[Greenbuilding] Steel pan concrete systems

[Stewart Abbey]

Steel pan concrete systems were discussed a few weeks ago.  Could anyone tell me if they have used these, what the costs are compared to a plywood floor with a 
2-3" concrete slab on top? If you would use them again?  My application is for a radiant concrete floor slab on the first floor.  Rob Tom mentioned they could span 15 ft which is my exact span. Are they accepted by most residential codes when supported by wood stud walls.
Thanks Stewart

 		
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