Talk to your W.R. Grace representative. Ask about "Procar" System Detail 6.
It may be on their web site at http://wwwgraceconstruction.com . We
designed a parking deck above a garage several years ago and it hasn't
leaked yet as far as I know and it is subject to the extremes of Wisconsin
Roger C. Davis
SDS Architects, Inc.
From: W. Gray Hodge [mailto:ghodge(--nospam--at)hodgedesign.com]
Sent: Friday, April 06, 2001 6:58 AM
Subject: P/C Bldg question
I am working on a golf car storage building project. We are using a
precast concrete DT's supported by P/C IT's and columns on interior
support lines and P/C wall panels around the perimeter. The structure
is built into a hillside (open on one side only) and the "roof" will
have two tennis courts.
I am concerned about the roof deck system. I presume that the DT's will
be erected un-topped and that the topping slab will be field poured. We
specify tooled/sealed joints to align with all joints between P/C
members. I also presume that a surface with that many joints will not
be desirable as a playing surface for tennis and that an additional
wearing/playing surface slab will be necessary.
The wearing surface (with inevitable water leaking and deterioration
problems) is where I anticipate some problems. My thoughts are that it
would be ideal to place a waterproof membrane over the topped P/C
decking, put a drainage mat of some sort over the membrane, protect the
drainage mat with some sort of protection board and then pour the
wearing/playing surface slab over the protection board. My hunch is
that the wearing slab should "float" on the structural system.
My questions are:
Has anyone had experience with a similar condition?
For drainage of the deck, the entire system will slope at 1"/10' to
scuppers and downspouts. How do I get the water out of the drainage mat
between the structural deck and the wearing slab? (Floor drains,
Any assistance will be greatly appreciated.