2" deck itself is strong enough to carry service loads.  I am concerned about less than 2" cover over flutes.  Can the concrete be considered non structural filler and use a light gage mesh to keep it from cracking?    

RE: concrete on form deck

Better check fire rating requirements.

RE: concrete on form deck

Is your situation not specified in Vulcraft ?

RE: concrete on form deck

I don't see a problem with what was installed.   

BA

RE: concrete on form deck

I agree with ron9876, check your fire ratings. If this is for a corridor in an appartment building you maybe non-compliant.  

There are days when I wake up feeling like the dumbest man on the planet, then there are days when I confirm it.  

RE: concrete on form deck

(OP)
I did find an SDI reference to 1 1/2" min cover over the top flute which provided some assurance.  I beleive Vulcraft calls for a min of 2", but then using 1 1/2" deck for 2' spans would not be all that common, I would think.

It's an open mezzanine so fire separation should not be an  issue.  I was going with 1.4 wire 3/4" from the top.   We can tolerate some cracking as there will be a floor covering.  thanks for replies.

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