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RE: Lt wt. conc topping for exterior decks

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Gerard:

I always thought that lightweight concrete was never to be left exposed to
the
Elements, ever.

My suggestion is the following:

Can the framing be changed to metal, either WF beams and composite deck or
Metal stud joists supporting a form deck?

This will add durability to the system and help with shrinkage...



If so, I would change the concrete to normal weight and apply a
waterproofing membrane suitable for pedestrian traffic to the surface to
protect the concrete.

http://www.dex-o-tex.com/index.php?href=products&query=1070


If this terrace is over occupied space, you will want to install rigid
insulation
And a topping slab to prevent condensation of the deck below.


And yes, use WWF or bar in lieu of fibermesh.


David L. Fisher  SE  PE
Senior Principal 
Fisher + Partners Structural Engineers inc
372 West Ontario 
Chicago 60610         
 
312.573.1701
312.573.1726 fax
312.622.0409 mobile
www.fpse.com         

David L. Fisher  SE  PE
Director
Head of Design and Construction
Cape Cod Grand Cayman Holdings Ltd
75 Fort Street
Georgetown Grand Cayman BWI
mobile 312.622.0409
www.ccgch.com











-----Original Message-----
From: Polhemus, Bill [mailto:bill.polhemus(--nospam--at)tyson.com] 
Sent: Tuesday, June 14, 2005 9:39 AM
To: seaint(--nospam--at)seaint.org
Subject: RE: Lt wt. conc topping for exterior decks

-----Original Message-----
From: Rick Stone [mailto:rstone(--nospam--at)madisonconcrete.com] 
Sent: Tuesday, June 14, 2005 6:44 AM
To: seaint(--nospam--at)seaint.org
Subject: RE: Lt wt. conc topping for exterior decks

I am on the side of the issue that believes fibers deliver very little
of
what they are promised to.

-----/Original Message-----

Wish I could disagree, but unfortunately I can't.

Perhaps synthetic fibers technology has advanced in the twenty-odd years
since I last trusted it to work as described, but based on personal
experience I really don't hold much with it. 


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