Modeling a Waffle slab

Is it possible to design a waffle slab with RAM Concept?  If so, can it be modeled in Modeler, then exported to Concept?  If I have a 4" topping slab on 12" deep ribs, I imagine that I would input 12" deep concrete beams at 2'-0" o.c. in one direction and 2'-0" long, 12" deep concrete infill beams at 2'-0" o.c. in the perpendicular direction, with the infill beams fixed at each end.  I'm not sure how to assign strips in Concept.  Is each rib at 2'-0" o.c. and 2'-0" long a column strip?