The steel stud options do not have any concrete; concrete, they represent steel framing, not steel rebar inside concrete.

It's possible that existing options in BEopt in e.g. the CMU or "Other" category are a close approximation of this construction type. Alternatively, you could model the construction in the THERM Software, calculate the effective conductivity, and then enter it (and other properties) as a new custom option in the "Other" category.