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Re: Slab on Grade

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In ACI 302.1R-96, "GUIDE TO CONCRETE FLOOR CONSTRUCTION," the forward
states:

"The quality of a concrete floor or slab is highly dependent on acheiving a
hard and durable surface that is flat, relatively free of cracks, and at the
proper grade and elevation."

The above is the only mention of the amount of cracks deemed acceptable and
its too ambiguous to be of any practical value.

L. Thomas Bayne
California CE
----- Original Message -----
From: "Argue and Associates" <bemargue(--nospam--at)sentex.net>
To: <seaint(--nospam--at)seaint.org>
Sent: Tuesday, February 29, 2000 9:17 AM
Subject: Slab on Grade


> We are currently reviewing a 7" thick industrial floor already in service
> for about 4 months with saw cuts at 20' c/c in one direction and 15' c/c
> in the other. There are a few cracks in the floor ranging from about
0.016"
> to 0.060" with the majority being around 0.030".  Does anyone know of a
> published acceptable crack width for a slab on grade?
>
> Tow motors driving across the unsealed joints create an irritating
> thumping noise.  Has anyone had this situation before?
>
> Brian McDonald P.Eng
>