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waterstops in slab

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For some of you that regularly do industrial work.  I am trying to finish up the drawings for a clarifier tank in a waste water treatment plant.  I have an old drawing dating back about 10 years that, for the slab construction joints, they just called out “keyed construction joint with waterstops, typ.”.  I have a copy of ACI “Concrete Structures for Containment of Hazardous Materials”.  In that publication there is a detail for a joint with shear transfer dowels and waterstops with the waterstop below the dowels.  There is no keyed joint in the detail in the ACI document.  I kind of lean towards the dowels (say 3/4” @ 24” o.c.), but if that is not typical for this type of construction I can go with the keyed joint.

 

What do some of you prefer for this situation, or does it matter?  I have a 12” slab thickness and about a 15’ deep circular tank.  The tank walls are also 12” thick.

 

Thanks,

Joe

 

Joseph R. Grill, P.E. (Structural)

Shephard - Wesnitzer, Inc.

Civil Engineering and Surveying