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RE: Concrete Cover

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If the concrete is not "structural," it is beyond the scope of ACI
318, which is "Building Code Requirements for Structural Concrete."

Regarding your particular situation, Section 1.1.6 of ACI 318-99 says,
"This code does not govern design and construction of soil-supported
slabs, unless the slab transmits vertical loads or lateral forces from
other portions of the structure to the soil."

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Michael Valley, P.E., S.E.                   E-mail: mtv(--nospam--at)skilling.com
Skilling Ward Magnusson Barkshire Inc.              Tel:(206)292-1200
1301 Fifth Ave, #3200,  Seattle  WA 98101-2699      Fax:        -1201

-----Original Message-----
From: Randy Diviney [mailto:rsdiviney(--nospam--at)hayeslarge.com]
Sent: Monday, January 29, 2001 1:21 PM
To: seaint(--nospam--at)seaint.org
Subject: Concrete Cover


Does section 7.7.1 of the ACI code apply to shrinkage and temperature
reinforcement?

I have a "frost wall slab" which occurs outside every exterior door
that I
don't consider structural in nature. These are typically 5' x 5' and
poured
on 6" of compacted crushed stone. We have been detailing them as 8"
thick
with #4 bars at 12" on center E.W. I would like to reduce this
thickness to
4" with the same rebar but as I read the code, 5 1/2" is the minimum.

Thanks for the help.
Randy Diviney
Structural Engineering Dept.
Hayes Large Architects
Altoona, Pa
(814)946-0451