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RE: shatter theory

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The earlier message was posted, and I for one am interested.  I was just
lurking to see the responses.

I have not heard of "shatter theory" before, but I will pose this question
to the people at Kalman Flooring who specialize in industrial floor
applications.  They do floors that are 100' x 100' with no joints, but 150
feet might be a stretch.

Harold Sprague
The Neenan Company

-----Original Message-----
From: bsd(--nospam--at) [mailto:bsd(--nospam--at)]
Sent: Friday, November 06, 1998 10:51 AM
To: seaint(--nospam--at)
Subject: shatter theory


I am designing a warehouse slab supporting racks with a Defined Traffic

The lift truck uses an embedded wiire in the concrete slab, and therefore
the slab cannot have any shrinkage joints along the lift-truck run.
Therefore, slab panels will be 15'x150' without any joints

i ran across a reference referring to designing the slab panel utilizing
shatter theory, which requires 1/2% steel 
ratio and will limit expected cracking to "micro-cracking" which is
acceptable for the lift-truck electronics.

I have designed rack slabs per PCI, WRI and slab drag theory but i haven't
previously heard of "shatter theory"

Does anyone know of a reference where I can find any information or other

thanks in advance