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Tolerable Slab Design

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I received a geotechnical report to review for a foundation design for a pre-
engineered metal building.  It is a warehouse type building with lots of 
open spaces.

The building is located on expansive soil.  One of the items in the report 
states to "design the slab to tolerate potential upward slab movement on the 
order of about 2 inches of active swell".  I don't recall ever seeing a 
design procedure for designing a slab on grade to accommodate upward slab 
movement of any amount.  IS there some design procedure I am not aware of?  
Can anyone cite a reference I can research to help understand it?

What are others commonly doing to design a warehouse type slab, large open 
spaces, for upward movements?  My thoughts are frequent shrinkage and 
construction joints to isolate slab panels and facilitate replacement if 
needed.

Thanks for any insight.

Rich


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